Air Pressure Questions And Answers

Latest Pressure and Force per unit area belts MCQ Objective Questions

Pressure and Pressure belts MCQ Question 1:

Consider the following statements (A) and (B) and cull the right option.

(A) Air pressure varies according to the temperature at the same body of water level.

(B) Areas with high temperature creates a depression-pressure area.

1. Both A and B are true and B is the right caption of A
2. Both A and B are true but B is non the correct explanation of A
3. A is true but B is simulated
4. A is false but B is truthful
5. Answer not known

Answer (Detailed Solution Below)

Option 1 : Both A and B are true and B is the correct explanation of A

The correct answer is Both A and B are true and B is the correct explanation of A.

Cardinal Points

• Air pressure is a force exerted on a surface past the air above information technology equally gravity pulls it to Earth.
• It is measured with the help of a barometer.
• Air pressure changes according to the temperature at the same sea level.
• The air pressure decreases when the temperature is high and vice versa.
• Areas with high temperatures create low-force per unit area areas.
• This is because the warm air rises.
• These areas are called low-pressure level areas.
• A low-pressure system has low pressure at its centre than in the areas effectually it.

 Thus, we can say thatair pressure level varies according to the temperature at the same bounding main level and areas with high temperature creates a low-pressure expanse.

Pressure and Pressure belts MCQ Question 2:

Which of the following is the area of lowest force per unit area over the Indian subcontinent during the hot dry atmospheric condition flavour?

1. Rann of Kachchh
2. Rajasthan
3. North-Westward India
4. Meghalaya

Respond (Detailed Solution Below)

Option three : North-West Bharat

The correct answer is North-Due west Republic of india.

Key Points

• North-West India is the surface area of lowest pressure over the Indian subcontinent during the hot weather flavour.
• The Thar Desert and adjoining areas of the north and central Indian subcontinent heat upward during hot seasons.
• This causes low pressure over northern and central areas.
• To fill up this void, the moisture-laden winds from the Indian Body of water rush into the subcontinent.
• The Northwest region becomes a depression-pressure area in summer.
• Due to the extremely hot surface of Globe, the air rises and Northwest India forms a low-pressure area of 970 MB.

 Thus, we tin can say that the Northward-W is the area of lowest pressure over the Indian subcontinent during the hot dry atmospheric condition season.

Pressure and Pressure belts MCQ Question three:

Trough and ridge are

1. elongated area of low pressure level and of high pressure respectively
2. elongated areas of low pressure
3. elongated areas of high pressure
4. elongated area of high force per unit area and of low  pressure respectively

Answer (Detailed Solution Below)

Choice 1 : elongated surface area of depression pressure and of high pressure respectively

The correct answer is option one .

• A trough is an elongated area of relatively low pressure level extending from the centre of a region of low force per unit area.
• A ridge is an elongated area of relatively high pressure extending from the centre of a loftier-force per unit area region.

Primal Points

• Troughs and ridges are pressure field qualities that can be noticed on a atmospheric condition map.
• Troughs are found in low-pressure level locations, whereas ridges are plant in high-pressure areas.
• Troughs are elongated areas of low pressure level that generally occur before a common cold forepart. A trough is sometimes a sign of impending clouds, precipitation, or a modify in current of air management.
• Ridges are extended areas of relatively high pressure in the atmospheric condition. Every bit a result, the expanse around them becomes dry. They can likewise bring onshore breezes, which can cause coastal rains.
• Troughs are notorious for providing absurd, cloudy weather, whereas ridges typically offer warmer, drier weather. This phenomenon occurs when the air in a high-pressure area or ridge compresses and warms as information technology falls. When this happens, deject production is slowed, therefore sunny skies are more than frequent in high-force per unit area areas. When it comes to depression-pressure areas, the reverse is true.

Pressure and Pressure belts MCQ Question 4:

In July, Inter Tropical Convergence Zone (ITCZ) is located around

1. 5° N to 5° Due south latitudes
2. 15° North to twenty° N latitudes
3. 10° Due north to xv° Due north latitudes
4. 20° N to 25° N latitudes

Answer (Detailed Solution Beneath)

Option iv : 20° N to 25° N latitudes

The correct respond is twenty° North to 25° N latitudes.

Key Points

• The Inter-Tropical Convergence Zone, or ITCZ, is the region that orbits Globe, near the equator, where the northern and southern hemisphere trade winds converge.
• In January the ITCZ ​​is located at approximately 15°S.
• In July it is situated at 20°N to 25°N.

Important Points

• The Intertropical Convergence Zone(ITCZ) is a low-force per unit area area located on the equator.
• Trade winds are constitute in this region.
• So the air starts rising in this area.
• I.T.C.Z in the calendar month of July. 20° to 25°N.
• It is situated in the Gangetic plain around the latitudes.
• Sometimes called a monsoon trough, this monsoon trough encourages the development of thermal low air pressure over north and north-west India.
• Due to the northward movement of ITCZ, the merchandise winds of the southern hemisphere cross the equator betwixt 40° and 60° East longitude.
• Under the influence of the Coriolis force, the direction of these merchandise winds crossing the equator becomes from southwest to northeast.

Pressure level and Pressure belts MCQ Question 5:

In which region of the world 'Roaring Forties' blow ?

1. Betwixt 10° S and 30° S latitudes
2. Between 40° North and 50° N latitudes
3. Betwixt 40° S and 50° Southward latitudes
4. Between ten° Northward and x° S latitudes

Answer (Detailed Solution Beneath)

Option 3 : Between 40° S and 50° S latitudes

The correct answer is Between 40° S and 50° South latitudes.

Key Points

• Roaring Chalisa, Fierce Fifty, and Screaming Sixty are the names of the latitude bands, which bridge xl° – 50° South, 50° South – threescore° Due south, and 60°, respectively, in the Southern Sea.

Of import Points

• The westerly winds accident from southwest to northeast in the northern hemisphere and from northwest to southeast in the southern hemisphere.
• Due to the intensity of westerly winds in the Southern Hemisphere, they are called 'Thunder Chalisa' betwixt 40 and 50 degrees south latitude and 'Prachanda Pachasa' in the adjoining areas of 50 degree due south breadth and 'Screaming Satha' near 60 caste south latitude.
• The extent of these winds towards the poles is quite unstable, which keeps on changing according to the atmospheric condition and other reasons.

Top Pressure and Pressure belts MCQ Objective Questions

The planetary winds that flows between the sub tropical highs and equatorial low is known as -

1. Polar Easterlies
2. Merchandise winds
3. Westerlies
4. None of the above

Answer (Detailed Solution Beneath)

Selection two : Trade winds

The correct respond is Trade winds.

Cardinal Points

• Planetary winds are the winds that blow fromloftier-pressure belt to low pressure level chugalug.
• In that location are three types of planetary winds namely,Trade winds, Westerlies, and Easterlies.

​​Merchandise winds -

• These winds accident in 10 - 30 degrees latitude in the northern and southern hemispheres.
• These are permanent east to west prevailing winds that flows in the world'southward equatorial region.​

Westerlies -

• The "Westerlies winds" blow in thirty - 60 degrees latitude in the northern and southern hemispheres.
• These are the prevailing winds that move from thewest towards the east.
• They originate from the high-pressure level areas in the horse latitudes and moves towards the poles.
• These winds are strongest in the winter zone.
• There are three winds that fall under the "Westerlies" namely,Roaring forties, Furious fifties, and Shrieking sixties

​Easterlies -

• These winds blow in threescore-90 degrees latitude in the northern and southern latitudes.
• They blow from loftier-pressure level areas of polar highs at the due north and south poles.

​

The Coriolis effect is the issue of

1. Force per unit area gradient
2. Earth's axis of inclination
3. World's rotation
4. Globe's revolution

Answer (Detailed Solution Beneath)

Selection three : Earth's rotation

The correct reply is Earth'south Rotation .

• The Coriolis upshot is the result ofEarth'southward rotation.

Fundamental Points

• Coriolis Force:
  • The Coriolis effect is the pattern of deflection which objects have while travelling through long distances on Earth.
  • The key to the Coriolis outcome is the result ofGlobe's rotation.
  • Considering of the Coriolis force, all the winds are deflected to the right in the Northern Hemisphere.
  • They are deflected to the left in the Southern Hemisphere.
  • This is referred to as Farrell'due south Law.
  • The Coriolis force is absent along the equator but increases progressively towards the poles.
  • 

Additional Information

• The rate of change of pressure with respect to altitude is the pressure gradient.
• The pressure gradient is potent where the isobars are shut to each other and are weak where the isobars are apart.

In the context of climate, what is the total form of ITCZ?

1. Indian Trough Conversation Zone
2. Inter Tropical Convergence Zone
3. Intra Temperate Command Zone
4. Islandic Tropical Climate Zone

Answer (Detailed Solution Beneath)

Option two : Inter Tropical Convergence Zone

The Right Reply is Inter-Tropical Convergence Zone .
Key Points

• The Intertropical Convergence Zone, or ITCZ, is the region that circles the Earth, well-nigh the equator.
• Here the trade winds of the Northern and Southern hemispheres come together.
• The intense sunday and warm h2o of the equator heats the air in the ITCZ, raising its humidity and making it buoyant.
• With the aid of convergence of the trade winds, the buoyant air rises.
• As the air rises it expands and cools, releasing the accumulated moisture in an most perpetual series of thunderstorms.

______ is an equatorial belt of low atmospheric pressure where the trade winds converge.

1. Moraine
2. La Nina
3. El Nino
4. Doldrums

Answer (Detailed Solution Below)

Option 4 : Doldrums

The correct respond is Doldrums.

• Doldrums is an equatorial chugalug of low atmospheric pressure where the trade winds converge.

Central Points

Moraine

• Morainesare distinct ridges or mounds of debris that are directly laid down by a moving glacier. This textile is usually soil and rock.
• Moraines only bear witness up in places that accept, or used to have glaciers.
• Glaciers are extremely large, moving rivers of ice.
• Glaciers shape the mural in a process calledglaciation.
• Glaciation can bear upon the state, rocks, and h2o in an area for thousands of years. That is why moraines are oftentimes very old.

La Nina

• La Ninais a climate pattern that describes the cooling of surface ocean waters along the tropical west coast of S America.
• La Ninais the counterpart of El Nino.
• La Lina means Little Girl in Spanish.
• La Lina occurs at irregular intervals of about two to seven years.
• La Niña is acquired by a build-upwardly of libation-than-normal waters in the tropical Pacific, the surface area of the Pacific Sea betwixt the Tropic of Cancer and the Tropic of Capricorn.
• Unusually strong, eastward-moving merchandise winds and ocean currents bring this cold h2o to the surface, a procedure known as upwelling.

El Nino

• El Nino is a climate pattern that describes the unusual warming of surface waters in the eastern tropical Pacific Body of water.
• El Nino means Christ child or Littel Boy in Castilian
• During the time of El Nino, the trade winds weaken and warm water pushed dorsum due east towards the declension of Latin American countries.
• El Nino tin affect our weather condition significantly and merchandise winds.
• El Nino has a strong event on marine life off the Pacific coast.

Additional Data

• Atmospheric Pressure belts are seasonally identical horizontal pressure variations created in the world's atmosphere just above the earth's surface due to seasonal and spatial variation of energy received by the earth at different places.
• There are seven pressure belts on the world'due south surface. They are the Equatorial Low, the ii Subtropical highs, the two Subpolar lows, and the two Polar highs. Except for the Equatorial depression, the others class matching pairs in the Northern and Southern Hemispheres.

​ Equatorial Depression-Pressure Belts

• It is located on either side of the North and South of the Equator in a zone extending from 0o to 5^o.
• Information technology is thermally induced because of theintense heating of the ground past the vertical rays of the sun.
• It represents the zone convergence of N-East and Due south-East trade winds. This convergence zone is characterized by light and feeble winds and because of the frequent at-home atmospheric condition, this belt is besides chosen a chugalug of at-home or doldrums.

Subtropical High-Pressure Belts

• It extends between30^o to 35^o  both the hemisphere
• It is non thermally induced just dynamically induced as it owes its origin to the rotation of the world and sinking and settling downwards of winds.
• Here the zone convergence of winds at a college altitude above this zone results in the subsidence of air from higher altitudes and this wind results in loftier pressure. This zone of high pressure is likewise called the Horse latitude.
• The permanent winds blowing from the Sub-Polar High-Pressure to Sub-Polar Low-Force per unit area in both the hemisphere are chosenWesterlies.

Sub-Polar Low-Pressure Belts

• It extends between sixty^o and 65^o  in both the hemisphere.
• The low-pressure belt does not thermally induce because in that location is low temperature throughout the yr and equally such there should have been a loftier-pressure level belt instead of depression pressure.
• Force per unit area gradient, rotation of the earth and Coriolis forcefulness, centrifugal activity of current of air are the factor that controls the air motion.
• This region is marked by vehement storms in winter.

Polar High-Pressure Belts

• Polar high pressure is very modest in area and extends between 70^o to 90^o in both the hemisphere.
• The temperatures are always extremely low.
• The Polar regions feel very common cold climatic conditions due to the rays of the sun is extremely slanting.
• These regions of Polar high-pressure belts are known equally the Polar Highs.
• These regions are characterized by permanent IceCaps.

Consider the following statements:

one. Jet streams occur in the Northern Hemisphere simply.

2. Only some cyclones develop an eye.

3. The temperature inside the centre of a cyclone is nearly ten°C lesser than that of the environment.

Which of the statements given above is/are right?

1. ane only
2. 2 and 3 but
3. ii only
4. 1 and iii only

Answer (Detailed Solution Below)

Selection 3 : 2 only

The correct reply is two only .

Key Points

• Jet streams occur in both the Northern and Southern Hemispheres.Hence argument 1 is not correct.
• Extra-tropical cyclones may not always have an centre, whereas mostly mature storms accept well-developed eyes.
  • Speedily intensifying storms may develop an extremely modest, clear, and circular eye, sometimes referred to as a pinhole eye.Hence statement 2 is correct.
• It is warmer and non colder inside the centre of the tropical cyclone.
  • The warmer temperature is what drives the storm.Hence statement 3 is non right.

Important Points

• Jet Stream
  • Jet streams are the strong air streams present in the upper troposphere.
  • They are relatively narrow belts of swift-moving winds having velocity in the range of 100km/60 minutes to 900km/60 minutes.
  • Jet streams follow curved and meandering path and such path is because of Coriolis effect
  • And due to the trend of large scale system to conserve the angular momentum.
  • They are very potent winds.

• Conditions to class tropical cyclone
  • Large bounding main surface with a temperature higher than 27° C.
  • Presence of the Coriolis force plenty to create a cyclonic vortex.
  • Small variations in the vertical wind speed.
  • A pre-existing weak low-force per unit area surface area or low-level-cyclonic apportionment.
  • Upper divergence above the sea level system.

What happens as we go up the mountain?

1. The temperature increases
2. The pressure increases
3. Temperature increases but pressure decreases
4. Both temperature and pressure level decreases

Reply (Detailed Solution Below)

Choice 4 : Both temperature and pressure decreases

The correct answer is Both temperature and pressure decreases .

Climatic Controls -

• Thesix major controls of the climate are -pressure and current of air system, altitude from the sea, ocean currents, breadth, altitude, and relief features.
• The amount of solar energy received varies w.r.t latitude,due to the curvature of the earth.
• Hence, air temperature more often than not decreases from the equator towards the poles.
• Also, as 1 goes from the surface of the earth to higher altitudes, the atmosphere becomes less dense, pressure level decreases, and temperature decreases.
  • Every bit you increase in elevation, at that place is less air above y'all thus the pressure level decreases.
  • Equally the force per unit area decreases, air molecules spread out further (i.e. air expands), and the temperature decreases.

Which of the following statements is/are correct, with reference to Inter-Tropical Convergence Zone?

1. It is a depression-pressure zone located at the equator where Merchandise Winds converge.

2. In this zone, air tends to descend.

3. In July, it is located effectually 20⁰ Northward-25⁰ N latitudes.

Which of the following statements given higher up is/are right?

1. 1 merely
2. 2 and 3 but
3. one and iii only
4. 1, 2 and three

Answer (Detailed Solution Below)

Option three : 1 and 3 simply

The correct answer is 1 and three only .

Important Points

• The Inter-Tropical Convergence Zone (ITCZ) is a depression-force per unit area zone located at the equator where trade winds converge, so, it is a zone where air tends to ascend. Hence argument i is correct and 2 is not correct.

Key Points

• In July, the ITCZ is located around 20^o N 25⁰ North latitudes (over the Gangetic plain), sometimes called the monsoon trough.Hence statement iii is correct.
  • This monsoon trough encourages the development of thermal low over due north and northwest Bharat.
• Due to the shift of ITCZ due to the credible motility of the sun, the trade winds of the southern hemisphere cantankerous the equator between 40⁰ and 60⁰ E longitudes and start blowing from southwest to northeast due to the Coriolis forcefulness.
  • Information technology becomes southwest monsoon.
• In wintertime, the ITCZ moves south, and then the reversal of winds from northeast to south and southwest takes place.
  • They are called northeast monsoons.

Intertropical Convergence Zone (ITCZ), a low-pressure zone, is located

1. between trade winds and westerlies chugalug
2. betwixt westerlies and polar winds belt
3. nearby the poles
4. near the equator

Answer (Detailed Solution Beneath)

Option 4 : near the equator

The right answer is near the Equator.

Primal Points

• The Intertropical Convergence Zone, or ITCZ, is the region almost the equator of the earth, where the trade winds of the Northern and Southern Hemispheres come together.
• The intense heating due to the sun and the water of the equator heats the air in the ITCZ.
• Equally the air rises it expands and cools, releasing the accumulated moisture in an near perpetual series of thunderstorms.

Additional Information

Merchandise Winds

• The trade winds are the winds that blow from the subtropical high-pressure areas towards the equatorial low-pressure chugalug.
• These are confined to a region between thirty°N and 30°S throughout the globe's surface.
• They flow as the north-eastern trades in the northern hemisphere and the south-eastern trades in the southern hemisphere.

Westerlies

• The westerlies are the winds bravado from the subtropical high-pressure belts towards the sub-polar depression-pressure belts.
• They blow from due south­west to northward-east in the northern hemisphere and north-west to due south-east in the southern hemisphere.

 Polar easterlies

• The Polar easterlies are dry, cold prevailing winds bravado from north-due east to southward-west management in Northern Hemisphere and south-east to the north-west in Southern Hemisphere.
• They blow from the polar high-force per unit area areas of the sub-polar lows.

What is the normal air pressure level at sea level?

1. 1013.25 millibars
2. 985.14 millibars
3. 886.13 millibars
4. 1100.12 millibars

Answer (Detailed Solution Below)

Option 1 : 1013.25 millibars

The correct answer is 1013.25 millibars.

Important Points

• The normal air pressure at ocean level is 1,013.2 millibars.
• The air at the surface is denser due to gravity, which hence has greater pressure.
• Air pressure is measured using a mercury barometer or aneroid barometer.
• The value of what nosotros call standard sea-level pressure is760mm of mercury, 1013.25 x103 dynes per square centimeter, 14.70 pounds per foursquare inch, 1013.25 millibars, or just one standard temper which is 101.325 kilopascals.
• The air majorly contains 72 pct nitrogen and 21 percent oxygen, in addition to a small amount of carbon dioxide, hydrogen, etc.
• Air has weight and thus, like liquids, it exerts force per unit area.
• A forcefulness is exerted by the atmospheric air on all objects in the atmosphere and on the globe.
• The force or thrust exerted on a unit area by the atmospheric air is divers as atmospheric pressure.
• 1.013 ten 105 Pa is the approximate value of atmospheric pressure on the earth'south surface.
• The standard atmospheric pressure level is 0.760 mHg at 0 °C.
• This is a force per unit area equal to 101325 Pa.

Horse latitudes prevarication inside the atmospheric pressure belts of _______.

1. Polar high
2. Equatorial depression
3. Sub-tropical high
4. Sub-polar depression

Respond (Detailed Solution Beneath)

Pick 3 : Sub-tropical loftier

The right answer is Subtropical high .

Cardinal Points

• Sub-Tropical High-Pressure Chugalug or Horse Latitudes
  • The sub-tropical highs extend from near the tropics to about 35°N and S.
  • After saturation (complete loss of moisture) at the ITCZ, the air moving away from the equatorial low-force per unit area belt in the upper troposphere becomes dry out and cold.
  • This dry and cold wind subsides at 30°N and Southward.
  • And then the high pressure along this chugalug is due to the subsidence of air coming from the equatorial region which descends afterward becoming heavy.
  • The loftier pressure is also due to the blocking effect of air at upper levels because of the Coriolis strength.
  • The subsiding air is warm and dry, therefore, most of the deserts are present forth this chugalug, in both hemispheres.
  • A calm status (anticyclonic) with feeble winds is created in this high-pressure chugalug.
  • The descending air currents feed the winds bravado towards bordering low-pressure belts.
  • This chugalug is frequently invaded by tropical and extra-tropical disturbances.
  • The corresponding latitudes of the subtropical loftier-pressure chugalug are chosen horse latitudes. Hence, Option 3 is correct.
  • In the early on days, the sailing vessels with a cargo of horses institute information technology hard to sail under the calm conditions of this high-pressure belt.
  • They used to throw horses into the body of water when forage ran out. Hence the name horse latitudes.

Equatorial low pressure belt is extended from

1. 10° N–x° Southward
2. 0°–5° N
3. five° N–5° S
4. None of the above

Answer (Detailed Solution Beneath)

Option 3 : five° Due north–5° S

Atmospheric pressure belts: The distribution of atmospheric pressure beyond the latitude is termed the global horizontal distribution of pressure. Its main feature is its zonal grapheme known every bit pressure belts.

Key Points

• On the earth's surface, there are seven pressure level belts.
• They are the Equatorial Low, the two Subtropical highs, the two Subpolar lows, and the 2 Polar highs.

Equatorial low-pressure belt:

• This chugalug happens to be thezone of convergence of merchandise winds from ii hemispheres from subtropical high-pressure belts.
• This chugalug is too called the Doldrums, because of the extremely at-home air movements.
• The position of the belt varies with the apparent movement of the Dominicus.
• Every bit this region lies forth the equator, it receives the highest amount of insolation.
• Due to intense heating, the air gets warmed up and rises over the equatorial region (convection).
• Whenever at that place is a vertically upward movement of air, the region at the surface will be at low pressure. Thus the belt along the equator is called the equatorial depression-pressure belt.
• Every bit the larger part of the low-pressure belt passes along the oceans, the winds obtain a huge amount of moisture.
• Vertical winds (convection) carrying moisture from cumulonimbus clouds and lead to thunderstorms (convectional rainfall).
•  In spite of high-temperature cyclones are not formed at the equator because of 'nothing' Coriolis force.

​ Hence, the correct answer is 5° Northward – 5° South.

1. All the pressure belts are extended upward to 5º on both sides.
2. Equatorial depression-pressure level belts vary from 10ºN and 10º S to xxº N to 20º Southward, however, their width is constant for 5º N and vº Due south.
3. Seasonally the pressure belts change their position upwardly to some extent.
4. The trade wind blows betwixt the tropics towards the equatorial low-pressure level zone and5° N – 5° South a calm condition prevails due to convergence of two wind.
5. In this question, nosotros are considering the permanent position of the Equatorial low-pressure belt which is from5º N and 5º Due south.

​ Additional Information

Subtropical Loftier-Force per unit area Belts:

• At about 30°North and Southward of the Equator lies the area where the ascending equatorial air currents descend.
• This area is thus an expanse of high pressure.
• It is also called the Equus caballus latitude.
• Winds e'er blow from high pressure level to depression pressure level.
• So the winds from the subtropical region accident towards the Equator every bit Trade winds and another current of air blow towards Sub-Polar Low-Pressure equally Westerlies.

Subpolar Depression-Pressure Belts:

• These belts located between threescore° and 70° in each hemisphere.
• In this region, the air gets divided into 2 parts.
• I function blows towards the Equatorial Low-Pressure Belt.
• The other part blows towards the Circum- Polar Depression-Pressure Belt.
• Centrifugal forces operating in this region create the low-pressure belt.
• This region is marked by violent storms in winter.

​Polar High-Pressure Belt:

• At the Northward and South Poles, betwixt 70° to ninety° North and Southward, the temperatures are always extremely low.
• The cold descending air gives rising to loftier pressures over the Poles.
• These areas of Polar high pressure are known as the Polar Highs.
• These regions are characterized past permanent Ice Caps.

Which of these regions is NOT a 'High Pressure Chugalug'?

1. Polar region
2. Sub Tropical Region
3. Equatorial region
4. None of the above

Respond (Detailed Solution Below)

Pick 3 : Equatorial region

The correct answer is Equatorial Region .

• The Equatorial region is not a High-Pressure Belt .
• A high-pressure chugalug is a high atmospheric pressure region.
• There are also low-pressure level belts and these differences in pressure are caused by uneven heating of Earth considering of its spherical shape.
• Every bit theequatorial region gains a lot of heat throughout the twelvemonth the air there is hot and of low density which causesa low-pressure belt.
• On the other hand, thepolar region receives less oestrus and therefore the air there is cold and of loftier density which causes theloftier-pressure chugalug.

• The different belts are listed below:

Equatorial Low Pressure

Subtropical High-Force per unit area Belts

Circum-Polar Low-Pressure Belts

Polar Loftier-Pressure level Areas

Which among the following statements is incorrect with respect to pressure belts?

1. Subtropic High Pressure Belt is characterized by anti-cyclonic weather condition
2. ITCZ is known every bit the region of convergence virtually the equator considering the winds flowing from subtropical high-pressure belts converge here
3. The winds developed in Subtropical loftier-pressure are called westerlies
4. Shrieking Sixties are the westerlies occurs in the Sub Polar Pressure Belts

Answer (Detailed Solution Below)

Option 3 : The winds developed in Subtropical high-force per unit area are called westerlies

Option 3 is Non right.

• Subtropical loftier-pressure belt:
  • Information technology extends from the tropics to about 35° latitudes in both hemispheres.
  • The ascending air of the equatorial region is deflected towards the poles due to the earth's rotation.
  • After becoming common cold and heavy, the air descends in these regions and gets piled up, which results in high pressure.
  • This zone is characterized by anti-cyclonic weather condition, which lead to atmospheric stability and aridity.
  • Air current in this zone is known as tropical easterlies i.e northeast merchandise winds in the northern hemisphere and due south due east merchandise winds in the southern hemisphere.
• ​Equatorial low-pressure level belt:
  • This belt extends from the equator ten° Northward to ten° S latitudes.
  • The intertropical convergence zone (ITCZ) is known as the region of convergence near the equator because the winds flowing from subtropical loftier-force per unit area belts converge here.
  • This low-pressure chugalug is as well known every bit doldrums because it is a zone of total calm without whatever winds.
  • Due to high temperatures, a depression-pressure belt is created in the equatorial region.
  • This gives ascent to air convergence in the expanse.
• Sub-Polar Low-Pressure Belts:
  • They extend between 45° N and the Arctic Circle in the northern hemisphere and betwixt 45° South and the Antarctic circle in the southern hemisphere.
  • Winds coming from the sub tropical and the polar high belts converge here to produce cyclonic storms or low-pressure weather due to the formation of fronts.
  • This zone of convergence is also known as the polar front. This region is marked past violent storms in winter.
  • The winds developed in this region are chosen westerlies.
  • Depending on the latitudes, Westerlies are also known as Roaring Forties, Furious Fifties, and Shrieking Sixties.

Which of the following latitudes are known as "Horse latitudes"?

1. 75 - ninety degrees north and south of the equator
2. 25 - 35 degrees north and south of the equator
3. 45 - 65 degrees north and south of the equator
4. 0 - 25 degrees north and south of the equator

Answer (Detailed Solution Beneath)

Option 2 : 25 - 35 degrees north and south of the equator

On the earth's  surface, in that location are seven pressure belts . They are the Equatorial Depression, the two Subtropical highs, the ii Subpolar lows, and the 2 Polar highs. These are sometimes chosen with some specific names. i.due east. ITCZ, horse latitude, etc.

Key Points

Horse latitudes:

• The equus caballus latitudes are regions located at about 30 degrees due north and s of the equator.
• These latitudes arecharacterized past at-home winds and petty precipitation.
• The equus caballus latitudes are located at about 30 degrees northward and due south of the equator.
• The subtropical high-pressure belts are a known region for spiritual peace and eternal calmness.
• It is a much popular theory of the earlier times, the Spanish transported horses by ship to their colonies in the West Indies and to America.

So, it is articulate that Horse latitudes are located between 25 - 35 degrees n and due south of the equator.

Hence, option 2 is the right answer.

Additional Data

Inter-Tropical Convergence:

• The Inter-Tropical Convergence Zone (ITCZ,) isa broad trough of low pressure in equatorial latitudes.
• This is wherethe northeast and the southeast trade winds converge.
• It is located betwixt 5º on both sides of the equator.

​ The Roaring Forties  are extremely powerful westerly winds that accident in the Southern Hemisphere betwixt latitudes twoscore° and fifty°.

​Beyond 35º, the polar frontal zone likewise starts.

Consider the post-obit statements nigh Equatorial Low Pressure level Belt.

i. It lies between ten°Due north and 10°S latitudes.

2. This chugalug is characterized by extremely depression pressure with calm conditions.

iii. The corresponding latitudes of Equatorial Low Pressure belt are called equus caballus latitudes.

Which of the statements given in a higher place is/are correct:

1. 1 and 2 only
2. 1 and 3 but
3. 2 and three merely
4. 1, two and 3

Reply (Detailed Solution Below)

Option ane : one and 2 only

The correct answer is 1 and ii only .

Important Points

• Equatorial Low-Pressure Belt or Doldrums:
  • Lies between 10°N and 10°S latitudes. Hence, statement ane is correct.
  • Width may vary between v°N and v°S and 20°Northward and 20°South.
  • This belt happens to be the zone of convergence of trade winds from 2 hemispheres from subtropical high-force per unit area belts.
  • This belt is likewise called the Doldrums, because of the extremely calm air movements. Hence, argument 3 is wrong.
  • The position of the belt varies with the apparent movement of the Sun.
  • This belt is characterized past extremely depression pressure with calm conditions. Hence, statement 2 is right.
  • This is considering of the absence of Surface winds since winds budgeted this belt to begin to rise most its margin. Thus, only vertical currents are found.
  • In spite of high temperatures, cyclones are non formed at the equator because of zero coriolis strength.

Statement I:  The Doldrums is a low-pressure expanse around the Equator where the prevailing winds are calm

Statement Ii:  Low pressure is caused by the heat at the Equator which makes the air rise and travel both Northwards and Southwards

1. Both the statements are individually true and Statement II is the correct explanation of Argument I
2. Both the statements are individually true simply Argument II is not the correct explanation of Statement I
3. Statement I is true but Statement II is false
4. Argument I is simulated only Argument Two is true

Respond (Detailed Solution Below)

Pick 1 : Both the statements are individually true and Statement 2 is the correct caption of Statement I

The correct answer is ane .

Key Points

• Equatorial Low-Pressure Belt or 'Doldrums'-
  • It is located in the vicinity of the geographical equator between five° North and five° South latitude.
  • Width may vary between 5°N and 5°Due south and 20°N and twenty°S.
  • This belt is also called the Doldrums, because of the extremely calm air movements. Hence, statement one is right.
  • It is the region of convergence of merchandise winds blowing equatorward from the sub-tropical belts of high pressure in the northern and southern hemispheres.Hence, statement 2 is right and Statement 2 is the correct explanation of Statement ane.
  • The position of the belt varies with the credible movement of the Sun.

Of import Points

• Formation of Equatorial Depression-Pressure Belt
  • ​Equally this region lies forth the equator, it receives the highest amount of insolation.
  • Due to intense heating, the air gets warmed up and rises over the equatorial region (convection).
  • Whenever at that place is a vertically upward motility of air, the region at the surface will be at depression pressure. Thus the belt forth the equator is called the equatorial low-pressure chugalug.

The main reason that the world experiences highest temperatures in the subtropics in the northern hemisphere rather than at the equator is :

1. Subtropical areas tend to accept less deject cover than equatorial areas.
2. Subtropical areas take longer solar day hours in the summertime than the equatorial.
3. Subtropical areas accept an enhanced "light-green house effect" compared to equatorial areas.
4. Subtropical areas are nearer to the oceanic areas than the equatorial locations.

Answer (Detailed Solution Beneath)

Option 1 : Subtropical areas tend to have less cloud encompass than equatorial areas.

The correct answer is Option 1.

Key Points

• The cloud comprehend present in the skies of the equator helps in reducing the amount of sunlight falling on the earth surface, which is mostly absent in the skies of sub-tropical areas causing most of the sunlight to autumn on the surface. Hence, option 1 is right.
• Likewise, at the equator, almost of the sunlight is used in evaporating water from seas and other water bodies, rather than increasing the actual temperature of the region.
  • While in the sub-tropical zone, this absorption of sunlight decreases because of fewer water bodies as compared to the equatorial region which ultimately causes more than sunlight to be absorbed by the earth surface.
• Here, air also plays a vital part.
  • The warm air of the equator drains the maximum of its moisture in the clouds in equatorial regions and continues to rise.
  • This warm and dry air at present begins to movement towards the pole but due to the Coriolis force, information technology whirls closer to the surface in the tropics and sub-tropics.
  • During its descent, the air becomes hotter and increases its temperature and ultimately, increases the temperature of state.
• Hence, the earth experiences the highest temperatures in the subtropics in the northern hemisphere rather than at the equator.

The following(SEVEN) items consists of ii statements, Statement I and Statement II. Yous are to examine these two statements carefully and select the answers to these items using the code given below:

Statement I:  The Doldrums is a depression-force per unit area area around the Equator where the prevailing winds are calm

Statement II:  Low pressure level is acquired by the oestrus at the Equator which makes the air ascent and travel both Northwards and Southwards

1. Both the statements are individually true and Statement 2 is the correct explanation of Statement I
2. Both the statements are individually true but Statement II is non the correct explanation of Statement I
3. Statement I is true but Argument Ii is false
4. Statement I is false but Statement II is true

Reply (Detailed Solution Below)

Option 1 : Both the statements are individually true and Argument 2 is the correct explanation of Argument I

The correct respond is one .

Primal Points

• Equatorial Low-Force per unit area Chugalug or 'Doldrums'-
  • It is located in the vicinity of the geographical equator betwixt v° Due north and 5° S breadth.
  • Width may vary between 5°N and v°S and 20°Due north and 20°S.
  • This chugalug is also chosen the Doldrums, considering of the extremely calm air movements. Hence, statement 1 is correct.
  • It is the region of convergence of merchandise winds blowing equatorward from the sub-tropical belts of high pressure in the northern and southern hemispheres.Hence, statement 2 is right and Statement 2 is the right explanation of Statement 1.
  • The position of the belt varies with the apparent move of the Dominicus.

Important Points

• Formation of Equatorial Low-Pressure Chugalug
  • ​As this region lies along the equator, it receives the highest corporeality of insolation.
  • Due to intense heating, the air gets warmed up and rises over the equatorial region (convection).
  • Whenever there is a vertically up move of air, the region at the surface will be at low pressure. Thus the belt along the equator is called the equatorial low-pressure chugalug.

What is the name given to winds blowing from sub-tropical high pressure regions, to the equator?

1. Westerlies
2. Tropical easterlies
3. High breadth easterlies
4. Doldrums

Reply (Detailed Solution Below)

Option 2 : Tropical easterlies

The correct respond is Tropical easterlies .

Key Points

• The Planetary winds that blow from the subtropical high-pressure belts to the equator are known equally Merchandise winds.
• Tropical Easterlies:
  • From 0-xxx degrees latitude, are also called Trade Winds.
  • The trade winds were named by the crews of sailing ships that depended on the winds during westward body of water crossings.

Additional Information

• Doldrums are formed in the equatorial belt of low atmospheric pressure where the North-East and South-E trade winds converge on and meet each other, forming calms and lite surface winds and a strong upward air movement.
• Westerlies – These are prevailing winds that flowfrom the west towards the due east. It flows in the Globe'southward middle latitudes between 30 and 60 degrees latitude.
  • Also called anti-trades, these winds originate from the high-pressure level areas in the horse latitudes and trend towards the poles and steer extratropical cyclones in this general manner.

Important Points

• Atmospheric Pressure level belts are seasonally identical horizontal pressure level variations created in the world's atmosphere only to a higher place the world's surface due to seasonal and spatial variation of free energy received past the earth at dissimilar places.
• There aresevenforce per unit area belts on the earth's surface. They are the Equatorial Low, the ii Subtropical highs, the 2 Subpolar lows, and the two Polar highs. Except for the Equatorial depression,the others class matching pairs in the Northern and Southern Hemispheres.

​ Equatorial Low-Pressure Belts

• It is located on either side of the North and South of the Equator in a zone extending from0o  to 5o.
• It is thermally induced because of theintense heatingof the ground by thevertical rays of the sun.
• It represents the zone convergence of North-E and South-Eastward trade winds. This convergence zone is characterized by calorie-free and feeble winds and considering of the frequent at-home weather condition, this belt is also called abelt of calm or doldrums.

Subtropical High-Pressure Belts

• It extends betweenthirtyo to 35o  both the hemisphere
• It is not thermally induced only dynamically induced as it owes its origin to the rotation of the world and sinking and settling down of winds.
• Here the zone convergence of winds at a higher altitude to a higher place this zone results in the subsidence of air from higher altitudes and this wind results in high pressure level. This zone of high pressure is also called theHorse latitude.
• The permanent winds blowing from the Sub-Polar High-Force per unit area to Sub-Polar Low-Pressure in both the hemisphere are calledWesterlies.

Sub-Polar Low-Pressure Belts

• Information technology extends betweensixtyo and 65o  in both hemispheres.
• The low-pressure belt does non thermally induce because there is low temperature throughout the year and as such there should have been a high-pressure chugalug instead of low pressure.
• Pressure gradient, rotation of the globe and Coriolis forcefulness, centrifugal activeness of air current are the cistron that controls the air motion.
• This region is marked byviolent storms in wintertime.

Polar High-Pressure Belts

• Polar high pressure is very small in area and extends between70o to xco in both the hemisphere.
• The temperatures are always extremely low.
• The Polar regions experience very cold climatic weather due to the rays of the sun is extremely slanting.
• These regions of Polar high-pressure level belts are known equally thePolar Highs.
• These regions are characterized bypermanent IceCaps.

Mark the correct order of pressure belts from the equator to the poles:

A. Equatorial Low Belt

B. Subtropical High Belt

C. Sub-polar Depression Belt

D. Polar Loftier Chugalug

Select the right answer from the options given below:

1. A, B, C, D
2. A, C, D, B
3. B, C, A, D
4. B, A, C, D

Answer (Detailed Solution Below)

Option 1 : A, B, C, D

The correct answer is A, B, C, D .

• The correct club of Pressure belts from the equator to the poles is Equatorial Low Belt, Subtropical High Belt, Sub-polar Low Belt, Polar High Chugalug.
• Subtropical high-pressure chugalug:
  • It extends from the tropics to well-nigh 35⁰ latitudes in both the hemispheres.
  • The ascending air of the equatorial region is deflected towards the poles due to the earth'southward rotation.
  • Afterwards becoming common cold and heavy, the air descends in these regions and gets piled up, which results in high pressure.
  • This zone is characterized by anti-cyclonic atmospheric condition, which lead to atmospheric stability and dehydration.
  • Wind in this zone is known equally tropical easterlies i.e northeast trade winds in the northern hemisphere and southeast trade winds in the southern hemisphere.
• ​Equatorial low-pressure level belt:
  • This belt extends from the equator to 10⁰ N and 10⁰ Southward latitudes.
  • The intertropical convergence zone (ITCZ) is known as the region of convergence nearly the equator because the winds flowing from subtropical high-force per unit area belts converge here.
  • This depression-pressure chugalug is also known as doldrums because it is a zone of total at-home without whatever winds.
  • Due to high temperatures, a low-pressure level belt is created in the equatorial region.
  • This gives rise to air convergence in the area.
• Sub Polar Depression-Force per unit area Belts:
  • They extend between 45⁰ N and 70⁰Northward in the northern hemisphere and between 45⁰ Due south and lxx0 N in the southern hemisphere.
  • Winds coming from the subtropical and the polar high belts converge here to produce cyclonic storms or depression-pressure conditions due to the formation of fronts.
  • This zone of convergence is too known as the polar front. This region is marked by violent storms in wintertime.
  • The winds developed in this region are called westerlies.
  • Depending on the latitudes, Westerlies are also known as Roaring Forties, Furious Fifties, and Shrieking Sixties.
• The polar high-force per unit area belt is located between 85°N to ninety°Northward and 85°S to 90°S.

Air Pressure Questions And Answers,

Source: https://testbook.com/objective-questions/mcq-on-pressure-and-pressure-belts--5eea6a1239140f30f369ed3f

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