Wed. Jan 8th, 2025

Atmospheric Pressure and Motion

  1. The pressure gradients in the southern hemisphere are recorded steeper in the month of

    Options:
    1. July
    2. June
    3. January
    4. December

    Option: A

  2. Which of the following pressure belts does not move during summer or winter solstice

    Options:
    1. Polar High-Pressure Belt
    2. Sub-Tropical High-Pressure Belt
    3. Sub-Polar Low Pressure
    4. Equatorial Low Pressure Belt

    Option: A

  3. The atmosphere is a

    Options:
    1. Pure gas
    2. Turbulent fluid
    3. Solid
    4. Pure fluid

    Option: B

  4. Which of the following forces are responsible for the functioning of air motion

    1. Pressure gradient force
    2. Coriolis force
    3. Frictional force
    4. Rotational force
    Options:
    1. 1 and 2
    2. 1, 3 and 4
    3. 2, 3 and 4
    4. All of the above

    Option: D

  5. The difference of pressure between two places is called

    Options:
    1. Gradient
    2. Wind
    3. Pressure gradient
    4. Air pressure

    Option: C

  6. Which one of the following statements is not correct

    Options:
    1. Air movement follows barometric slope
    2. The rate of air movement depends on the steepness of gradient
    3. The wind direction is also dependent on the direction of pressure gradient
    4. The rate of air movement does not depends on the steepness of gradient

    Option: D

  7. Which one of the following statements is not correct

    Options:
    1. The steeper the pressure gradient, the higher the rate of air movement
    2. The lower the pressure gradient, the slower the wind speed
    3. The lower the pressure gradient, the higher the wind speed
    4. The direction of pressure gradient is remains perpendicular to the isobars

    Option: C

  8. The winds cross the isobars at acute angle instead of right angle because of

    Options:
    1. Pressure gradient force
    2. Never crosses at acute angle
    3. Frictional force
    4. Coriolis force

    Option: D

  9. When the upward pressure gradient force is balanced by downward acting gravity force, the vertical air movement becomes zero. This situation of balance is called

    Options:
    1. Hydrostatic equilibrium
    2. Vertical equilibrium
    3. Thermal equilibrium
    4. None of the above

    Option: A

  10. The force which deflects the direction of winds is called

    Options:
    1. Coriolis force
    2. Deflection force
    3. Frictional force
    4. Both a and b

    Option: D

  11. Who observed and explained the process of deflection in wind direction for the first time

    Options:
    1. G.G. Coriolis
    2. B.G. Coriolis
    3. G.B. Coriolis
    4. B.B. Coriolis

    Option: A

  12. Which of the following are the characteristics of Coriolis Force (Effect)

    1. It becomes effective on any object which is in motion
    2. Coriolis force affects wind direction and not the wind speed
    3. The magnitude of Coriolis force is determined by wind speed
    4. It becomes maximum at the poles due to minimum! rotational speed to the earth while it becomes zero at the equator
    Options:
    1. 1, 2 and 4
    2. 2, 3 and 4
    3. 1 and 3
    4. All of the above

    Option: D

  13. Which of the following characteristics of Coriolis Force (Effect) is/are correct

    1. The higher the wind Speed the greater is the deflection of wind direction due to resultant greater the Coriolis force.
    2. Coriolis force deflect winds to the right in the northern hemisphere and to the left in the southern hemisphere
    3. The magnitude of Coriolis force is determined by wind speed
    Options:
    1. 1 and 2
    2. 2 and 3
    3. 1 and 3
    4. All of the above

    Option: D

  14. The magnitude of Coriolis effects is directly proportional to the

    Options:
    1. The mass of the moving body
    2. Horizontal velocity of the wind
    3. The sine of the latitude
    4. All of the above

    Option: D

  15. Which one of the following statements is not correct

    Options:
    1. The earth rotates from west to east
    2. Every latitude is a complete circle
    3. Equatorial latitudinal circle is the largest
    4. The rotational speed of the Earth is the lowest at the equator

    Option: D

  16. The force generated by the resistance of the surface of an object against a moving object is called

    Options:
    1. Coriolis force
    2. Deflection force
    3. Frictional force
    4. Both a and b

    Option: C

  17. Which of the following characteristics of frictional force is/are correct

    1. The frictional force works in opposition to the pressure gradient force
    2. The magnitude of frictional force depends upon the degree of roughness of the surface over which winds blow
    3. The zone to lower atmosphere where frictional force becomes effective is called friction layer
    Options:
    1. 1 and 2
    2. 2 and 3
    3. 1 and 3
    4. All of the above

    Option: D

  18. Over the water surfaces of the seas and oceans the horizontal winds cross the isobars at the angle of

    Options:
    1. 45°
    2. 10° - 20°
    3. 35°
    4. 40°

    Option: B

  19. At the ground surface the horizontal winds cross the isobars at the angle of

    Options:
    1. 45°
    2. 10° - 20°
    3. 35°
    4. 40°

    Option: A

  20. Due to the frictional force, the velocity of wind over oceanic surface, is reduced by

    Options:
    1. 65 percent
    2. 35 percent
    3. 45 percent
    4. 40 percent

    Option: B