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  1. Why do birds not have respiratory trouble at the time of flying at high altitude ?

  2. A.

     Their lungs are very large

    B.

     They fly inactively

    C.

     They have extra air sacs

    D.

     They use less oxygen

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  3. When a barometer reading suddenly recedes, it indicates that climate–

  4. A.

     Will be very warm

    B.

     Will be extremely stormy

    C.

     Will remain cold

    D.

     Incessant rain for at least 48

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  5. When a barometer is rising air pressure is

  6. A.

     Increasing

    B.

     Decreasing

    C.

     Constant

    D.

     Zero

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  7. The pressure exerted by a 760 mm column of mercury at 0°C is known as

  8. A.

     1 pascal

    B.

     1 atmosphere

    C.

     1 bar

    D.

     1 poise

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  9. If a barometric reading is falling, this usually indicates what

  10. A.

     Increasing pressure

    B.

     Decreasing pressure

    C.

     No pressure

    D.

     None

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  11. Reading of a barometer going down is an indication of

  12. A.

     Storm

    B.

     Rainfall

    C.

     Snow

    D.

     Intense heat

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  13. Increased wind speed is accompanied by a reduced air ________

  14. A.

     Humidity

    B.

     Pressure

    C.

     Density

    D.

     Aridity

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  15. A vacuum cleaner works on the principle of pressure difference. On the moon it will

  16. A.

     Work as efficiently as on the earth

    B.

     Not work at all

    C.

     Work with reduced efficiency

    D.

     Work with increased efficiency

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  17. Middle latitude cyclones are fueled by?

  18. A.

     Air high in the atmosphere

    B.

     Polar continental air masses

    C.

     Energy from falling precipitation

    D.

     All of the above

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  19. Skating on ice is possible because

  20. A.

     The surface of ice is smooth

    B.

     Ice is cold

    C.

     The pressure on the ice due to skate melts the ice by lowering its melting point forming a thin film of water

    D.

     The pressure on the ice due to skate raises its melting point

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