Vayudoot Aviation

1. The process which to a large extent determines the vertical distribution of temperature in atmosphere is

Isothermal

Isentropic

Adiabatic

2. If ELR = SALR = DALR the atmosphere is

Stable

Instable

Indifferent

3. If ELR is less than SALR, the atmosphere is said to be

Absolutely unstable

Absolutely stable

Conditional unstable

4. DALR is approximately

10° C/km

15° C/km

5° C/km

5. SALR at mean sea level is about

10° C/Km

5° F/Km

5° C/Km

6. Inversion is _______ Lapse Rate (LR)

Negative

Positive

Neutral

7. Dry air is unstable when

ELR>DALR

ELR=DALR

ELR<DALR

8. An Isothermal atmosphere is

Unstable

Stable

Neutral

9. SALR approaches DALR

at -40° C

at 0° C

at - 15° F

10. The saturated air is said to be unstable if

SALR=ELR

SALR<ELR

SALR>ELR

11. Inversion is common in

Post Monsoon

Winters

Monsoon

12. DALR means

The rate at which ascending parcel of saturated air cools

The rate at which temp falls with height

The rate at which temperature of unsaturated parcel of air falls with height when to ascent adibetically

13. Environmental LR can be more than DALR

False

True

14. Dry air having a temperature of 35° C on surface when forced to rise adiabatically by 1 km would attain a temperature of

45° C

29° C

25° C

15. Inversion in the atmosphere indicates

Stability

Instability

Neutral

16. Rise in temperature with height is

Normal

Lapse

Inversion

17. DALR = 9.8 °C, ELR = 6.8 °C ; atmosphere is

unstable

indifferent

stable

18. DALR > ELR > SALR

conditionally unstable

latently stable

potentially stable

19. SALR = 5.5 °C, ELR = 4.5 °C ; atmosphere is

unstable

different

stable

20. Surface temp. is 30 °C. Assuming DALR what is the temperature of 2 km

10° C

42° C

18° C

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