Vayudoot Aviation

1. DALR > ELR > SALR

potentially stable

latently stable

conditionally unstable

2. An Isothermal atmosphere is

Neutral

Unstable

Stable

3. SALR at mean sea level is about

5° C/Km

5° F/Km

10° C/Km

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

Isothermal

Isentropic

Adiabatic

5. Dry air is unstable when

ELR>DALR

ELR=DALR

ELR<DALR

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

Conditional unstable

Absolutely unstable

Absolutely stable

7. DALR means

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

The rate at which temp falls with height

The rate at which ascending parcel of saturated air cools

8. Environmental LR can be more than DALR

False

True

9. DALR is approximately

10° C/km

5° C/km

15° C/km

10. Inversion is _______ Lapse Rate (LR)

Negative

Neutral

Positive

11. The saturated air is said to be unstable if

SALR=ELR

SALR>ELR

SALR<ELR

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

stable

indifferent

unstable

13. Rise in temperature with height is

Normal

Inversion

Lapse

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

42° C

10° C

18° C

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

29° C

25° C

45° C

16. SALR approaches DALR

at - 15° F

at -40° C

at 0° C

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

unstable

different

stable

18. Inversion is common in

Monsoon

Winters

Post Monsoon

19. Inversion in the atmosphere indicates

Neutral

Instability

Stability

20. If ELR = SALR = DALR the atmosphere is

Indifferent

Instable

Stable

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