Vayudoot Aviation

1. SALR at mean sea level is about

5° C/Km

5° F/Km

10° C/Km

2. Inversion in the atmosphere indicates

Instability

Stability

Neutral

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

Absolutely stable

Absolutely unstable

Conditional unstable

4. SALR approaches DALR

at -40° C

at - 15° F

at 0° C

5. The saturated air is said to be unstable if

SALR<ELR

SALR>ELR

SALR=ELR

6. 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

25° C

29° C

7. Environmental LR can be more than DALR

False

True

8. DALR means

The rate at which temp falls with height

The rate at which ascending parcel of saturated air cools

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

9. Dry air is unstable when

ELR<DALR

ELR=DALR

ELR>DALR

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

unstable

stable

different

11. DALR > ELR > SALR

potentially stable

latently stable

conditionally unstable

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

stable

unstable

indifferent

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

10° C

42° C

18° C

14. DALR is approximately

5° C/km

15° C/km

10° C/km

15. Rise in temperature with height is

Normal

Lapse

Inversion

16. Inversion is _______ Lapse Rate (LR)

Negative

Positive

Neutral

17. If ELR = SALR = DALR the atmosphere is

Instable

Stable

Indifferent

18. Inversion is common in

Post Monsoon

Winters

Monsoon

19. An Isothermal atmosphere is

Unstable

Stable

Neutral

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

Adiabatic

Isentropic

Isothermal

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