Vayudoot Aviation

1. An Isothermal atmosphere is

Stable

Unstable

Neutral

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

Absolutely stable

Absolutely unstable

Conditional unstable

3. DALR means

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

The rate at which temp falls with height

4. Inversion is _______ Lapse Rate (LR)

Positive

Negative

Neutral

5. DALR > ELR > SALR

latently stable

potentially stable

conditionally unstable

6. The saturated air is said to be unstable if

SALR=ELR

SALR>ELR

SALR<ELR

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

Adiabatic

Isentropic

Isothermal

8. SALR approaches DALR

at -40° C

at - 15° F

at 0° C

9. Rise in temperature with height is

Lapse

Inversion

Normal

10. DALR is approximately

5° C/km

10° C/km

15° C/km

11. If ELR = SALR = DALR the atmosphere is

Indifferent

Instable

Stable

12. SALR at mean sea level is about

5° C/Km

10° C/Km

5° F/Km

13. Environmental LR can be more than DALR

False

True

14. Dry air is unstable when

ELR<DALR

ELR>DALR

ELR=DALR

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

18° C

42° C

10° C

16. Inversion is common in

Monsoon

Winters

Post Monsoon

17. Inversion in the atmosphere indicates

Neutral

Stability

Instability

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

unstable

indifferent

stable

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

different

stable

unstable

20. 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

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