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Question Bank
Questions for IC STABILITY
Answer the following questions
Test Mode
Training Mode
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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