STABILITY – Air – DGCA Question Bank For Politics

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

stable

unstable

indifferent

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

unstable

stable

different

#3. DALR > ELR > SALR

conditionally unstable

latently stable

potentially stable

#4. Dry air is unstable when:

ELR=DALR

ELR>DALR

ELR<DALR

#5. The saturated air is said to be unstable if

SALR=ELR

SALR<ELR

SALR>ELR

#6. If ELR = SALR = DALR the atmosphere is

Stable

Instable

Indifferent

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

18° C

10° C

42° C

#9. An Isothermal atmosphere is:

Stable

Unstable

Neutral

#10. If ELR is less than SALR, the atmosphere is said to be:

Absolutely unstable

Conditional unstable

Absolutely stable

#11. DALR is approximately

5° C/km

15° C/km

10° C/km

#12. SALR at mean sea level is about

10° C/Km

5° C/Km

5° F/Km

#13. SALR approaches DALR

at 0° C

at - 15° F

at -40° C

#14. 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

#15. Inversion in the atmosphere indicates

Stability

Instability

Neutral

#16. Inversion is _______ Lapse Rate (LR)

Positive

Negative

Neutral

#17. Environmental LR can be more than DALR

True

False

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

Adiabatic

Isothermal

Isentropic

#19. Rise in temperature with height is

Inversion

Lapse

Normal

#20. Inversion is common in

Post Monsoon

Monsoon

Winters

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Results

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

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

#3. DALR > ELR > SALR

#4. Dry air is unstable when:

#5. The saturated air is said to be unstable if

#6. If ELR = SALR = DALR the atmosphere is

#7. DALR means:

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

#9. An Isothermal atmosphere is:

#10. If ELR is less than SALR, the atmosphere is said to be:

#11. DALR is approximately

#12. SALR at mean sea level is about

#13. SALR approaches DALR

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

#15. Inversion in the atmosphere indicates

#16. Inversion is _______ Lapse Rate (LR)

#17. Environmental LR can be more than DALR

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

#19. Rise in temperature with height is

#20. Inversion is common in