Stability and Instability Of Atmosphere

Question 1

DALR = 9.8°C ELR = 6.8 °C atmosphere is

Answer 1

> (a) stable
(b) unstable
(c)indifferent

Question 2

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

Answer 2

(a) unstable
>(b) stable
(c)indifferent

Question 3

DALR > ELR > SALR

Answer 3

> (a) conditionally unstable
(b) latently stable
(c) potentially stable

Question 4

Dry air is unstable when:

Answer 4

(a) ELR=DALR
>(b) ELR>DALR
(c) ELR<DALR

Question 5

The saturated air is said to be unstable if

Answer 5

(a) SALR=ELR
>(b) SALR<ELR
(c) SALR > ELR

Question 6

If ELR = SALR = DALR the atmosphere is

Answer 6

(a) Stable
(b) Instable
>(c) Indifferent

Question 7

DALR means:

Answer 7

> (a)The rate at which temperature of unsaturated parcel of air falls with height when made to ascend adiabatically
(b)The rate at which temp falls with height
(c)The rate at which ascending parcel of saturated air cools

Question 8

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

Answer 8

(a)18°C
>(b) 10°C
(c) 42°C

Question 9

An Isothermal atmosphere is:

Answer 9

> (a)Stable
(b) Unstable
(c) Neutral

Question 10

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

Answer 10

(a)Absolutely unstable
(b) Conditionally unstable
>(c) Absolutely stable

Question 11

DALR is approximately

Answer 11

(a) 5° C/km
(b) 15°C/km
>(c) 10°C/km

Question 12

SALR at mean sea level is about

Answer 12

(a) 10° C/Km
>(b)5°C/Km
(b)5°F/Km

Question 13

SALR approaches DALR

Answer 13

(a) at 0°C
(b)at -15°F
>(c)at -40°C

Question 14

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

Answer 14

(a) 29 °C
>(b) 25 °C
(c) 45 °C

Question 15

Inversion in the atmosphere indicates

Answer 15

> (a) Stability
(b)Instability
(c)Neutrality

Question 16

Inversion is ……… lapse rate

Answer 16

(a) Positive
>(b)Negative
(c)Neutral

Question 17

Environmental LR can be more than DALR

Answer 17

> (a)True
(b)False

Question 18

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

Answer 18

> (a) Adiabatic
(b) Isothermal
(c) Isentropic

Question 19

Rise in temperature with height is

Answer 19

> (a) Inversion
(b) Lapse
(c) Normal

Question 20

Inversion is common in

Answer 20

(a) Post Monsoon
(b) Monsoon
>(c) Winters