AIR MASSES, FRONTS AND WESTERN DISTURBANCES

1.       The air mass which originates at sea in low Latitudes is called

a.    Polar maritime

b.      Tropical continental

c.      Tropical maritime

2.       The air mass which originates over equatorial region is

a.      Warm & dry

b.    Warm & Moist

c.      Cold & dry

3.       If the advancing cold front is colder than the cool air mass of the warm front, the advancing cold front undercuts and lifts both the warm and cool air masses  of the warm front. This is

a.    Warm Occlusion

b.      Cold Occlusion

4.       The airmass which originated over land area located in polar region:

a.      Warm & dry

b.      Warm & Moist

c.    Cold & dry

5.       If a warm airmass overtakes a cold air mass, it is called

a.      Cold Front

b.    Warm Front

c.      Occluded Front

6.       At warm front

a.    Warm air overtakes the cold air

b.      Cold air undercuts the warm air

7.       The conditions are always unstable at

a.    Cold front

b.      Warm front

8.       Line squall occurs about 100-300 km ahead of

a.      Warm front

b.    Cold front

9.       Precipitation occurs over a belt of 30 - 50 km on both side of front

a.    Cold front

b.      Warm front

10.   Cold front moves at ... the speed of a warm front moves

a.      Same

b.    Double

c.      Half

11.   Line Squalls occur  of Cold front

a.    Ahead

b.      Behind

c.      At the

12.   Fronts are associated with

a.      Tropical cyclone

b.      Monsoon Depression

c.    Extra-tropical Cyclones

13.   CB, Roll-type clouds, SC, AC with embedded CB are associated

a.    Cold front

b.      Warm front

14.   The Surface of discontinuity between the Polar Easterlies and the temperate Westerlies is called

a.      Equatorial Front

b.      Tropopause

c.    Polar Front

15.   The air mass which origir>ates from sea area located in lower Lat is

a.      Warm & Dry

b.      Warm & Moist

c.    Cold & Moist

16.   WDs approach India as

a.      Cols

b.    Occluded Fronts

c.      Highs

17.   Maximum WDs occur in

a.      Summers

b.      Post Monsoon

c.    Winters

18.   Ahead of a warm front the surface wind

a.      Backs & weakens

b.      Veers & strengthens

c.    Backs & strengthens

19.   On approach of a Warm Front temperature

a.      Fall

b.    Rise

c.      Remain same

20.   CI, CS, AS, NS, ST in sequence are associated with the front

a.    Warm

b.      Cold

c.      Occluded

21.   During the passage of a Cold Front winds

a.    Suddenly become squally

b.      Back and weaken

c.      Veer and are of moderate strength

22.   Visibility is poor in a Warm Front

a.      Ahead

b.    Ahead & During

c.      After & During

23.   Fog occurs in Cold Front

a.      Ahead

b.      During

c.    After

24.   WD is a……….. front

a.    Cold

b.      Warm

c.      Occluded

25.   FZRA and FZFG occur          of a warm front

a.    Ahead

b.      During

c.      After

26.   Precipitation ceases after the passage of a front

a.      Cold         

b.     Warm

c.      Occluded

27.   During the approach of a Warm Front wind

a.    Backs

b.      Veers

c.      Does not change

28.   Whenever the low of a WD has two or more closed isobars, at 2 hPa interval, it is termed as

a.      Troughs in Westerlies

b.    Western Depression

c.      Western Cyclone