Wind

1.       In S hemisphere if an observer faces wind, low will be to his

a.      Right

b.    Left

2.       In N hemisphere due to rotation of earth winds are deflected to

a.      Left

b.    Right

3.       Local Winds follow Buys Ballots law

a.    False

b.      True

4.       Coriolis force acts perpendicular towards             of wind direction

a.      Left

b.    Right

5.       Geostrophic wind is due to the balance between the forces

a.      Coriolis and Friction

b.      Pressure gradient and Cyclostrophic

c.    Pressure gradient and Coriolis

6.       Coriolis force is strongest at

a.      Mid latitudes

b.    Poles

c.      Equator

7.       Geostrophic rule breaks down at

a.      Mid latitudes

b.      Poles

c.    Equator

8.       Fohn winds are       on the Leeward side of a mountain,

a.    Dry &Warm

b.      Cold & Humid

9.       The wind sliding down a hill during night is called             wind.

a.      Fohn

b.      Anabatic

c.    Katabatic

10.   With the onset of sea breeze there is a      in temperature and      in RH.

a.    Fall/Rise

b.      Rise/Fall

c.      Fall/Fall

11.   Sea breeze sets in by          and dies off at

a.      Night/Day

b.    Day/Night

c.      Both Day and Night

12.   If an aircraft in N-hemisphere flies from H to L it will experience

a.    Starboard drift

b.      Port drift

13.   In N-Hemisphere if you experience Port drift , altimeter will read

a.    Under

b.      Over

14.   Lines of constant wind speed drawn on weather charts are called

a.      Isobars

b.    Isotachs

c.      Isogons

15.   Squall are distinguished from gusts by:

a.      Shorter duration

b.    Longer duration

c.      Lower wind speed

16.   The thermal wind is:

a.      The wind that blows because of thermals

b.      The warm wind that blows down the hül on the leeward side

c.    The wind which must be added vectorilly to the lower level geostrophic wind to obtain the upper level geostrophic wind

17.   On a weather map where isobars are closely packed, the surface winds are likelyto be

a.      Light and parallel to isobars

b.    Strong and parallel to isobars

c.      Strong and blowing acros theisobars

18.   Anabatic wind occurs

a.      At night

b.      Any time of day and night

c.    During day

19.   Anabatic wind is stronger than katabatic

a.      True

b.    False

20.   Katabatic wind is down slope cold wind due to nocturnal cooling

a.    True

b.      False

21.   Katabatic wind occur due to sinking of air down the hill slope

a.    True

b.      False

22.   Anabatic wind occur due to downward movement of air along valley

a.      True

b.    False

23.   Sea breeze is stronger than land breeze

a.    True

b.      False

24.   The wind blows clockwise around low in a N-hemisphere

a.      True

b.    False

25.   The wind blows clockwise around low in S-hemisphere

a.    True

b.      False

26.   The wind blows anticlockwise around low in N-hemisphere

a.    True

b.      False

27.   The wind blows anticlockwise around low in S- hemisphere

a.      True

b.    False

28.   The resultant wind that blows under the influence of pressure gradient force, geostrophic force and cyclostrophic force is called

a.    Gradient wind

b.      Geostrophic wind

29.   Due to friction, from day to night for an isobaric pattern (in N hemisphere) Surface wind backs and lulls

a.    True

b.      False

30.   The winds which spiral inward in a counter-clockwise direction in the NH are associated with

a.      Turbulence

b.      High pressure area

c.    Low pressure area

31.   Lower level wind 05010 kt, upper level wind 23005 kt, what is the thermal wind

a.      05005 kt

b.    23015 kt

c.      05015 kt

32.   A change in wind direction from 310° to 020° is

a.      Backing

b.    Veering

33.   A change from 270° to 250° is

a.    Backing

b.      Veering

34.   Sudden change in wind speed from 10 kt to 30 kt and then to 15 kt is

a.    Gust

b.      Squall

35.   Sudden change in wind speed from 10 kt to 30 kt for more than a minute or so is

a.    Squall

b.      Gust

36.   A significant wind shear can be associated with TS or line squall

a.      False

b.    True

37.   Cyclostrophic wind gives a good approximation of the 2000' wind in an intense tropical storm

a.    True           

b.       False

38.   Rotor clouds have extremely turbulent flying conditions

a.      False

b.    True

39.   Friction causes winds to flow cross isobaric by      over land and .... over sea

a.    30/15°

b.      20/30°

c.      40/30°

40.   If temperature is higher to the S and lower to the N from surface up to higher     levels , then the           wind will strengthen with height with no change in             direction in N hemisphere

a.      Ely

b.    Wly

c.      Sly

d.      Nly

41.   Gradient wind is     of geostrophic wind in an anticyclone

a.      Under estimate

b.      Accurate

c.    Over estimate

42.   Gale is

a.      persistent strong winds with mean speed 44 kt, associated with thunderstorm

b.      marked increase in wind speed lasing few minutes associated with CB or dust storm

c.    persistent strong winds exceeding 33 kt, associated with depression

43.   In N hemisphere thermal wind is parallel to ...with low value to left

a.      Isobars

b.    Isotherms

c.      Isallobars