# Atmospheric Pressure Flashcards

1
Q

Winds in a low pressure

A

》(a) Converge
(b) Diverge
(c) Go straight

2
Q

Low pressure is associated with

A

(a) Good Weather
(c) None

3
Q

In a high pressure area winds are

A

(a) Normal
(b) Strong
》(c) Weak

4
Q

Flying from Low to High an altimeter would read

A

(a) Over
》(b) Under
(c) constant

5
Q

Isallobars are lines of equal

A

(a) Pressure
(b) Temperature Tendency
》(c) Pressure Tendency

6
Q

What kind of a barometer is an altimeter

A

》(a) Aneroid
(b) Mercury
(c) Alcohol.

7
Q

A region between two Lows and Two Highs is

A

(a) Depression
(b)Secondary Low
》(c) Col

8
Q

Bad weather and better visibility is associated with

A

(a) High
》(b) Low
(c) Col

9
Q

The relationship between height and pressure is made use in construction of

A

》(a) Altimeter
(b) ASI
(C)VSI

10
Q

Altimeter always measure the height of aircraft above

A

(a) MSL
(b) datum of 1013.2 hPa
》(c) datum at which its sub-scale is set

11
Q

Two aircraft flying at same indicated altitude with altimeters set to 1013.2hPa.One is flying over cold air mass and other over warm air mass. Which of the two has greater altitude?

A

》(a) Ac flying over warm air mass (b) Ac flying over cold air mass

12
Q

The rate of fall of pressure with height in a warm air mass compared to cold air mass
will be

A

(a) Same
(b) More
》(c) Less

13
Q

An increase of 1000’ at msl is associated with decrease of pressure of

A

(a) 100 hPa
(b) 1000 hPa
(c) 3 hPa
》(d) 33 hPa

14
Q

Lines drawn through places of equal pressure are known as

A

》(a) Isobars
(b) Isotherms
(c) Isogonal
(d) Isoclinal

15
Q

Which is true?
(a) Trough has frontal characteristics
(b) At trough winds back in N-hemisphere
(c) At trough winds veer in N-hemisphere

A

(a) Trough has frontal characteristics
》(b) At trough winds back in N-hemisphere
(c) At trough winds veer in N-hemisphere

16
Q

Semi diurnal pressure changes are most pronounced in

A

(a) Polar region
(b) Middle latitudes
》(c)Tropics

17
Q

Flying from Delhi to Kolkata at constant indicated altitude but, experiencing drift to Starboard. The actual altitude will be (vis-à-vis) indicated altitude

A

》(a) Lower
(b) Same
(c) Higher

18
Q

In the Southern Hemisphere, around a Low Pressure Area wind blows

A

》(a) In clockwise direction
(b) In anticlockwise direction
(c) Across isobars towards the centre

19
Q

Q19. Altimeter of a/c on ground reads aerodrome elevation; its sub-scale is set to

A

》(a) QNH
(b) QNE
(c) QFF
(d) QFE

20
Q

Instrument for recording pressure is called

A

(a) Anemograph
》(b) Barometer
(c)Hygrograph

21
Q

Poor visibility is associated with

A

》(a) High
(b) Low
(c) Trough

22
Q

On either side, perpendicular to the……. pressures rise

A

》(a) Trough
(b) Ridge
(c) Low

23
Q

Fall of pressure with height is more rapid in
(a) Cold areas
(b) Warm areas
(c) Humid areas

A

》(a) Cold areas
(b) Warm areas
(c) Humid areas

24
Q

300 hPa in ISA corresponds to the level

A

(a) 20,000 ft
》(b) 30,000 ft
(c) 35,000 ft

25
Q

18,000 ft height in ISA corresponds to the pressure level

A

(a) 700 hPa
(b) 200 hPa
》(c) 500 hPa

26
Q

200 hPa in ISA corresponds to the level

A

(a) 20,000 ft
(b) 30,000 ft
》(c) 40,000 ft

27
Q

24,000 ft height in ISA corresponds to pressure level

A

》(a) 400 hPa
(b) 500 hPa
(c) 300 hPa

28
Q

700 hPa in ISA corresponds to the Flight level

A

(a) 20,000Oft
》(b) 10,0000 ft
(c) 18,000 ft

29
Q

40,000 ft height in ISA approximately corresponds to pressure level

A

(a) 400 hPa
(b) 500 hPa
》(c) 200 hPa

30
Q

850 hPa in ISA corresponds to the height

A

(a) 7,000 ft
》(b) 5,000 ft
(c) 10,000 ft

31
Q

Atmospheric pressure is due to

A

(a) wind
(b) temperature
(c) gravity
》(d) density

32
Q

An aircraft is gaining altitude, inspite of altimeter reading constant altitude. Why?

A

(a) Standard pressure has risen
》(b) Flying towards High
(c) Flying towards Low
(d) Temperature has decreased

33
Q

A contour of 9160 m can be expected on a constant pressure chart for pressure level

A

(a) 500 hPa
(b) 400 hPa
》(c) 300 hPa
(d) 200 hPa

34
Q

In contour chart of 300 hPa, isohypse (contours) are drawn at interval of

A

(a) 20 gpm
(b) 40 gpm
(c) 60 gpm
》(d) 80 gpm

35
Q

In constant pressure chart of 500 hPa, isohypse are drawn at interval of

A

(a) 20 gpm
》(b) 40 gpm
(c) 60 gpm
(d) 80 gpm

36
Q

QNH of an aerodrome 160 m AMSL is 1005 hPa. QFE? Assuming 1 hPa -8m

A

(a) 1010 hPa
》(b) 985 hPa
(c)1005 hPa
(d) 990 hPa

37
Q

A

(a) Contours far apart, weak wind (b) Contours far apart ,strong wind
(c) Isobars far apart and temperature low
》(d) Isobars closely packed and strong wind

38
Q

What type of inversion occurs when a stable layer lies in a high pressure area

A

(a) Negative
》(c) Subsidence
(d) Airmass

39
Q

Which of the following would cause true altitude to increase when altimeter indicates constant altitude?

A

(a) Warm/ Low
(b) Cold/ Low
》(c) Hov High
(d) Cool/ Low

40
Q

The movement of wind in relation to a cyclone is

A

(a) Descending and subsiding
》(b) Ascending and converging
(c) Descending and cooling
(d) Ascending and diverging