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ATMOSPHERE + ATMOSPHERIC PRESSURE

Total questions: 86

Worksheet time: 43mins

Name
Class
Date
1.

Lowest layer of atmosphere is ...

a)

Troposphere

b)

Tropopause

c)

Stratosphere

2.

Height of Tropopause at equator is .........

a)

10-12 km

b)

16-18 km

c)

12-14 km

3.

Height of Tropopause at Poles is

a)

12-14 km

b)

12-13 km

c)

08-10 km

4.

Higher the surface temperature

a)

Higher

b)

Lower

c)

Same

5.

Height of tropopause

a)

Is constant

b)

Varies with altitude

c)

Varies with latitude

6.

Above 8 km the lower temperatures are over ...........

a)

Equator

b)

Mid Latitudes

c)

Poles

7.

Atmosphere is heated by

a)

Solar Radiation

b)

Heat from earth surface

c)

From above

8.

Tropos means

a)

Turning

b)

Under current

c)

Convection

9.

CO2 and H2O are also called

a)

Green House Gases

b)

Rare Earth Gases

10.

Troposphere is generally

a)

Stable

b)

Unstable

c)

Neutral

11.

Stratosphere is

a)

Unstable

b)

Neutral

c)

Stable

12.

Tropopause is discontinuous at about

a)

30°lat

b)

40°lat

c)

80°lat

13.

Most of atmospheric mass is contained in

a)

Troposphere

b)

Stratosphere

c)

Heterosphere

14.

Stratosphere extends from Tropopause to

a)

50 km

b)

60 km

c)

40 km

15.

The middle atmosphere layer with temperature inversion and stability is

a)

Troposphere

b)

Tropopause

c)

Stratosphere

16.

Mother of Pearl clouds occur in

a)

Mesosphere

b)

Thermosphere

c)

Stratosphere

17.

The temperature in ISA at 17 km is

a)

-56.5°C

b)

-65.5°C

c)

35.5°C

18.

By weight, approximate ratio of Oz to Nz in the atmosphere is

a)

1:3

b)

1:4

c)

1:5

19.

By volume, the approximate ratio of Oz to Nz in the atmosphere is

a)

1:3

b)

1:4

c)

1:5

20.

By volume, the proportion of CO₂ in the atmosphere is

a)

3%

b)

0.3%

c)

0.03%

21.

In ISA, the mean sea level temperature is

a)

15°C

b)

10°C

c)

25°C

22.

Maximum concentration of ozone is at a height of

a)

10-15 km

b)

20 - 25 km

c)

30-35 km

23.

Additional oxygen is needed while flying above:

a)

5000 ft

b)

7000 ft

c)

10000 ft

24.

CO2 and H2O keep the atmosphere:

a)

Warm

b)

Cold

c)

Have no effect

25.

Noctilucent clouds occur in:

a)

Thermosphere

b)

Mesosphere

c)

Stratosphere

26.

Temperature at 2 km is 05°C. What is ISA deviation? (Actual - ISA)

a)

-05°C

b)

-02°C

c)

03°C

27.

Pressure at MSL is 1002.25 hPa. Find the ISA deviation (Actual - ISA):

a)

-11 hPa

b)

10 hPa

c)

12 hPa

28.

In actual atmosphere, temp. at 19 km is -60°C. Find the ISA deviation:

a)

4.5°C

b)

-05.5°C

c)

-03.5°C

29.

Nacreous clouds occur in:

a)

Thermosphere

b)

Mesosphere

c)

Upper Stratosphere

30.

The atmosphere up to 80 km has a nearly similar composition and is called the Homosphere. Its uniform composition is due to:

a)

Pressure

b)

Gravitation of earth

c)

Mixing due to turbulence

31.

Half of the atmospheric air mass is contained below:

a)

10-15 km

b)

20-25 km

c)

30-35 km

32.

In jet standard atmosphere, the Lapse Rate is

a)

2°C/1000 ft

b)

2°C/km

c)

5°C/km

d)

10°C/km

33.

The rate of fall of temperatures with height is called

a)

Isothermal rate

b)

Inversion Rate

c)

Lapse Rate

d)

Temperature Gradient

34.

In actual atmosphere, the lapse rate could

a)

Assume any value

b)

Fall up to 8 km

c)

Rise up to 50 km

d)

Remain constant

35.

Tropical Tropopause extends from the equator to Lat. 35°- 40°. Over India, it is at

a)

20-21 km

b)

14-15 km

c)

16-16.5 km

36.

Lapse rate in the troposphere is produced by... and in the stratosphere by...

a)

Evaporation; condensation

b)

Rising air; solar radiation

c)

Terrestrial radiation; solar radiation

d)

Solar radiation; convection

37.

Most of the water vapour in the atmosphere is confined up to

a)

Stratosphere

b)

30,000 ft

c)

Mid troposphere

d)

Lower troposphere

38.

Negative lapse rate of temperature is

a)

Isothermal rate

b)

Temperature rise with lowering height

c)

Temperature rise with height

d)

Temperature fall with height

39.

In ICAO ISA, the atmosphere is assumed to be isothermal

a)

In stratosphere

b)

11 to 16 km

c)

11 to 20 km

d)

11 to 32 km

40.

One of the characteristics of our atmosphere is

a)

Poor conductor of heat and electricity

b)

Equator is warmer than poles above 10 km

c)

Lapse rate in the stratosphere is positive

d)

Density is constant above 8 km

41.

Heat transfer in the atmosphere is maximum due to

a)

Convection

b)

Radiation

c)

Sensible heat

d)

Latent heat

42.

The knowledge of the height of tropopause is important for a pilot because

a)

Weather is mainly confined up to this level

b)

Clouds rarely reach up to this height due to jetstreams

c)

Stratosphere starts at this height where all solar radiation are absorbed

43.

In ISA atmosphere the tropopause occurs at a height of

a)

8 - 10 km

b)

11 km

c)

16-18 km

44.

Most of the transfer of heat in the atmosphere is due to

a)

Conduction and freezing

b)

Convection and evaporation

c)

Condensation, sublimation and freezing

d)

Sublimation and radiation

45.

There is reversal of temperature in the atmosphere at 8 km because

a)

Lapse rate at poles is always higher than at equator

b)

Lapse rate at equator is always higher than at poles

c)

Lapse rate at equator is the same as at poles even above the poles

d)

Lapse rate reverses at poles and becomes negative

46.

Winds in a low pressure

a)

Converge

b)

Diverge

c)

Go straight

47.

Low pressure is associated with

a)

Good Weather

b)

Bad Weather

c)

None

48.

In a high pressure area winds are

a)

Normal

b)

Strong

c)

Weak

49.

Flying from Low to High an altimeter would read

a)

Over

b)

Under

c)

Constant

50.

Isallobars are lines of equal

a)

Pressure

b)

Temperature Tendency

c)

Pressure Tendency

51.

What kind of a barometer is an altimeter

a)

Aneroid

b)

Mercury

c)

Alcohol

52.

A region between two Lows and Two Highs is

a)

Depression

b)

Secondary Low

c)

Col

53.

Bad weather and better visibility is associated with

a)

High

b)

Low

c)

Col

54.

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

a)

Altimeter

b)

ASI

c)

VSI

55.

Altimeter always measures the height of aircraft above

a)

MSL

b)

Datum of 1013.2 hPa

c)

Datum at which its sub-scale is set

56.

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

a)

Ac flying over warm air mass

b)

Ac flying over cold air mass

57.

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

a)

Same

b)

More

c)

Less

58.

An increase of 1000 ft at ms is associated with decrease of pressure of

a)

100 hPa

b)

1000 hPa

c)

3 hPa

d)

33 hPa

59.

Lines drawn through places of equal pressure are known as

a)

Isobars

b)

Isotherms

c)

Isogonal

d)

Isoclinal

60.

Which is true?

a)

Trough has frontal characteristics

b)

At trough winds back in N-hemisphere

c)

At trough winds veer in N-hemisphere

61.

Semi diurnal pressure changes are most pronounced in

a)

Polar region

b)

Middle latitudes

c)

Tropics

62.

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

a)

Lower

b)

Same

c)

Higher

63.

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

a)

In clockwise direction

b)

In anticlockwise direction

c)

Across isobars towards the centre

64.

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

a)

QNH

b)

ONE

c)

QFF

d)

OFE

65.

Instrument for recording pressure is called

a)

Anemograph

b)

Barometer

c)

Hygrograph

66.

Poor visibility is associated with

a)

High

b)

Low

67.

On either side, perpendicular to the

a)

Trough

b)

Ridge

c)

Trough

68.

Fall of pressure with height is more rapid in

a)

Cold areas

b)

Warm areas

69.

300 hPa in ISA corresponds to the level

a)

20,000 ft

b)

30,000 ft

c)

35,000 ft

70.

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

a)

700 hPa

b)

200 hPa

c)

500 hPa

71.

200 hPa in ISA corresponds to the level

a)

20,000 ft

b)

30,000 ft

c)

40,000 ft

72.

24,000 ft height in ISA corresponds to pressure level

a)

400 hPa

b)

500 hPa

c)

300 hPa

73.

700 hPa in ISA corresponds to the Flight level

a)

20,000 ft

b)

10,000 ft

c)

18,000 ft

74.

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

a)

400 hPa

b)

500 hPa

c)

200 hPa

75.

850 hPa in ISA corresponds to the height

a)

7,000 ft

b)

5,000 ft

c)

10,000 ft

76.

Atmospheric pressure is due to

a)

wind

b)

temperature

c)

gravity

d)

density

77.

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

a)

Standard pressure has risen

b)

Flying towards High

c)

Flying towards Low

d)

Temperature has decreased

78.

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

a)

300 hPa

b)

200 hPa

c)

500 hPa

d)

400 hPa

79.

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

a)

20 gpm

b)

40 gpm

c)

60 gpm

d)

80 gpm

80.

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

a)

20 gpm

b)

40 gpm

c)

60 gpm

d)

80 gpm

81.

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

a)

1010 hPa

b)

985 hPa

c)

1005 hPa

d)

990 hPa

82.

Steep pressure gradient would mean

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

83.

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

a)

Negative

b)

Radiation

c)

Subsidence

d)

Airmass

84.

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

a)

Warm/ Low

b)

Cold/ Low

c)

Hot/ High

d)

Cool/ Low

85.

The movement of wind in relation to a cyclone is

a)

Descending and subsiding

b)

Ascending and converging

c)

Descending and cooling

d)

Ascending and subsiding

86.

An aerodrome is at the mean sea level. Its QNH is 1014.0 hPa. Its QFF will be

a)

1014.0 hPa

b)

1013.25

c)

Difficult to tell

d)

More than QNH