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Atmosphere Multiple Choice Questions C1- C4

Total questions: 132

Worksheet time: 11mins

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………….. would be the tropopause

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)

60°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 characterised by temperature inversion and stability...

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 O2 to N2 in the atmosphere is

a)

1:3

b)

1:4

c)

1:5

19.

By volume, the approximate ratio of O2 to N2 in the atmosphere is

a)

1:3

b)

1:4

c)

1:5

20.

By volume, the proportion 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.

a)

-05°C

b)

-02° C

c)

-03°C

27.

Pressure at MSL is 1002.25 hPa. Find the ISA deviation.

a)

-11 hPa

b)

10 hPa

c)

12 hPa

28.

In actual atmosphere temp, at 19 km is 60°C. How much it differs from 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 atmosphere, air mass is contained……… below

a)

20,000 ft

b)

15,000 ft

c)

10,000 ft

32.

In jet standard atmosphere the Lapse rate is

a)

2° C/1000 ft

b)

2° C/km

c)

5° C/km

33.

The rate of fall of temperatures with height, called

a)

Isothermal rate

b)

Inversion rate

c)

Lapse rate

34.

In actual atmosphere the lapse rate could

a)

assume any value

b)

fall up to 8 km

c)

rise up to 50 km

35.

Tropical Tropopause extends from the equator to lat 35° 45°. 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 produce by……. and in the stratosphere by…..

a)

evaporation; condensation

b)

Rising air; solar radiation

c)

terrestrial radiation; solar radiation; convection

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 increase in height (INVERSION)

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 start 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.

Lapse rate in the troposphere is due to…… and is the Stratosphere is due to …..

a)

Conduction, convection

b)

terrestrial radiation, solar radiation

c)

Rising air, solar radiation

d)

Water vapour, Ozone.

45.

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

a)

Lase 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 always higher than at 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 associate 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 measure the height of aircraft above

a)

MSL

b)

datum level of 1013.2 hPa

c)

datum level at which its sub-scale is set

56.

Two aircraft are flying at the same indicated altitude with their altimeters set to 1013.2 hPa. One is over a cold air mass and the other over a warm air mass. The aircraft over which air mass has the greater true altitude?

a)

The aircraft over the warm air mass

b)

The aircraft over the cold air mass

c)

Both have the same true altitude

d)

It depends on the wind direction

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 msl 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 Calcutta at constant indicated altitude but, experiencing a drift to Starboard. The actual altitude will be (Visavis) 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 subscale is set to

a)

QNH

b)

QNE

c)

QFF

d)

QFE

65.

Instrument for recording pressure is called

a)

Anemograph

b)

Barometer

c)

Hygrograph

66.

Poor visibility is associated with

a)

High

b)

Low

c)

Col

67.

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

a)

Trough

b)

Ridge

c)

Low

d)

pressures rise

68.

Fall of pressure with height is more rapid in

a)

Cold areas

b)

Warm areas

c)

Humid 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 level

a)

700 hPa

b)

200 hPa

c)

500 hPa

71.

200 hPa in ISA corresponds to the level

a)

20,000ft

b)

30,000 ft

c)

40,000 ft

72.

24,000 ft height in ISA corresponds to level

a)

400 hPa

b)

500 hPa

c)

300 hPa

73.

700 hPa in ISA corresponds to the level

a)

20,000ft

b)

10,000 ft

c)

18,000 ft

74.

40,000 ft height in ISA corresponds to level

a)

400 hPa

b)

500 hPa

c)

200 hPa

75.

850 hPa in ISA corresponds to the level

a)

7,000ft

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, inspite 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)

500 hpa

b)

400 hpa

c)

300 hpa

d)

200 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 = 8 m)

a)

1010 hpa

b)

975 hpa

c)

1005 hpa

d)

990 hpa

82.

Steep Pressure gradient would mean

a)

Contours far apart and weak wind

b)

Contours far apart and 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 diverging

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 hpa

c)

Difficult to tell

87.

Diurnal variation of temperature is greatest when wind is

a)

calm

b)

light

c)

strong

88.

Diurnal variation of temperature is maximum over

a)

forest

b)

ocean

c)

land

89.

On a clear day the amount of solar radiation received by earth surface is

a)

3/4 th

b)

30%

c)

5/6 th

90.

ALBEDO is

a)

Radiation received by earth

b)

Amount of heat

c)

Reflecting power of earth

91.

During Day the ambient temperature is ... than ground

a)

Lower

b)

Higher

c)

Same

92.

Diurnal variation of temperature over ocean is ...

a)

More than land

b)

Above 3°C

c)

Less than 1°C

93.

At a coast station the diurnal variation of temperature, depends on ..

a)

Wind direction

b)

Wind speed

c)

Radiation

94.

Snow surface reflects about……… % of solar radiation.

a)

75%

b)

80%

c)

90%

95.

Amount of Solar radiation received per unit area is .....

a)

Insolation

b)

Convection

c)

Radiation

96.

Solar radiation received by the earth is .....

a)

Long Wave

b)

Albedo

c)

Short wave

97.

Rise in temperature of a surface is proportional to its specific heat

a)

Directly

b)

Indirectly

98.

Specific heat of land is…… than that of water

a)
Lower
b)

Same

c)

Higher

99.

Minimum temperature is reached at ...

a)

Sunrise

b)

Midnight

c)

1∕2 -1 hour after dawn

100.

An air parcel is lifted till it gets saturated. The temperature attained by it is called

a)

Potential temperature

b)

Dew Point

c)

Wet bulb

101.

Cloudy nights are……...

a)

cold

b)

Normal

c)

warm

102.

Water vapour is transparent to terrestrial radiation

a)

Completely

b)

Partially

c)

Indifferent

103.

Higher the temperature ……. would be the wavelength of emitted radiation

a)

Longer

b)

Shorter

104.

Air is a bad conductor of heat. A parcel of air can therefore be regarded as insulated from the environment

a)

False

b)

True

105.

Warmer the earth…….. will be the Nocturnal radiation

a)

Intense

b)

Weaker

c)

Moderate

106.

Heat is the…….. of the KE of all molecules and atoms of a substance

a)

Sum total

b)

Average

107.

The solar radiation consists of about 46 %

a)

UV

b)

IR

c)

Visible

108.

The total energy radiated by a black body is proportional to its temperature (T)

a)

T2

b)

T3

c)

T4

109.

Intense radiation are emitted by

a)

Hot bodies

b)

Cold bodies

c)

Stars

110.

The wavelength of most intense radiation is inversely proportional to its….....

a)

Absolute temperature

b)

Humidity

c)

 Albedo

111.

Hot bodies (like sun) radiate

a)

Short Waves

b)

Long Waves

c)

Both

112.

The flow of heat from earth surface is 77% by

a)

Sensible Heat

b)

Latent Heat

113.

-­40° C = -­40° F

a)

True

b)

False

114.

Surface Temperature is recorded at a height of …….. above ground

a)

1.5 m

b)

1.25 m

c)

2 m

115.

The door of Stevenson's screen should open

a)

opposite to sun

b)

into sun

c)

any direction

116.

The liquid used in Minimum Thermometer is

a)

Mercury

b)

Alcohol

c)

Spirit

117.

Freezing point of water is

a)

 0⁰ F

b)

12⁰ F

c)

22⁰ F

d)

32⁰ F

118.

Boiling point of water is

a)

100⁰ F

b)

112⁰ F

c)

212⁰ F

d)

312⁰ F

119.

Freezing point of water is

a)

173⁰ K

b)

273⁰ K

c)

373⁰ K

d)

473⁰ K

120.

Boiling point of water is

a)

373⁰ K

b)

173⁰ K

c)

273⁰ K

d)

312⁰ K

121.

Convert 68⁰ F into Kelvin temperature

a)

233⁰ K

b)

283⁰ K

c)

294⁰ K

d)

293⁰ K

122.

Diurnal variation of temperature is least on a day when it is

a)

Clear

b)

Partly cloudy

c)

Cloudy

d)

Overcast

123.

A clear and calm night is cooler than a cloudy night, because nocturnal radiation

a)

escape through cloud

b)

are partly radiated back by clouds to earth

c)

are fully absorbed by H₂O

d)

are fully prevented by clouds to escape

124.

Density is …………..

a)

Higher

b)

Lower

c)

Same at poles than equator

125.

The altitude in ISA at which air density is the same as the observed density is called

a)

Density Altitude

b)

ISA Density

c)

Real Density

126.

Density is usually expressed as

a)

Kg/sq m

b)

g/cu m

c)

N/sq m

127.

Higher density altitude means …….. density

a)

Higher

b)

Lower

c)

Same

128.

For given pressure and temperature moist air has density

a)

Higher

b)

Lower

c)

Same

129.

Air is less denser in

a)

High Altitudes

b)

Warm Air

c)

High humidity

d)

All these

130.

Density altitude may be defined as:

a)

The altitude in a standard atmosphere at which the prevailing pressure occurs.

b)

The altitude in a standard atmosphere at which the prevailing density occurs.

c)

Surface of constant atmospheric pressure related to standard atmosphere of 1013.2 hPa

131.

If pressure increases the density altitude

a)

Increases

b)

Lowers

c)

Remains the same

132.

 For every 1⁰C change in temperature, density altitude differs by

a)

33 ft

b)

100 ft

c)

120 ft

d)

210 ft

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