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IC JOSHI QUESTIONS Flashcards

1
Q

1_Lowest layer of atmosphere is: (a) Troposphere (b) Stratosphere (c) Mesosphere (d) Thermosphere

A

Troposphere

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2
Q

2_Height of Tropopause at equator is: (a) 8-10 km (b) 12-14 km (c) 16-18 km (d) 20-25 km

A

16-18 km

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3
Q

3_Height of Tropopause at Poles is: (a) 6-8 km (b) 8-10 km (c) 12-14 km (d) 16-18 km

A

8-10 km

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4
Q

4_Higher the surface temperature: (a) Higher (b) Lower (c) Same (d) Constant

A

Higher

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5
Q

5_ISA at mean sea level temperature is: (a) 15°C (b) 20°C (c) 10°C (d) 25°C

A

15°C

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6
Q

6_Air composition varies with: (a) Altitude (b) Latitude (c) Longitude (d) Pressure

A

Altitude

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7
Q

7_Composition of atmosphere majorly consists of: (a) Nitrogen (b) Oxygen (c) Argon (d) Carbon Dioxide

A

Nitrogen

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8
Q

8_Solar radiation is absorbed in: (a) Troposphere (b) Stratosphere (c) Mesosphere (d) Thermosphere

A

Stratosphere

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9
Q

9_CO2 and H2O are called: (a) Noble Gases (b) Greenhouse Gases (c) Rare Earth Gases (d) Neutral Gases

A

Greenhouse Gases

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10
Q

10_Atmosphere is most unstable in: (a) Stratosphere (b) Troposphere (c) Mesosphere (d) Thermosphere

A

Troposphere

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11
Q

11_Percentage of atmospheric weight below 18 km is: (a) 50% (b) 75% (c) 25% (d) 90%

A

0.75

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12
Q

12_The gaseous composition of dry air majorly includes: (a) Nitrogen 78% (b) Oxygen 21% (c) Argon 0.9% (d) Carbon Dioxide 0.04%

A

Nitrogen 78%

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13
Q

13_Height of Stratosphere is: (a) 20-30 km (b) 30-40 km (c) 20-50 km (d) 50-70 km

A

20-50 km

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14
Q

14_Mother of Pearl clouds occur in: (a) Mesosphere (b) Stratosphere (c) Troposphere (d) Thermosphere

A

Stratosphere

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15
Q

15_Temperature lapse rate in ISA is: (a) 2°C/km (b) 6.5°C/km (c) 9.8°C/km (d) 3.5°F/1000 ft

A

6.5°C/km

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16
Q

16_By volume

A

the approximate ratio of O2 to N2 in the atmosphere is: (a) 1:1 (b) 1:2 (c) 1:4 (d) 1:6

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17
Q

17_By volume

A

the proportion of CO2 in the atmosphere is: (a) 0.02% (b) 0.03% (c) 0.04% (d) 0.05%

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18
Q

18_ISA standard temperature lapse rate is: (a) 5°C/km (b) 6.5°C/km (c) 7.5°C/km (d) 8.5°C/km

A

6.5°C/km

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19
Q

19_Maximum concentration of ozone is at: (a) 15-20 km (b) 20-25 km (c) 25-30 km (d) 30-35 km

A

20-25 km

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20
Q

20_Additional oxygen is needed when flying above: (a) 5

A

000 ft (b) 7

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21
Q

21_Noctilucent clouds occur in: (a) Troposphere (b) Stratosphere (c) Mesosphere (d) Thermosphere

A

Mesosphere

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22
Q

22_Temperature in the mesosphere is: (a) -40°C (b) -56°C (c) -70°C (d) -90°C

A

-90°C

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23
Q

23_Temperature in stratosphere increases with: (a) Height (b) Altitude (c) Pressure (d) Latitude

A

Height

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24
Q

24_ISA temperature at 11 km is: (a) -40.5°C (b) -45.6°C (c) -50.7°C (d) -56.5°C

A

-56.5°C

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25
Q

25_Half of atmospheric air mass is contained below: (a) 10

A

000 ft (b) 15

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26
Q

26_Temperature decreases with height due to: (a) Radiation (b) Expansion (c) Convection (d) Compression

A

Expansion

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27
Q

27_Lapse rate at equator is higher than at poles due to: (a) Higher Altitude (b) Higher Pressure (c) Higher Temperature (d) Higher Latitude

A

Higher Temperature

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28
Q

28_ISA standard atmosphere occurs at sea level: (a) Pressure = 1013.25 hPa (b) Temperature = 15°C (c) Density = 1.225 kg/m3 (d) All of the above

A

All of the above

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29
Q

29_Tropical Troposphere extends from the equator to 15° latitude and its height is: (a) 10-12 km (b) 12-14 km (c) 14-18 km (d) 16-20 km

A

14-18 km

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30
Q

30_Conduction and radiation mostly occurs in: (a) Stratosphere (b) Mesosphere (c) Thermosphere (d) Troposphere

A

Troposphere

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31
Q

31_Most of the moisture is found in: (a) Stratosphere (b) Mesosphere (c) Troposphere (d) Thermosphere

A

Troposphere

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32
Q

32_Negative lapse rate implies: (a) Temperature decreases with height (b) Temperature increases with height (c) Temperature remains constant (d) None of the above

A

Temperature increases with height

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33
Q

33_Maximum air temperature is found at: (a) Surface (b) Troposphere (c) Stratosphere (d) Mesosphere

A

Surface

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34
Q

34_ICAO ISA atmosphere temperature at sea level is: (a) 0°C (b) 10°C (c) 15°C (d) 20°C

A

15°C

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35
Q

35_In ISA atmosphere the tropopause occurs at a height of: (a) 6-8 km (b) 8-10 km (c) 10-12 km (d) 12-14 km

36
Q

36_Most of the transfer of heat in the atmosphere is due to: (a) Conduction (b) Radiation (c) Convection (d) Evaporation

A

Convection

37
Q

37_Removal of temperature in the atmosphere is due to: (a) Lapse rate (b) Radiation (c) Convection (d) Compression

A

Lapse rate

38
Q

38_Heat transfer in the atmosphere occurs mostly due to: (a) Conduction (b) Evaporation (c) Convection (d) Radiation

A

Convection

39
Q

39_Air composition changes due to: (a) Pressure (b) Gravitation of Earth (c) Mixing due to turbulence (d) Temperature

A

Mixing due to turbulence

40
Q

40_ISA deviation formula is given as: (a) ISA - Actual (b) Actual - Standard (c) Standard - Actual (d) None of the above

A

Actual - Standard

41
Q

41_Standard ISA lapse rate is: (a) 2°C/km (b) 6.5°C/km (c) 7.5°C/km (d) 8.5°C/km

42
Q

42_Pressure at sea level in ISA is: (a) 1000 hPa (b) 1010 hPa (c) 1013.25 hPa (d) 1020 hPa

A

1013.25 hPa

43
Q

43_Standard ISA density at MSL is: (a) 1.125 kg/m3 (b) 1.225 kg/m3 (c) 1.325 kg/m3 (d) 1.425 kg/m3

A

1.225 kg/m3

44
Q

44_Mother of Pearl clouds occur in the: (a) Stratosphere (b) Mesosphere (c) Thermosphere (d) Troposphere

A

Stratosphere

45
Q

45_Tropopause height at poles is: (a) 6-8 km (b) 8-10 km (c) 10-12 km (d) 12-14 km

46
Q

Q1_Winds in a low pressure (a) Converge (b) Diverge (c) Go straight

A

a (Converge)

47
Q

Q2_Low pressure is associated with (a) Good Weather (b) Bad Weather (c) None

A

b (Bad Weather)

48
Q

Q3_In a high pressure area winds are (a) Normal (b) Strong (c) Weak

A

b (Strong)

49
Q

Q4_Flying from Low to High an altimeter would read (a) Over (b) Under (c) Constant

50
Q

Q5_Isobars are lines of equal (a) Pressure (b) Temperature Tendency (c) Pressure Tendency

A

a (Pressure)

51
Q

Q6_What kind of a barometer is an altimeter (a) Aneroid (b) Mercury (c) Alcohol

A

a (Aneroid)

52
Q

Q7_A region between two Lows and Two Highs is (a) Depression (b) Secondary Low (c) Col

53
Q

Q8_Bad weather and better visibility is associated with (a) High (b) Low (c) Col

54
Q

Q9_The relationship between height and pressure is made use in construction of (a) Altimeter (b) ASI (c) VSI

A

a (Altimeter)

55
Q

Q10_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

A

c (datum at which its sub-scale is set)

56
Q

Q11_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

A

a (Ac flying over warm air mass)

57
Q

Q12_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
Q

Q13_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
Q

Q14_Lines drawn through places of equal pressure are known as (a) Isobars (b) Isotherms (c) Isogonal (d) Isoclinal

A

a (Isobars)

60
Q

Q15_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

b (At trough winds back in N-hemisphere)

61
Q

Q16_Semi diurnal pressure changes are most pronounced in (a) Polar region (b) Middle latitudes (c) Tropics

A

c (Tropics)

62
Q

Q17_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) Lower (b) Same (c) Higher

A

c (Higher)

63
Q

Q18_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

A

b (In anticlockwise direction)

64
Q

Q19_Altimeter of a/c on ground reads aerodrome elevation its sub-scale is set to (a) QNH (b) QFF (c) QFE

65
Q

Q20_Instrument for recording pressure is called (a) Anemograph (b) Barometer (c) Hygrograph

A

b (Barometer)

66
Q

Q21_Poor visibility is associated with (a) High (b) Low (c) Trough

67
Q

Q22_On either side perpendicular to the pressures rise (a) Trough (b) Ridge (c) Low

68
Q

Q23_Fall of pressure with height is more rapid in (a) Cold areas (b) Warm areas (c) Humid areas

A

b (Warm areas)

69
Q

Q24_300 hPa in ISA corresponds to the level (a) 20 000 ft (b) 30 000 ft (c) 35 000 ft

A

b (30 000 ft)

70
Q

Q25_18 000 ft height in ISA corresponds to the pressure level (a) 700 hPa (b) 200 hPa (c) 500 hPa

A

c (500 hPa)

71
Q

Q26_200 hPa in ISA corresponds to the level (a) 20 000 ft (b) 30 000 ft (c) 40 000 ft

A

c (40 000 ft)

72
Q

Q27_24 000 ft height in ISA corresponds to pressure level (a) 400 hPa (b) 500 hPa (c) 300 hPa

A

c (300 hPa)

73
Q

Q28_700 hPa in ISA corresponds to the Flight level (a) 20 000 ft (b) 10 000 ft (c) 18 000 ft

A

b (10 000 ft)

74
Q

Q29_40 000 ft height in ISA approximately corresponds to pressure level (a) 400 hPa (b) 500 hPa (c) 200 hPa

A

c (200 hPa)

75
Q

Q30_850 hPa in ISA corresponds to the height (a) 7 000 ft (b) 5 000 ft (c) 10 000 ft

A

b (5 000 ft)

76
Q

Q31_Atmospheric pressure is due to (a) wind (b) temperature (c) gravity (d) density

A

c (gravity)

77
Q

Q32_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

A

c (Flying towards Low)

78
Q

Q33_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

A

b (400 hPa)

79
Q

Q34_In contour chart of 300 hPa isohypses (contours) are drawn at interval of (a) 20 gpm (b) 40 gpm (c) 60 gpm (d) 80 gpm

A

b (40 gpm)

80
Q

Q35_In constant pressure chart of 500 hPa isohypses are drawn at interval of (a) 20 gpm (b) 40 gpm (c) 60 gpm (d) 80 gpm

A

b (40 gpm)

81
Q

Q36_QNH of an aerodrome 100 m AMSL is 1005 hPa QFE Assuming 1 hPa=8 m (a) 1010 hPa (b) 985 hPa (c) 1005 hPa (d) 990 hPa

A

b (985 hPa)

82
Q

Q37_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

A

d (Isobars closely packed and strong wind)

83
Q

Q38_What type of inversion occurs when a stable layer lies in a high pressure area (a) Negative (b) Radiation (c) Subsidence (d) Airmass

A

c (Subsidence)

84
Q

Q39_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

A

c (Hot High)

85
Q

Q40_The movement of wind in relation to a cyclone is (a) Descending and subsiding (b) Ascending and converging (c) Descending and diverging (d) Ascending and cooling

A

b (Ascending and converging)

86
Q

Q41_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

A

a (1014.0 hPa)

MET (4 decks)

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