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Question 1: Winds in a low pressure
A) Converge
B) Diverge
C) Go straight
Explanation: Winds in a low pressure area converge.
Question 2: Low pressure is associated with
A) Good Weather
B) Bad Weather
C) None
Explanation: Low pressure is associated with bad weather.
Question 3: In a high pressure area, winds are
A) Normal
B) Strong
C) Weak
Explanation: In a high pressure area, winds are weak.
Question 4: Flying from Low to High, an altimeter would read
A) Over
B) Under
C) Constant
Explanation: Flying from low to high pressure, an altimeter would read under.
Question 5: Isallobars are lines of equal
A) Pressure
B) Temperature Tendency
C) Pressure Tendency
Explanation: Isallobars are lines of equal pressure tendency.
Question 6: What kind of a barometer is an altimeter?
A) Aneroid
B) Mercury
C) Alcohol
Explanation: An altimeter is an aneroid barometer.
Question 7: A region between two Lows and two Highs is
A) Depression
B) Secondary Low
C) Col
Explanation: A region between two Lows and two Highs is called a Col.
Question 8: Bad weather and better visibility is associated with
A) High
B) Low
C) Col
Explanation: Bad weather and better visibility is associated with low pressure.
Question 9: The relationship between height and pressure is made use in the construction of
A) Altimeter
B) ASI
C) VSI
Explanation: The relationship between height and pressure is used in the construction of altimeters.
Question 10: An altimeter always measures the height of an aircraft above
A) MSL
B) Datum level of 1013.2 hPa
C) Datum level at which its sub-scale is set
Explanation: An altimeter measures the height of an aircraft above the datum level at which its sub-scale is set.
Question 11: Two aircraft flying at the same indicated altitude with their altimeter set to 1013.2 hPa. One is flying over a cold air mass and the other over a warm air mass. Which of the two has greater altitude?
A) Aircraft flying over warm air mass
B) Aircraft flying over cold air mass
Explanation: The aircraft flying over a warm air mass will have a greater altitude.
Question 12: The rate of fall of pressure with height in a warm air mass compared to a cold air mass will be
A) Same
B) More
C) Less
Explanation: The rate of fall of pressure with height in a warm air mass will be less compared to a cold air mass.
Question 13: An increase of 1000 ft at MSL is associated with a decrease of pressure of
A) 100 hPa
B) 1000 hPa
C) 3 hPa
D) 33 hPa
Explanation: An increase of 1000 ft at MSL is associated with a decrease of pressure of 3 hPa.
Question 14: Lines drawn through places of equal pressure are known as
A) Isobars
B) Isotherms
C) Isogonal
D) Isoclinal
Explanation: Lines drawn through places of equal pressure are known as isobars.
Question 15: Which is true
A) Trough has frontal characteristics
B) At trough winds back in N-Hemisphere
C) At trough winds veer in N-Hemisphere
Explanation: At a trough, winds back in the Northern Hemisphere.
Question 16: Semi-Diurnal pressure changes are most pronounced in
A) Polar region
B) Middle latitudes
C) Tropics
Explanation: Semi-diurnal pressure changes are most pronounced in the tropics.
Question 17: Flying from Delhi to Calcutta at constant indicated altitude but experiencing a drift to Starboard. The actual altitude will be (Vis-a-Vis) indicated altitude
A) Lower
B) Same
C) Higher
Explanation: Flying from Delhi to Calcutta with a drift to Starboard, the actual altitude will be lower than indicated.
Question 18: 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
Explanation: In the Southern Hemisphere, around a Low Pressure Area, wind blows in a clockwise direction.
Question 19: Altimeter of an aircraft on ground reads aerodrome elevation, its subscale is set to
A) QNH
B) QNE
C) QFF
D) QFE
Explanation: When an altimeter is set on the ground to read aerodrome elevation, its subscale is set to QNH.
Question 20: Instrument for recording pressure is called
A) Anemograph
B) Barometer
C) Hygrograph
Explanation: An instrument for recording pressure is called a barometer.
Question 21: Poor visibility is associated with
A) Low
B) High
C) Col
Explanation: Poor visibility is typically associated with low pressure.
Question 22: On either side, perpendicular to the ……….. pressures rise
A) Trough
B) Ridge
C) Low
Explanation: On either side, perpendicular to the trough, pressures rise.
Question 23: Fall of pressure with height is more rapid in
A) Cold areas
B) Warm areas
C) Humid areas
Explanation: The fall of pressure with height is more rapid in cold areas.
Question 24: 300 hPa in ISA corresponds to the level
A) 20,000 ft
B) 30,000 ft
C) 35,000 ft
Explanation: 300 hPa in ISA corresponds to the level of 30,000 ft.
Question 25: 18,000 ft height in ISA corresponds to level
A) 700 hPa
B) 200 hPa
C) 500 hPa
Explanation: 18,000 ft height in ISA corresponds to the level of 500 hPa.
Question 26: 200 hPa in ISA corresponds to the level
A) 20,000 ft
B) 30,000 ft
C) 40,000 ft
Explanation: 200 hPa in ISA corresponds to the level of 40,000 ft.
Question 27: 24,000 ft height in ISA corresponds to level
A) 400 hPa
B) 500 hPa
C) 300 hPa
Explanation: 24,000 ft height in ISA corresponds to the level of 400 hPa.
Question 28: 700 hPa in ISA corresponds to the level
A) 20,000 ft
B) 10,000 ft
C) 18,000 ft
Explanation: 700 hPa in ISA corresponds to the level of 10,000 ft.
Question 29: 40,000 ft height in ISA corresponds to level
A) 400 hPa
B) 500 hPa
C) 200 hPa
Explanation: 40,000 ft height in ISA corresponds to the level of 200 hPa.
Question 30: 850 hPa in ISA corresponds to the level
A) 7,000 ft
B) 5,000 ft
C) 10,000 ft
Explanation: 850 hPa in ISA corresponds to the level of 7,000 ft.
Question 31: Atmospheric pressure is due to
A) Wind
B) Temperature
C) Gravity
D) Density
Explanation: Atmospheric pressure is due to gravity.
Question 32: 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
Explanation: The aircraft is gaining altitude because it is flying towards an area of higher pressure.
Question 33: 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
Explanation: A contour of 9160 m can be expected at the 300 hPa pressure level.
Question 34: In a contour chart of 300 hPa, isohypses (contours) are drawn at an interval of
A) 20 gpm
B) 40 gpm
C) 60 gpm
D) 80 gpm
Explanation: In a contour chart of 300 hPa, isohypses are drawn at an interval of 80 gpm.
Question 35: In a constant pressure chart of 500 hPa, isohypses are drawn at an interval of
A) 20 gpm
B) 40 gpm
C) 60 gpm
D) 80 gpm
Explanation: In a constant pressure chart of 500 hPa, isohypses are drawn at an interval of 40 gpm.
Question 36: QNH of an aerodrome at 160 m AMSL is 1005 hPa. QFE? (Assuming 1 hPa = 8 m)
A) 1010 hPa
B) 975 hPa
C) 1005 hPa
D) 990 hPa
Explanation: QFE can be calculated as 1005 hPa minus the pressure drop corresponding to the height (160 m) which is approximately 30 hPa (1 hPa = 8 m), resulting in 975 hPa.
Question 37: 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
Explanation: A steep pressure gradient is indicated by closely packed isobars and results in strong winds.
Question 38: What type of inversion occurs when a stable layer lies in a high-pressure area?
A) Negative
B) Radiation
C) Subsidence
D) Airmass
Explanation: A stable layer lying in a high-pressure area typically results in a subsidence inversion.
Question 39: Which of the following would cause true altitude to increase when the altimeter indicates constant altitude?
A) Warm/Low
B) Cold/Low
C) Hot/High
D) Cool/Low
Explanation: True altitude will increase when the altimeter indicates constant altitude if the aircraft is in hot/ high pressure conditions.
Question 40: The movement of wind in relation to a cyclone is
A) Clockwise in the Northern Hemisphere
B) Anticlockwise in the Southern Hemisphere
C) Anticlockwise in the Northern Hemisphere
D) Clockwise in the Southern Hemisphere
Explanation: The movement of wind in relation to a cyclone is anticlockwise in the Northern Hemisphere.
Question 41: In a constant pressure chart, the altitude of a pressure level decreases as
A) Pressure increases
B) Pressure decreases
C) Temperature increases
D) Temperature decreases
Explanation: In a constant pressure chart, the altitude of a pressure level decreases as pressure increases.
Question 42: If the QNH increases and the aircraft’s altimeter is not adjusted, the aircraft will appear to be
A) Lower than it actually is
B) Higher than it actually is
C) At the correct altitude
D) Unable to determine altitude
Explanation: If the QNH increases and the aircraft’s altimeter is not adjusted, the aircraft will appear to be lower than it actually is.
Question 43: True altitude of an aircraft is
A) The height above the sea level
B) The height above mean sea level
C) The height above ground level
D) The height above the pressure level
Explanation: True altitude of an aircraft is the height above mean sea level (MSL).
Question 44: An aircraft maintains a constant indicated altitude in descending from a higher pressure area to a lower pressure area. The true altitude
A) Decreases
B) Increases
C) Remains the same
D) Varies randomly
Explanation: As the aircraft descends from a higher pressure area to a lower pressure area, the true altitude decreases.
Question 45: The altitude indicated by the aircraft’s altimeter set to 1013 hPa (standard pressure) is called
A) Pressure altitude
B) Flight level
C) True altitude
D) Absolute altitude
Explanation: The altitude indicated by the aircraft’s altimeter set to 1013 hPa (standard pressure) is called the flight level.
Question 46: In a constant pressure chart, a pressure level of 1000 hPa corresponds to approximately
A) 30,000 ft
B) 10,000 ft
C) 20,000 ft
D) 15,000 ft
Explanation: In a constant pressure chart, a pressure level of 1000 hPa corresponds to approximately 10,000 ft.
Question 47: A temperature inversion occurs when
A) Temperature increases with altitude
B) Temperature decreases with altitude
C) Pressure increases with altitude
D) Pressure decreases with altitude
Explanation: A temperature inversion occurs when the temperature increases with altitude.
Question 48: The height of a pressure level can be determined using
A) Hypsometric equation
B) Bernoulli’s equation
C) Hydrostatic equation
D) Ideal gas law
Explanation: The height of a pressure level can be determined using the hypsometric equation.
Question 49: If the altimeter is not correctly adjusted, it will affect the aircraft’s
A) Altitude accuracy
B) Airspeed
C) Heading
D) Rate of climb
Explanation: Incorrect adjustment of the altimeter affects the accuracy of the aircraft’s altitude.
Question 50: The standard atmosphere lapse rate is
A) 2°C per 1000 ft
B) 3°C per 1000 ft
C) 6.5°C per km
D) 5.5°C per 1000 ft
Explanation: The standard atmosphere lapse rate is 6.5°C per Km.

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