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WorksheetsPressure Altimeter
Total questions: 25
Worksheet time: 8mins
What does an altimeter measure in an aircraft?
Distance traveled
Groundspeed
Altitude above sea level
Vertical Distance of the Aircraft above a reference datum
Which atmospheric pressure setting is standard on the altimeter for flying at or above the transition altitude?
29.92 in Hg
30.12 in Hg
31.00 in Hg
28.92 in Hg
How does the altimeter respond when flying from an area of high pressure to an area of low pressure without adjusting the setting?
It will read lower than the actual altitude
It will read higher than the actual altitude
It will remain unaffected
It will only change when recalibrated
Which setting on the altimeter provides an aircraft’s true altitude above sea level in standard conditions?
QNH
QFE
QNE
QFF
If an aircraft descends and the external air pressure increases, how does the altimeter needle respond?
It rotates clockwise, indicating a higher altitude
It rotates counterclockwise, indicating a lower altitude
It remains the same
It moves in the opposite direction of the increase in pressure
If a pilot sets the altimeter to QFE, what altitude will it indicate?
Altitude above mean sea level
Altitude above ground level
Pressure altitude
True altitude
When is it essential to set the altimeter to standard pressure (29.92 in Hg or 1013 hPa)?
When climbing above transition altitude
When descending for landing
When taxiing on the ground
At the end of a flight
When descending into a region of significantly warmer air without adjusting the altimeter setting, how will this impact the indicated altitude?
The indicated altitude will be lower than the true altitude
The indicated altitude will be higher than the true altitude
No effect on altitude indication
The altimeter will stop functioning
If the static port is blocked during flight, what will the altimeter indicate?
It will freeze at the altitude where the blockage occurred
It will gradually decrease as altitude decreases
It will overestimate altitude
It will reset to sea level
How does an aneroid barometer within the altimeter work to display altitude?
t uses GPS signals to determine altitude
It expands and contracts based on temperature changes
It measures air pressure, expanding or contracting based on altitude changes
It uses radar to measure the distance from the ground
Which component within the altimeter is responsible for indicating changes in pressure as the aircraft ascends or descends?
The Pitot tube
The aneroid capsule(s)
The diaphragm valve
The static pressure port
What is the primary purpose of the Kollsman window on an altimeter?
To display true altitude
To adjust for pressure settings
To set density altitude
To measure ground speed
When using the altimeter to determine field elevation, what should the pilot set the altimeter to?
QNE
QNH
Standard sea level pressure (29.92 in Hg)
Density altitude
The diagram shows a simple altimeter. The parts labelled A, B, C and D are:
pitot pressure inlet, linkage mechanism, bellows, quadrant
air inlet, temperature compensator, leaf spring, linkage mechanism
static pressure inlet, partially evacuated capsule, linkage mechanism, subscale
setting device
static pressure inlet, partially evacuated capsule, leaf spring, linkage
mechanism
In the International Standard Atmosphere, the mean sea level pressure is ......., the
lapse rate of temperature ....... between MSL and ....... and is isothermal up to ........
The numbers missing are:
1225 hPa; 2° per 1000 ft; 37 000 ft; 66 000 ft
1013.25 hPa; 1.98°C per 1000 ft; 36 090 ft; 65 617 ft
1013.25 hPa; 1.98°C per 1000 ft; 36 090 ft; 104 987 ft
1225 hPa; 1.98°C per 1000 ft; 36 090 ft; 104 987 ft
The errors affecting the pressure altimeter are:
instrument position, manoeuvre induced, density, temperature, lag
instrument, pressure, manoeuvre induced, density, temperature, lag
instrument, position, manoeuvre induced, temperature, barometric, lag
instrument, pressure, lag, barometric, temperature, compressibility
A servo altimeter is _____________ than a conventional one because of _________________
More accurate, electrical servos
More accurate, electrical pick off coils.
Less accurate, electrical servo
The advantage of sensitive altimeter over service altimeter is.
It does not form lag error.
Instrument error is really eliminated.
It can be used up to higher altitude
An aircraft is passing 6,500 ft in a descent when the static line becomes
blocked. The altimeter then reads:
less than 6,500 ft
0
6,500 ft
Position error is caused due to
Ground effect
Configuration of A/C
All of the above
When flying from a sector of warm air into one of colder air, the altimeter will?
Under read.
Over read.
Show the actual height above ground.
In a non-pressurized aircraft, if one or several static pressure ports are damaged, there is an ultimate emergency means for restoring a practically correct static pressure intake:
breaking the rate-of-climb indicator glass window
Slightly opening a window to restore the ambient pressure in the cabin
calculating the ambient static pressure, allowing for the altitude and QNH adjusting the instruments
The altimeter is fed by:
differential pressure
dynamic pressure
static pressure
When flying from low pressure to high pressure, the barometric error of an altimeter will cause the instrument to:
indicate a higher altitude than the correct one.
Under read the true altitude of the aircraft.
indicate the true altitude.
Lag error in servo assisted altimeter is virtually removed by:
Electromechanical pick off device.
Rocking mechanism.
Using more than one capsule in series.
