WorksheetsCPL Acft Tech - Pressure instruments
Total questions: 20
Worksheet time: 10mins
Static air pressure is...
the amount of pressure exerted by a fluid that is not flowing
only the weight of air pushing upwards
only the weight of air pushing downwards
only the weight of air pushing sideways
Dynamic pressure is...
pressure due to movement of air
pressure due to movement of electrons independent of an electrical field
pressure exerted on an object by air when in a perfect vacuum
pressure that is constantly changing
The pressure measured or collected by a pitot probe consists of..
static and dynamic pressure
dynamic pressure
static pressure
ambient pressure
The airspeed indicator requires...
GPS to work
dynamic and static pressure to work
dynamic pressure only to work
static pressure only to work
dynamic and static pressure, and GPS to work
The vertical speed indicator requires...
GPS to work
dynamic and static pressure to work
dynamic pressure only to work
static pressure only to work
dynamic and static pressure, and GPS to work
The altimeter requires...
GPS to work
dynamic and static pressure to work
dynamic pressure only to work
static pressure only to work
dynamic and static pressure, and GPS to work
Pitot heat is used to...
remove any water from the air entering the pitot tube
remove any water from the air entering the static vent
prevent or remove any ice from the pitot head
remove any ice from the static air pressure system
Looking at the Christchurch ATIS in the picture, what is the density altitude?
1733 feet
1610 feet
803 feet
1033 feet
Compressibility error causes...
the airspeed indicator to over read
the airspeed indicator to under read
the altimeter to under read
the altimeter to over read
As you increase altitude in an aircraft...
TAS increases relative to IAS due to air density
IAS increases relative to TAS due to air density
TAS increases relative to IAS due to air instrument error
IAS increases relative to TAS due to air instrument error
You are flying an aircraft with suction driven instruments. During flight, the static vent becomes blocked.
Select all instruments which will be affected?
Altimeter
Airspeed Indicator
Direction Indicator
Balance ball
Turn coordinator
You are flying from Dunedin to Christchurch. At Dunedin the QNH is 1015 and temperature +11 degrees Celsius. At Christchurch it is 1020 and +12 degrees Celsius.
Which statement is true?
If you fly from Dunedin to Christchurch without changing your QNH, your altimeter will under read
If you fly from Dunedin to Christchurch without changing your QNH, your altimeter will over read
The QNH change will balance out the temperature change
The temperature change will balance out the QNH change
Position error is a well known error regarding the...
Vertical Speed Indicator, Altimeter and Airpeed Indicator
Vertical Speed Indicator only
Altimeter only
Airspeed Indicator only
You are flying south from point A (in the north) to point B (in the south). At point A, the temperature is 15 degrees Celsius and QNH is 1010 hPa. At point B, the temperature is 21 degrees Celsius and QNH is 1010 hPa. Which statement is correct?
Air density at the destination is lower than at the origin
Air density at the origin is lower than at the destination
Density altitude is the same at both A and B
Pressure altitude is the same at both A and B
Climbing through 6000 feet, you pitot tube becomes blocked due to icing but your static vent remains clear.
Select all instruments which will be affected.
Altimeter
Airspeed Indicator
Vertical Speed Indicator
Direction Indicator
Manifold Air Pressure gauge
Select the correct tolerances for an altimeter.
Select both a positive and a negative value
+30 feet
- 45 feet
+ 60 feet
+ 45 feet
- 30 feet
A Vertical Speed Indicator uses what device as part of the internal mechanism?
Metering unit
Bourdon tube
Pitot tube
Gyroscope
A Vertical Speed Indicator is considered serviceable if, within a temperature range of -20o to +50o Celsius, it is accurate to within...
+ or - 200 feet per minute
+ or - 100 feet per minute
+ or - 300 feet per minute
+ or - 50 feet per minute
On an airspeed indicator what does the bottom of the green band indicate?
Stalling speed with landing gear and flaps up, and power off
Stalling speed with landing gear and flaps down, and power off
The maximum speed for flight in smooth air
Maximum flap extension speed
On the take off role you notice that the Vertical Speed Indicator indicates a slight rate of climb. This is likely to be due to...
airflow past the static vent causing a lower pressure
airflow past the pitot tube causing a lower pressure
airflow past the static vent causing a higher pressure
airflow past the pitot tube causing a higher pressure
