Instruments/ Pressure Measurement

A dynamic pressure measurement circuit is constituted of the following pressure probes: total pressure and static pressure. static pressure only. total pressure only. total pressure and standard pressure.

The total pressure probe (pitot tube) comprises a mast wich moves its port to a distance from the aircraft skin in order: to locate it outside the boundary layer. not to disturb the aerodynamic flow around the aircraft. it is protected from icing. it is easily accesible during maintenance checks.

Concerning the pitot and static system, the static pressure error varies according to: 1) altimeter setting 2) aircraft speed 3) angle of attack The combination that regroups all of the correct statements is: 1,2,3. 1,2. 1,3. 2,3.

The alternate static source of a light non-pressurized aircraft is located in the flight deck. As the alternate static source is opened, the vertical airspeed indicator may: be blocked. indicate a high rate of descent. indicate a slight momentary descent. indicate a momentary climb.

The alternate static source of a light non-pressurized aeroplane is located in the flight deck; when used, the altimeter: Indicates zero. tends to under-read. is blocked. tends to over-read.

The alternate static source of a light non-pressurized aeroplane is located in the flight deck. When used: it has no influence on airspeed indicator reading. the airspeed indicator tends to under-read. the airspeed indicator tends to over-read. the airspeed indicator indicates a consistent decreasing speed.

If, during a descent: -the pneumatic altimeter reading is constant -the vertical speed indicator shows zero -The IAS is increasing The most likely explanation is that: the static ports are completely clogged up by ice. the total pressure head is completely blocked. there is a leakage in the static pressure line. the antenna of the radio altimeter is completely iced up.

Which of the following instrumets are connected to the pitot-static system? 1)altimeter 2)air-operated directional gyro 3)vertical speed indicator 4)airspeed indicator The combination regrouping all the correct statements is: 1,3. 1,3,4. 1,2,3,4. 1,2,4.

The alternate static source of a light non-pressurized aircraft is located in the flight deck. When used: 1) the airspeed indicator tends to under-read 2) the airspeed indicator tends to over-read 3) the altimeter tends to under-read 4) the altimeter tends to over-read The combination that regroups all of the correct statements is: 2,4. 1,4. 2,3. 1,3.

In case of accidental closing of an aircraft's left static pressure port (rain, birds), the altimeter: keeps on providing reliable reading in all situations. over-reads the altitude in case of a side-slip to the right and displays the correct information during symmetric flight. over-reads the altitude in case of a side-slip to the left and displays the correct information during symmetric flight. under-reads the altitude.

If the static vent becomes blocked due to ice on an un-pressurized aircraft, what can you do?. Select standby pitot source. Break the VSI glass. The altimeter will function as airspeed indicator - an increase in airspeed will be indicated as a climb; decrease in airspeed as descent. The altimeter will function as airspeed indicator - an increase in airspeed will be indicated as a descent; decrease in airspeed as climb.

The open-ended tube parallel to the longitudinal axis of the aircraft senses the: dynamic pressure. static pressure. total pressure. total pressure plus static pressure.

The alternate static source is used: to compensate the static pressure error. to compensate the hysteresis of the aneroid capsule. when the static ports become blocked. when the drain holes freeze.

Which instrument does not connect to the satic system?. altimeter. vacuum gauge. airspeed indicator. vertical speed indicator.

The pressure measured at the forward facing orifice of a pitot tube is: static pressure. total pressure. total pressure plus static pressure. dynamic pressure.

Given: Pt= Total pressure Ps= Static pressure Dynamic pressure is: Pt/Ps. (Pt-Ps)/Pt. (Pt-Ps) + Ps. Pt-Ps.

The alternate static source of a light non-pressurized aircraft is located in the flight deck. When used, the static pressure sensed is likely to be: lower than ambient pressure due to aerodynamic suction. higher than ambient pressure due to aerodynamic suction. higher than ambient pressure if QNH is greater than 1013 hPA. lower than ambient pressure if QNH is greater than 1013 hPA.

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: calculating the ambient static pressure, allowing for the altitude and QNH and adjusting the instruments. descending as much as possible in order to fly at a pressure as close to 1013.25 hPA as possible. slightly opening a window to restore the ambient pressure in the cabin. breaking the rate-of-climb indicator glass window.

The error in altimeter readings caused by the variations of the static port pressure near the source is known as: instrument error. hysteresis error. position error. barometric error.

A pitot tube covered by ice which blocks the ram air inlet will affect the following instruments: altimeter. airspeed indicator. vertical speed indicator. airspeed indicator, altimeter and vertical speed indicator.

If the pitot tube ices up during flight, the affected equipment(s) is (are): 1) the altimeter 2) the variometer 3) the airspeed indicator The combination regrouping all the correct statements is: 1,2. 1,2,3. 1,3. 3.

The use of an alternate static source fed from within the cabin results than the static pressure sensed is likely to be: lower than ambient pressure due to aerodynamic suction. higher than ambient pressure due to position error. higher than ambient pressure due to aerodynamic suction. lower than ambient pressure due to position error.

Concerning the pitot and static system, the static pressure error: affects the alternate static port only. is a direct effect of heating of the static ports. is a direct effect os a blockage of the static port. is caused by disturbed airflow around the static ports.