Vayudoot Aviation

1. Position error

will usually decrease as the aircraft approaches the speed of sound.

will usually decrease with an increase in altitude.

may be reduced by the fitting of static vents.

will depend solely on the attitude of the aircraft.

2. A static vent is used to measure

dynamic pressure plus pitot excess.

atmospheric pressure.

dynamic pressure minus pitot excess.

pitot excess pressure.

3. Which of the following instruments require inputs of both pitot and static pressure

airspeed indicator only.

airspeed indicator and machmeter.

airspeed indicator, machmeter and vertical speed indicator.

airspeed indicator, vertical speed indicator, altimeter.

4. Manoeuvre induced error

lasts for only a short time at high altitude.

is combined with instrument and position error on a correction card.

is likely to be greatest when yawing after engine failure.

is caused by transient pressure changes at static vents.

5. A pressure head is subject to the following errors:

position, manoeuvre induced, density.

position, manoeuvre induced, temperature.

position, manoeuvre induced, instrument.

position, manoeuvre induced.

6. Turbulent flow around a pressure head will cause:

an increase in the dynamic pressure

95% of pressure error.

95% increase in manoeuvre induced error.

density error.

7. A pitot head is used to measure:

dynamic pressure.

dynamic minus static pressure.

static plus dynamic pressure.

static pressure.

8. Where an alternate static source is fitted, use of this source usually leads to:

an increase in position error.

a temporary increase in lag error.

no change in position error.

a lower pressure error than with normal sources.

9. Pressure heads supply data to the following instruments

air data computers, compasses, altimeters, and ASI's.

all the above plus air driven gyros.

standby instruments only, when air data computers fitted.

altimeters, ASI's, VSI's, machmeters, air data computers.

10. Static vents are usually fitted to both sides of the aircraft fuselage. This will:

enable a greater number of instruments to be fitted.

require a calibration card for each static vent.

balance out errors caused by side slipping or yawing.

reduce the position error.

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Questions for PRESSURE HEADS