Vayudoot Aviation

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

position, manoeuvre induced, instrument.

position, manoeuvre induced.

position, manoeuvre induced, density.

position, manoeuvre induced, temperature.

2. Manoeuvre induced error

is caused by transient pressure changes at static vents.

is likely to be greatest when yawing after engine failure.

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

lasts for only a short time at high altitude.

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

enable a greater number of instruments to be fitted.

reduce the position error.

balance out errors caused by side slipping or yawing.

require a calibration card for each static vent.

4. Turbulent flow around a pressure head will cause:

95% increase in manoeuvre induced error.

95% of pressure error.

an increase in the dynamic pressure

density error.

5. Position error

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.

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

6. A pitot head is used to measure:

dynamic minus static pressure.

static plus dynamic pressure.

static pressure.

dynamic pressure.

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

an increase in position error.

no change in position error.

a lower pressure error than with normal sources.

a temporary increase in lag error.

8. A static vent is used to measure

dynamic pressure plus pitot excess.

pitot excess pressure.

atmospheric pressure.

dynamic pressure minus pitot excess.

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

airspeed indicator, vertical speed indicator, altimeter.

airspeed indicator, machmeter and vertical speed indicator.

airspeed indicator and machmeter.

airspeed indicator only.

10. Pressure heads supply data to the following instruments

standby instruments only, when air data computers fitted.

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

all the above plus air driven gyros.

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

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