Part66EASA Module11A.05.1-Instrument Systems(ATA 31).(1of8)

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With a V.S.I. pointer at position 1 on the upper half of the scale it indicates
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1 point

A. 1,000 ft/minute rate of descent.

B. 1,000 ft/minute rate of climb.

C. 100 ft/minute rate of climb.

The fast erection push on an electrical gyro horizon must not be used for a set period after switching on because.
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1 point

A. excessive hunting will take place.

B. overheating of the gyro rotor windings will occur.

C. the normal erection switch contact will burn out.

The Turn and Slip indicator employ
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1 point

A. a vertical gyro.

B. a rate gyro.

C. an azimuth gyro.

The speed of a vacuum driven gyro horizon rotor is approximately.
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1 point

A. 22,000 rpm.

B. 15,000 rpm.

C. 4,200 rpm.

Which of these barometric instruments uses a restrictor to compute its output?.
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1 point

Option A. Machmeter.

Option B. VSI.

Option C. ASI.

Agonic lines link places of.
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1 point

A. zero variation.

B. different variation.

C. equal variation.

In a directional gyro, the inner/outer gimbal is corrected to.
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1 point

A. 15 sine latitude.

B. 15 cosine latitude.

C. 15 sine longitude.

On descent, the pressure in a V.S.I. capsule.
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1 point

A. leads the case pressure.

B. lags the case pressure.

C. is the same as case pressure.

Why is a directional gyro inner gimbal restricted to +/- 85º?.
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1 point

A. To ensure outer gimbal erection system works correctly.

B. To prevent outer gimbal rotating.

C. To prevent gyro going into gimbal lock.

Which device is used to slave the directional gyro of a compass?

1 point

a) Turn coordinator

b) Magnetic compass

c) Flux valve

The Port and Starboard static vents on an aircraft are inter-connected to.
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1 point

A. reduce compressibility error.

B. minimize errors caused by leaks in the system.

C. cancel errors caused in the static system when the aircraft yaws.

Electrical driven gyros are.
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1 point

A. rotated at the same speed as air driven gyros.

B. rotated slower than air driven gyros.

C. rotated faster than air driven gyros.

In a compass swing: North error -2 degrees, South error - 2 degrees. The coefficient C is.
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1 point

A. +2 degrees.

B. -2 degrees.

C. 0 degrees.

An artificial horizon has.
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1 point

A. the inner gimbal pivoted laterally.

B. the inner gimbal pivoted vertically.

C. the inner gimbal pivoted longitudinally.

The decision height light will illuminated when.
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1 point

Option A. the aircraft's indicated altitude is above decision height.

Option B. the decision height is selected.

Option C. the aircraft's indicated altitude is below decision height.

The Altimeter works on the principle of barometric principle and measures

1 point

A. differential pressure

B. Absolute pressure

C. Engine RPM

Clear selection

Apparent drift of a directional gyro is due to.
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1 point

A. the effect of the earth's rotation.

B. unbalance of the gimbals.

C. bearing friction.

In an aircraft, what does the vane of the angle of attack control by its movement?

1 point

A. Engine thrust

B. Cabin temperature

C. Variable resistance

The command bars in a flight director system indicate.
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1 point

A. the actual path with respect to required path.

B. the required path with respect to actual path.

C. true horizon.

Position error is caused by.
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1 point

A. pitot head position.

B. instrument location in the instrument panel.

C. mechanical imperfections in an instrument.

Gyro precessional force is.
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1 point

A. inversely proportional to the applied force.

B. directly proportional to applied force.

C. proportional to the square of the applied force.

Damping on a RATE GYRO can be either.
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1 point

A. viscous, eddy current or air dash pot.

B. eddy current, variable spring or moving iron.

C. viscous, eddy current or variable spring.

In a directional gyro, how is the outer gimbal ring pivoted?

1 point

A. Horizontally

B. Vertically

C. Diagonally

In a rate gyro used to detect movements about a vertical axis, the amount the gimbal ring moves would be increased if the.
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1 point

A. angle through which the gyro moves in azimuth increases.

B. rotor speed decreases.

C. spring tension was increased.

The speed of the rotor in a Turn and Slip indicator is approximately.
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1 point

A. 2,400 rpm.

B. 4,200 rpm.

C. 22,500 rpm.

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