Subject H - Engine Instrument Systems Flashcards

1
Q

what are the units in an engine fuel flow system?

A

The system consists of a transmitter and an indicator for each engine.

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2
Q

Where is the fuel flow transmitter located?

A

It is mounted in the fuel line between the engine driven pump and carburetor.

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3
Q

What type of readout is indicated on a fuel flow system?

A

The indicator is calibrated to record the fuel flow in pounds per hour.

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4
Q

What exactly does a mass flow transmitter measure?

A

The density mass of the fuel that flows through it.

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5
Q

What is the reason for monitoring the fuel flow?

A

In addition to fuel consumption, the operator can determine the fuel flow indication whether the engine is operating at the correct fuel-air mixture for a given power setting.

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6
Q

What does a manifold pressure gauge indicate?

A

It measures the absolute pressure in the intake manifold.

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7
Q

what would be the effect of a broken manifold pressure gauge.

A

A broken line will cause the gauge to indicate atmospheric pressure.

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8
Q

What does the engine tachometer indicate?

A

It indicates crankshaft speed (RPM)

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9
Q

What is the most likely cause of an oscillating tachometer?

A

a kink in the cable

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10
Q

What type of tachometer is used in multi-engine airplanes?

A

Alternating current tachometer generators.

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11
Q

what are turbine engine tachometers designed to indicate

A

They are designed to indicate the percent of engine rotor (shaft) RPM

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12
Q

What is the EPR on a turbine engine?

A

It is the ratio between total turbine discharge pressure to total inlet pressure and indicates the thrust being developed by the engine.

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13
Q

What is the electric source for a cylinder head temperature gauge?

A

A thermocouple attached to the cylinder head.

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14
Q

Where is the carburetor air temperature bulb located?

A

It is located in the air intake passage to the engine.

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15
Q

How can a turbine engine EGT be checked without operating the engine?

A

BY CHECKING RESISTANCE TO THERMOCOUPLES AND CIRCUITS.

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16
Q

What is the typically acceptable resistance of a cylinder head thermocouple cable?

A

2 to 8 ohms