Powerplant Systems & Components: Engine Instrument Systems 🔊 Flashcards

1
Q

What are the units in an engine fuel flow system?

A

A transmitter and an indicator for each engine

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2
Q

Where is the fuel flow transmitter located?

A

Mounted in the fuel line between the engine driven pump and the 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 fuel flow transmitter measure?

A

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

Fuel consumption and the operator is able to determine 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

Absolute pressure in the intake manifold

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7
Q

What would be the effect of a broken manifold pressure gauge line?

A

The gauge will indicate atmospheric pressure

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8
Q

What does the engine tachometer indicate?

A

Crankshaft speed (RPM)

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9
Q

What is the most likely cause of an oscillating tachometer?

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

Percent engine rotor (shaft) RPM

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12
Q

What is the EPR on a turbine engine?

A

Ratio between total turbine discharge pressure to total inlet pressure; an indication of 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 a carburetor air temperature bulb located?

A

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

Checking resistance to thermocouples and circuits

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16
Q

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

A

2 to 8 ohms