Engine Instrument Systems

Question 1

Many large high-bypass turbofan engines use what type of fuel control system?

Answer 1

FADEC

Question 2

What are the units in an engine fuel flow system?

Answer 2

Transmitter and Indicator

Question 3

Where is the fuel flow transmitter located?

Answer 3

In the fuel line between the engine driven pump and the carburetor

Question 4

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

Answer 4

Fuel flow in pounds per hour

Question 5

What exactly does a mass fuel flow transmitter measure?

Answer 5

Density mass of the fuel that flows through it

Question 6

What is the reason for monitoring the fuel flow?

Answer 6

Fuel consumption and whether the engine is operating at the correct fuel-air mixture

Question 7

What does a manifold pressure gauge indicate?

Answer 7

Absolute pressure in the intake manifold

Question 8

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

Answer 8

The gauge will indicate atmospheric pressure

Question 9

What does the engine tachometer indicate?

Answer 9

Crankshaft speed

Question 10

What is the most likely cause of an oscillating tachometer?

Answer 10

Kink in the cable

Question 11

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

Answer 11

Alternating current tachometer generators

Question 12

What are turbine engine tachometers designed to indicate?

Answer 12

Percent engine rotor shaft RPM

Question 13

What is the EPR on a turbine engine?

Answer 13

Ratio between total turbine discharge pressure to total inlet pressure

Question 14

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

Answer 14

A thermocouple attached to the cylinder head

Question 15

Where is a carburetor air temperature bulb located?

Answer 15

The air intake passage to the engine

Question 16

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

Answer 16

Checking resistance to thermocouples and circuits

Question 17

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

Answer 17

2 to 8 ohms

Question 18

What directly controls manifold pressure?

Answer 18

Engine RPM and throttle opening

Question 19

On an engine equipped with a fixed pitch propeller, what controls both manifold pressure and engine RPM?

Answer 19

Throttle Control

Question 20

When checking the manifold pressure during engine operation, in what position would the prop control be set?

Answer 20

Low Pitch

Question 21

What is the possible cause when a turboprop engine oil pressure drops off severely and the oil supply remains?

Answer 21

Oil pressure transmitter or indicator malfunction

Question 22

Why are turbine engines measured in percent of engine performance instead of RPM?

Answer 22

Jet engines do not output power, but rather thrust force