ENGINE INSTRUMENT SYSTEM

Engine pressure ratio is the total pressure ratio between the

• aft end of the compressor and the aft end of the turbine

• front of the compressor and the rear of the turbine

• front of the engine inlet and the aft end of the compressor

which of the following instrument conditions acceptable and does not require immediate correction?

1. Red line missing

2. Pointer loose on shaft

3. Glass cracked

4. Mounting screws loose

5. Case paint chipped

6. Leaking at line B nut

7. Will not zero out

8. Fogged

• 1

• 4

• 5

Which statement is correct concerning a

thermocouple-type temperature indicating instrument

system?

• It is a balanced-type, variable resistor circuit

• It requires no external power source

• It usually contains a balancing circuit in the

  instrument case to prevent fluctuations of the

  system voltage from affecting the temperature

  reading

The indication on a thermocouple-type cylinder head

temperature indicator is produced by

• Resistance changes in two dissimilar metals

• A difference in the voltage between two

  dissimilar metals

• A current generated by the temperature

  difference between dissimilar metal hot and

  cold junctions

Which statement is true regarding a thermocouple-

type cylinder head temperature measuring system?

• The resistance required for cylinder head

  temperature indicators is measured in farads

• The voltage output of a thermocouple system

  is determined by the temperature difference

  between the two ends of the thermocouple

• When the master switch is turned on, a

  thermocouple indicator will move off-scale to

  the low side

Which of the following types of electric motors are

commonly used in electric tachometers?

• Direct current, series-wound motors

• Synchronous motors

• Direct current, shunt-wound motors

In addition to fuel quantity, a computerized fuel

system (CFS) with a totalizer-indicator provides

indication of how many of the following?

1.Fuel flow rate

2.Fuel used since reset or initial start-up

3.Fuel time remaining at current power setting

4.Fuel temperature

• two

• three

• four

On a twin engine aircraft with fuel-injected

reciprocating engines, one fuel-flow indicator reads

considerably higher than the other in all engine

operating configurations. What is the probable cause

of this indication?

• Carburetor icing

• One more fuel nozzles are clogged

• Alternate air door stuck open

The principal fault in the pressure type fuel flow

meter indicating system, installed on a horizontally

opposed continuous-flow fuel injected aircraft

reciprocating engine, is that a plugged fuel injection

nozzle will cause a

• Normal operation indication

• Lower than normal fuel flow indication

• Higher than normal fuel flow indication

A manifold pressure gauge is designed to

• Maintain constant pressure in the intake

  manifold

• Indicate differential pressure between the intake

  manifold and atmospheric pressure

• Indicate absolute pressure in the intake

  manifold