Instrument Systems
Which unit most accurately indicates fuel consumption of a reciprocating engine?
Fuel flowmeter.
Engine oil temperature gauges indicate the temperature of the oil entering what?
The engine.
Which of the instrument conditions is acceptable and does not require immediate correction?
Case paint chipped.
Why is high nickel chromium steel used in many exhaust systems?
Corrosion resistance and low expansion coefficient.
How should ceramic-coated exhaust components be cleaned?
By degreasing.
Motor-driven impeller and turbine fuel flow transmitters are designed to transmit data using what?
Aircraft electrical system power.
Turbine engine EGT thermocouples are constructed of what?
Chrome and Alumel.
Which of the instrument discrepancies require replacement of the instrument?
Glass cracked, will not zero out, pointer loose on shaft, fogged.
What is the purpose of a slip joint in an exhaust collector ring?
It aids in alignment and absorbs expansion.
Engines using cold stream, or both cold and hot stream reversing, include what?
High bypass turbofans.
On a twin-engine aircraft with fuel-injected reciprocating engines, one fuel flowmeter reads considerably higher than the other in all engine operating configurations. What is the probable cause of this indication?
One or more fuel nozzles are clogged.
A common type of electrically operated oil temperature gauge utilizes either?
A Wheatstone bridge or ratiometer circuit.
The rearward thrust capability of an engine with the thrust reverser system deployed is?
Less than its forward capability.
What type of nuts are used to hold an exhaust system to the cylinders?
Brass or heat-resistant nuts.
Thrust reversers utilizing a pneumatic actuating system usually receive operating pressure from the?
Engine bleed air system.
What basic meter is used to indicate cylinder head temperature in most aircraft?
Galvanometer.
What instrument on a gas turbine engine should be monitored to minimize the possibility of a "hot" start?
Turbine inlet temperature.
The purpose of an exhaust gas analyzer is to indicate the what?
Air-fuel ratio being burned in the cylinders.
On an aircraft that utilizes an exhaust heat exchanger as a source of cabin heat, how should the exhaust system be inspected?
With the heater air shroud removed.
Power recovery turbines used on some reciprocating engines are driven by what?
Velocity of the exhaust gases.
In an aircraft equipped with a pressure-drop type fuel flow indicating system, if one of the injector nozzles becomes restricted, this would cause a decrease in fuel flow with?
An increased fuel flow indication on the gauge.
If the thermocouple leads were inadvertently crossed at installation, what would the cylinder temperature gauge pointer indicate?
Moves off-scale on the zero side of the meter.
Where are the hot and cold junctions located in an engine cylinder temperature indicating system?
The hot junction is located at the cylinder and the cold junction is located at the instrument.
Repair of exhaust system components is not recommended to be accomplished where?
In the field.
Which of the following types of electric motors are commonly used in electric tachometers?
Synchronous motors.