Engine Instruments
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
Why is Engine pre oiling important?
Helps remove air in the oil passages.
What is an Ignition System operational check known as?
Magneto check.
What instrument or tool is used to perform a cylinder compression test?
A differential pressure tester
What does the exhaust gas analyzer indicate?
The air-fuel ratio being burned in the cylinders
What type of electric motors are commonly used in electric tachometers?
Synchronous motors
What does the term "Engine Instruments" usually include?
All instruments required to measure and indicate the functioning of the powerplant.
What factors effect normal combustion?
Air-fuel mixture & proper ignition timing.
What is Detonation?
Spontaneous combustion of the unburned charge: Violently explode
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.
A common type of electrically operated oil temperature gauge utilizes either of these two.
Wheatstone bridge or ratiometer circuit.
Before starting an engine, what should the manifold pressure gauge read?
Barometric Pressure
Why are propeller checks performed?
To ensure proper operation of the pitch control and the pitch change mechanism.
What is pre-ignition?
When combustion takes place within the cylinder before the timed spark jumps across the spark plug terminals.
What basic meter is used to indicate cylinder head temperature in most aircraft?
Galvanometer
What unit in a tachometer system sends information to the indicator?
The three-phase AC generator.
What is to be observed during engine warm up?
The instruments associated with engine operation
What 4 factors may effect the accuracy of a power check?
Wind, Atmospheric temperatures, Engine and Induction system temp, oil temperature.
What is backfiring?
Lean mixture burning too slow and ignites the incoming fuel air mixture.
Thermocouple-type temperature indicating systems are self contained. What does this mean for operation?
It requires no external power source.
The EGT gauge used with reciprocating engines is primarily used to furnish temperature readings in order to do what?
Obtain the best mixture setting for fuel efficiency.
What is the importance of an Ignition system operational check?
To ensure maximum mag drop does not exceed that specified by the manufacturer.
What is determined during a cold cylinder check?
The operating characteristics of each cylinder of an air cooled engine
What is after firing?
Rich mixture burns slow and mixes withe the outside air and ignites in the exhaust system