engine instrument systems Flashcards
what does a tachometer on a reciprocating engine indicate
engine RPM, crankshaft speed
where would a carburetor temperature bulb be located
in the ram air intake duct
what is the fuel pressure range on a float type carburetor
3 to 5 psi
name the basic components of a fuel indicator system
transmitter and indicator
why is fuel flow monitored
to determine fuel consumption and engine performance
what unit of measurement is generally used to indicate fuel flow
pounds or gallons per hour
what does the manifold gauge indicate and how is it calibrated
it measures the absolute pressure in the engine manifold and is calibrated in inches of mercury
what directly controls manifold pressure
throttle opening and engine (RPM)
where should the thermocouple be installed on a reciprocating engine using a single probe cylinder head temperature system
on the hottest cylinder
during engine operation where should the propeller control be set when checking the manifold pressure
low pitch, high RPM
what are the possible indications of an oil pressure transmitter or indicator malfunction
A severe or sudden drop in oil pressure while the oil temperature remains normal and the oil supply remains full
is the aircraft electrical system required to power a cylinder head temperature gauge
no, a thermocouple is used as the electrical source
in reference to a carbureted reciprocating engine, where is a fuel flow indicating system generally connected in an engine fuel system
between the engine fuel pump and carburetor
on an engine equipped with a fixed pitch propeller, what controls both manifold pressure and engine RPM
the throttle control
what are turbine engine tachometer gauges designed to indicate
percentage of compressor RPM
what does turbine engine exhaust gas temperature ( EGT ) indicate?
it is the average temperature of turbine discharge gases
how is turbine engine EGT obtained
usually by several thermocouples spaced at intervals around the exhaust duct perimeter near the turbine exit
what pressures are measured to obtain engine pressure ratio
total inlet pressure and total turbine exhaust pressure
what is the torque being developed by a turboprop engine an indication of
shaft horsepower
what is the electrical source for a cylinder head temperature system
a thermocouple
what is the possible cause when oil pressure drops off severely, oil supply remains full, and oil temperature is normal
oil pressure transmitter or indicator malfunction
how can turbine engine EGT system be checked without running the engine
by checking the resistance of thermocouples and circuits
