Shared Flashcard Set

Details

A+P oral final
Engine Instument Systems
31
Aviation
Professional
03/08/2010

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Cards

Term
What are three types of flow indicating systems used for turbine engines
Definition
vane type flow, synchronous mass-type flow meters, and electronic motorless mass flow meters
Term
What do mass flow systems measure
Definition
the mass of the flow
Term
In what units is an electronic motorless mass flow meter system calibrated
Definition
Pounds per hour of fuel flow
Term
What is indicated in a turbine engine if the fuel flow for all conditions is high
Definition
if there are instrument abnormalities, there are possibly damaged turbine components
Term
Who is authorized to repair a fuel flow indicating system
Definition
FAA approved repair station
Term
where can you find the electrical power requirements for a fuel flow indicating system
Definition
in maintenance manual
Term
where in the fuel system is the fuel flow transmitter located
Definition
between the fuel control and the fuel nozzles
Term
What type of instrument system is used for measuring oil temperature
Definition
a ratiometer type system
Term
What type of instrument system is used for measuring cylinder head temperature and exaust gas temperature
Definition
thermocouple system
Term
What should a thermocouple cylinder head temperature indicator read when the engine is cold
Definition
the same temp as OAT gage
Term
what is critical in the installation of thermocouple leads for a cylinderhead temperature indicator, the length of the leads or thier resistance
Definition
resistance is critical
Term
what should ratiometer temperature indicator read when the electrical power is off
Definition
the pointer should be off scale on the low side
Term
what kind of drag tachometer is used on most small single engine airplanes
Definition
a magnetic drag tachometer
Term
what would likely cause the pointer of a magnetic drag tachometer to oscillate
Definition
either a dry cable connecting the indicator to the engine, or a kink in the cable
Term
is it permissible for a mechanic with an airframe and powerplant rating to replace the tachometer cable for a magnetic drag tachometer
Definition
yes this does not constitute a repair to an instument
Term
what kind of tachometer is used on most large multi engine airplanes
Definition
a three phase AC electric tachometer
Term
what is measured to indicate the engine rpm with a three phase AC electric tachometer
Definition
the frequency of the AC the tachometer generator produces
Term
What kind of mechanism is used to measure oil pressure
Definition
A bourdon tube
Term
What kind of indicator mechanism is used to measure manifold pressure
Definition
a differential bellows
Term
what should a manifold pressure gage read when the engine is not operating
Definition
the existing barometric pressure as indicated on the altimeter
Term
what type of fitting is used to connect an oil pressure gage to the engine
Definition
a fitting with a restrictor that smooths out the pulsations
Term
what is used to fill the line between a fuel pressure gage and the fuel metering system
Definition
a light oil such as kerosine
Term
What could cause a fuel pressure gage to fluctuate
Definition
The loss of the light oil in the line between the gage and the engine
Term
what is the range of pressure needed for a fuel pressure gage used with a float caburator
Definition
1 to 25 psi
Term
what instrument monitors carburator air inlet temperature
Definition
the carb air temp gauge
Term
where is carburator air temp measured
Definition
at carb air inlet
Term
what instrument measures fuel flow
Definition
flowmeter
Term
how is fuel pressure gauge calibrated
Definition
psi
Term
how is manfold pressure indicated
Definition
inches of mercury
Term
which engine instrument is used to show rotational speed of engine
Definition
tachometer
Term
what instument is used ro monitor the operating temperature of engine cylinders
Definition
cylinder head temp indicator
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