Inspect Check Troubleshoot Everything Flashcards
What kind of indicating system is used to measure oil temperature in a small single-engine general aviation airplane?
A sealed system in which a bulb, partially filled with a highly volatile liquid, is installed inside the oil strainer
What type of instrument system is used for measuring cylinder-head temperature and exhaust gas temperature?
A thermocouple system
What kind of electrical instrument system is used for measuring oil temperature?
A ratiometer-type system
What should a thermocouple cylinder-head temperature indicator read when the engine is cold?
The same as the outside air temperature gage
What is critical in the installation of the thermocouple leads for a cylinder head temperature indicator the length of the leads or their resistance?
The resistance is critical, it must have the resistance specified on the indicator. This is usually 2 or 8 ohms
What should a ratio meter temperature indicator read when the electrical power is off?
The pointer should be off on the low side
What kind of tachometer is used on most small single engine airplanes?
A magnetic drag tachometer that is similar to an automobile speedometer
What would likely cause the pointer of a magnetic drag tachometer to oscillate?
Either a dry cable connecting the indicator to the engine or a link in the cable housing
Is it permissible for a mechanic with an airframe and powerplant rating to replace the tachometer cable for a magnetic drag tachometer?
Yes, this does not constitute a repair to an instrument
What kind of tachometer is used on most large multi-engine airplanes?
A three-phase AC electric tachometer
What is measured to indicate the engine RPM with a three-phase AC electric tachometer?
The frequency of the AC the tachometer generator produces
What kind of indicator mechanism is used to measure manifold pressure?
A differential bellows
What should a manifold pressure gage read when the engine is not operating?
The existing barometric pressure as indicated on the altimeter barometric scale when the altimeter pointers are set to the surveyed field elevation
What type of fitting us used to connect an oil pressure gage to the engine?
A fitting with a restrictor that smoothes out pulsations and prevents a break in the indicator line, causing a serious loss of engine oil
What is used to fill the line between a fuel gage and the fuel metering system?
A light oil such as kerosine
