CSYH Practice Cards 4 Flashcards
Random Questions/Statements for Exam Preparation
The pressure exerted on the piston during the power stroke increases as the mass of charge induced …
increases and combustion temperature increases
As the throttle is moved towards the fully open position …
manifold pressure increases and mass flow increases
The volumetric efficiency of an engine depends on …
throttle position,
Ambient Temperature,
Ambient Pressure
RPM
The best action to take at the onset of detonation in an engine is …
select mixture fully rich and decrease the power
The onset of detonation in an engine is indicated by …
vibration,
Rising temperatures and
Reduced indicated air speed
One of the limitations applying to increased RPM for increased power in a piston engine is …
excessive rotor tip speed
The warm up period for an engine prior to take off provides …
proper oil viscosity and uniform heating of engine components
If the engine is over heating during a long climb, an appropriate pilot action would be …
increase indicated airspeed, richen the mixture and if necessary, reduce power
Helicopters fly full rich at all times but this is a generic piston engine question.
If cylinder head temperatures are becoming too low during a long descent, the pilot should …
reduce indicated air speed and increase power
The octane rating of a fuel is a measure of …
it’s resistance to detonation
A horizontally opposed engine should be held at about 1000 RPM after a cold start rather than idle to avoid …
excessive cylinder wear due to poor lubrication at RPM
A radial engine always has an uneven number of cylinders, commonly 5, 7 or 11. This is a necessary design feature to ensure …
uniformly spaced power strokes during the cycle
The function of oil in an engine is to …
clean,
cool and
lubricate
The viscosity of an oil is a measure of
the oil’s resistance to flow
The purpose of an oil cooler bypass is …
to prevent oil from passing through the cooler if it is already cold
If airflow to the oil cooler is interrupted by an obstruction in the duct ….
oil temperature will rise and oil pressure will fall
One cause of high oil temperature and low oil pressure could be …
very low oil level in the sump
The purpose of gearing a propeller (rotor) in an aircraft engine is to permit the propeller (rotor) to turn at …
lower RPM and higher torque than the engine
Operating an engine with too low and oil quantity will produce …
rising oil temperature and dropping oil pressure
During a long climb, the cylinder head temperature becomes too high. This can be rectified by …
richening the mixture to full rich and increasing the climbing indicated air speed
With the majority of opposed engines, the left -hand magneto …
fires the right top and left bottom plugs
In a constant speed engine, the onset of fuel vapor locking would be indicated by …
fluctuating oil pressure
If fuel vaporisation occurs during flight, the appropriate pilot action would be …
operate the fuel boost pump
If the take-off manifold pressure exceeds rated boost in a turbo-charged engine …
detonation and engine damage could result
