WorksheetsPowerPlant
Total questions: 10
Worksheet time: 10mins
A piston engine compression ratio is the ratio of the:
swept volume to the clearance volume.
total volume to the swept volume.
total volume to the clearance volume.
clearance volume to the swept volume.
The thermal efficiency of a piston engine is approximately:
50%
90%
30%
75%
What is the total volume in the cylinder of a four stroke engine?
Swept volume minus clearance volume.
A value equal to the cubic capacity.
Swept volume plus clearance volume.
Volume between TDC and BDC.
Specific fuel consumption is defined as the:
designed fuel consumption for a given RPM.
quantity of fuel required to run the engine for one minute at maximum operating conditions.
mass of fuel required to produce unit power for unit time.
maximum fuel consumption of the aircraft.
In a convergent duct:
the pressure and velocity increase, the temperature decreases
the pressure and temperature decrease, the velocity increases
the temperature and velocity increase, the pressure decreases
the pressure and velocity remain constant, the temperature decreases
The term 'swept volume' defines the volume :
displaced by the piston during a single stroke.
above the piston when it is at the top dead centre.
above the piston when it is at the bottom dead centre.
displaced by the piston during a full cycle.
The compression relation for piston engines refers to :
volumes.
areas.
areas and volumes.
pressures.
The power output of a piston engine is directly proportional to:
torque and RPM.
work and velocity.
force and distance.
exhaust back pressure and RPM.
The correct working cycle of a four-stroke engine is:
exhaust, power, induction, compression
compression, power, exhaust, induction
induction, power, compression, exhaust
power, exhaust, compression, induction
The degrees of rotation to complete a full cycle on a reciprocating engine will be:
180
360
720
80
