POWER ENGINEERING 4B ACTUAL
2026 MIDTERM EXAM GRADED A+
QUESTIONOne of the first ways to detect the fault in a reciprocating engine is: - answer-By sound.
QUESTIONThinking of the steam engine and it's construction, what does eccentric mean? - answer-Out of
center.
QUESTIONA steam engine piston: - answer-Has greater driving force on it at the beginning of it stroke.
QUESTIONLarge power production plants tend to be of the thermal type because they can burn solid fuel
and: - answer-The heat cycle they use is the most efficient.
The steam engine will have the steam supply to the cylinder shut off once the piston has travelled: -
answer-25 to 35% of its stroke.
QUESTIONA prime mover is: - answer-Steam turbine.
QUESTIONA single device which converts enough will source of energy into mechanical motion is a/an: -
answer-A prime mover.
QUESTIONAdvantages of a steam engine include: - answer-It is possible to change the direction of rotation
without the use of gearing.
They are simple and rugged.
,They have a slow rotational speed without the need for reduction gearing.
QUESTIONA routine daily maintenance operating steam engine should cover first and foremost. - answer-
The lubricators.
QUESTIONOn a steam engine, what is the purpose of a flywheel? - answer-It dampens speed fluctuations.
It carries the engine over dead center.
QUESTIONWhat is the main advantage of using the expensive properties of steam? - answer-Economy.
QUESTIONA gasoline engine is a heat engine. What is its working fluid? - answer-Combustion gases and
air mixture.
QUESTIONImpulse turbines: - answer-Have no pressure drop through the moving blades.
QUESTIONWhat do the stationary nozzles of an impulse turbine convert the thermal energy of the steam
into? - answer-Kinetic energy.
QUESTIONThe steam turbines exhaust can often supply the process with steam because: - answer-It is
free of oil.
QUESTIONWhen the steam pressure drop occurs in only the stationary members or components of a
turbine, the turbine is known as: - answer-An impulse unit.
QUESTIONMost turbine overspeed trips operate by: - answer-Centrifugal force.
,QUESTIONA large reaction turbine will have: - answer-Steam pressure dropping through moving and
stationary section
QUESTIONStarting from the boiler and simple power generation cycle, numbering the following
components in the order in which the steam/water flows through the cycle. - answer-One - boiler feed pump
Two - condenser
Three- turbine
Four - condensate pump
Five- feed water heater
QUESTIONThe great majority of turbine governors are of the - answer-Mechanical centrifugal type
QUESTIONTurbine overspeed trip: - answer-Will close the steam stop valve to the turbine
QUESTIONTurbine lubricating oil : - answer-Can be used to operate the turbine governor
QUESTIONThe turbine overspeed trip: - answer-Prevents the turbine exceeding the maximum rated speed.
Will close the steam stop valve.
QUESTIONWhat is the purpose of the nozzles in the turbine? - answer-To increase steam velocities
QUESTIONIn the turbine with the pressure lubrication system, the high-pressure oil generally goes to the
governor system. Where is the low pressure oil led? - answer-To the bearings.
, QUESTIONThe overspeed trip of a steam turbine: - answer-Is installed on all turbines.
QUESTIONThe purpose of the turbine glands is to prevent: - answer-Steam escaping from the turbine.
QUESTIONWhat is the purpose of a turbine thrust bearing? - answer-To transfer turbine thrust to the load.
QUESTIONWhat is the purpose of a turbine thrust bearing? - answer-To transfer turbine thrust to the load.
QUESTIONShaft sealing carbon glands are: - answer-Self lubricating
QUESTIONIn a turbine with a pressure lubrication system, The high-pressure oil generally goes to the
governor system. Where is the low-pressure oil led? - answer-To the bearings.
QUESTIONWhat holds a turbines carbon packing rings axially? - answer-Spring pressure.
Steam pressure.
QUESTIONFor what purpose is lubricating oil required on a turbine, beside lubrication? - answer-To carry
heat away from the bearings.
QUESTIONIn an impulse turbine: - answer-The steam pressure is reduced in the nozzles.
QUESTIONReaction turbines: - answer-Have a pressure dropped through the moving and stationary
blades.
QUESTIONBlades or - answer-Buckets form the rotor flow passages in the impulse turbines.
2026 MIDTERM EXAM GRADED A+
QUESTIONOne of the first ways to detect the fault in a reciprocating engine is: - answer-By sound.
QUESTIONThinking of the steam engine and it's construction, what does eccentric mean? - answer-Out of
center.
QUESTIONA steam engine piston: - answer-Has greater driving force on it at the beginning of it stroke.
QUESTIONLarge power production plants tend to be of the thermal type because they can burn solid fuel
and: - answer-The heat cycle they use is the most efficient.
The steam engine will have the steam supply to the cylinder shut off once the piston has travelled: -
answer-25 to 35% of its stroke.
QUESTIONA prime mover is: - answer-Steam turbine.
QUESTIONA single device which converts enough will source of energy into mechanical motion is a/an: -
answer-A prime mover.
QUESTIONAdvantages of a steam engine include: - answer-It is possible to change the direction of rotation
without the use of gearing.
They are simple and rugged.
,They have a slow rotational speed without the need for reduction gearing.
QUESTIONA routine daily maintenance operating steam engine should cover first and foremost. - answer-
The lubricators.
QUESTIONOn a steam engine, what is the purpose of a flywheel? - answer-It dampens speed fluctuations.
It carries the engine over dead center.
QUESTIONWhat is the main advantage of using the expensive properties of steam? - answer-Economy.
QUESTIONA gasoline engine is a heat engine. What is its working fluid? - answer-Combustion gases and
air mixture.
QUESTIONImpulse turbines: - answer-Have no pressure drop through the moving blades.
QUESTIONWhat do the stationary nozzles of an impulse turbine convert the thermal energy of the steam
into? - answer-Kinetic energy.
QUESTIONThe steam turbines exhaust can often supply the process with steam because: - answer-It is
free of oil.
QUESTIONWhen the steam pressure drop occurs in only the stationary members or components of a
turbine, the turbine is known as: - answer-An impulse unit.
QUESTIONMost turbine overspeed trips operate by: - answer-Centrifugal force.
,QUESTIONA large reaction turbine will have: - answer-Steam pressure dropping through moving and
stationary section
QUESTIONStarting from the boiler and simple power generation cycle, numbering the following
components in the order in which the steam/water flows through the cycle. - answer-One - boiler feed pump
Two - condenser
Three- turbine
Four - condensate pump
Five- feed water heater
QUESTIONThe great majority of turbine governors are of the - answer-Mechanical centrifugal type
QUESTIONTurbine overspeed trip: - answer-Will close the steam stop valve to the turbine
QUESTIONTurbine lubricating oil : - answer-Can be used to operate the turbine governor
QUESTIONThe turbine overspeed trip: - answer-Prevents the turbine exceeding the maximum rated speed.
Will close the steam stop valve.
QUESTIONWhat is the purpose of the nozzles in the turbine? - answer-To increase steam velocities
QUESTIONIn the turbine with the pressure lubrication system, the high-pressure oil generally goes to the
governor system. Where is the low pressure oil led? - answer-To the bearings.
, QUESTIONThe overspeed trip of a steam turbine: - answer-Is installed on all turbines.
QUESTIONThe purpose of the turbine glands is to prevent: - answer-Steam escaping from the turbine.
QUESTIONWhat is the purpose of a turbine thrust bearing? - answer-To transfer turbine thrust to the load.
QUESTIONWhat is the purpose of a turbine thrust bearing? - answer-To transfer turbine thrust to the load.
QUESTIONShaft sealing carbon glands are: - answer-Self lubricating
QUESTIONIn a turbine with a pressure lubrication system, The high-pressure oil generally goes to the
governor system. Where is the low-pressure oil led? - answer-To the bearings.
QUESTIONWhat holds a turbines carbon packing rings axially? - answer-Spring pressure.
Steam pressure.
QUESTIONFor what purpose is lubricating oil required on a turbine, beside lubrication? - answer-To carry
heat away from the bearings.
QUESTIONIn an impulse turbine: - answer-The steam pressure is reduced in the nozzles.
QUESTIONReaction turbines: - answer-Have a pressure dropped through the moving and stationary
blades.
QUESTIONBlades or - answer-Buckets form the rotor flow passages in the impulse turbines.
