Power Engineering 4B UPDATED
ACTUAL Questions and CORRECT
Answers
The steam engine will have the steam supply to the cylinder shut off once the piston has
travelled: - CORRECT ANSWER - 25 to 35% of its stroke.
A prime mover is: - CORRECT ANSWER - Steam turbine.
A single device which converts enough will source of energy into mechanical motion is a/an: -
CORRECT ANSWER - A prime mover.
Advantages of a steam engine include: - CORRECT 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.
A routine daily maintenance operating steam engine should cover first and foremost. -
CORRECT ANSWER - The lubricators.
One of the first ways to detect the fault in a reciprocating engine is: - CORRECT
ANSWER - By sound.
Thinking of the steam engine and it's construction, what does eccentric mean? - CORRECT
ANSWER - Out of center.
A steam engine piston: - CORRECT ANSWER - Has greater driving force on it at the
beginning of it stroke.
,Large power production plants tend to be of the thermal type because they can burn solid fuel
and: - CORRECT ANSWER - The heat cycle they use is the most efficient.
On a steam engine, what is the purpose of a flywheel? - CORRECT ANSWER - It
dampens speed fluctuations.
It carries the engine over dead center.
What is the main advantage of using the expensive properties of steam? - CORRECT
ANSWER - Economy.
A gasoline engine is a heat engine. What is its working fluid? - CORRECT ANSWER -
Combustion gases and air mixture.
What is the purpose of a turbine thrust bearing? - CORRECT ANSWER - To transfer
turbine thrust to the load.
Shaft sealing carbon glands are: - CORRECT ANSWER - Self lubricating
In a turbine with a pressure lubrication system, The high-pressure oil generally goes to the
governor system. Where is the low-pressure oil led? - CORRECT ANSWER - To the
bearings.
What holds a turbines carbon packing rings axially? - CORRECT ANSWER - Spring
pressure.
Steam pressure.
,For what purpose is lubricating oil required on a turbine, beside lubrication? - CORRECT
ANSWER - To carry heat away from the bearings.
In an impulse turbine: - CORRECT ANSWER - The steam pressure is reduced in the
nozzles.
Reaction turbines: - CORRECT ANSWER - Have a pressure dropped through the moving
and stationary blades.
Blades or - CORRECT ANSWER - Buckets form the rotor flow passages in the impulse
turbines.
A steam turbine should trip or shut down when normal operating speed is exceeded by: -
CORRECT ANSWER - 10 to 15%.
The handwheel used to adjust the turbine speed on the governor is known as the. - CORRECT
ANSWER - Speeder.
How many basic types of turbines are there? - CORRECT ANSWER - Two.
A large reaction turbine will have: - CORRECT ANSWER - Steam pressure dropping
through moving and stationary sections
Impulse turbines: - CORRECT ANSWER - Have no pressure drop through the moving
blades.
What do the stationary nozzles of an impulse turbine convert the thermal energy of the steam
into? - CORRECT ANSWER - Kinetic energy.
The steam turbines exhaust can often supply the process with steam because: - CORRECT
ANSWER - It is free of oil.
, When the steam pressure drop occurs in only the stationary members or components of a turbine,
the turbine is known as: - CORRECT ANSWER - An impulse unit.
Most turbine overspeed trips operate by: - CORRECT ANSWER - Centrifugal force.
A large reaction turbine will have: - CORRECT ANSWER - Steam pressure dropping
through moving and stationary section
Starting from the boiler and simple power generation cycle, numbering the following
components in the order in which the steam/water flows through the cycle. - CORRECT
ANSWER - One - boiler feed pump
Two - condenser
Three- turbine
Four - condensate pump
Five- feed water heater
The great majority of turbine governors are of the - CORRECT ANSWER - Mechanical
centrifugal type
Turbine overspeed trip: - CORRECT ANSWER - Will close the steam stop valve to the
turbine
Turbine lubricating oil : - CORRECT ANSWER - Can be used to operate the turbine
governor
ACTUAL Questions and CORRECT
Answers
The steam engine will have the steam supply to the cylinder shut off once the piston has
travelled: - CORRECT ANSWER - 25 to 35% of its stroke.
A prime mover is: - CORRECT ANSWER - Steam turbine.
A single device which converts enough will source of energy into mechanical motion is a/an: -
CORRECT ANSWER - A prime mover.
Advantages of a steam engine include: - CORRECT 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.
A routine daily maintenance operating steam engine should cover first and foremost. -
CORRECT ANSWER - The lubricators.
One of the first ways to detect the fault in a reciprocating engine is: - CORRECT
ANSWER - By sound.
Thinking of the steam engine and it's construction, what does eccentric mean? - CORRECT
ANSWER - Out of center.
A steam engine piston: - CORRECT ANSWER - Has greater driving force on it at the
beginning of it stroke.
,Large power production plants tend to be of the thermal type because they can burn solid fuel
and: - CORRECT ANSWER - The heat cycle they use is the most efficient.
On a steam engine, what is the purpose of a flywheel? - CORRECT ANSWER - It
dampens speed fluctuations.
It carries the engine over dead center.
What is the main advantage of using the expensive properties of steam? - CORRECT
ANSWER - Economy.
A gasoline engine is a heat engine. What is its working fluid? - CORRECT ANSWER -
Combustion gases and air mixture.
What is the purpose of a turbine thrust bearing? - CORRECT ANSWER - To transfer
turbine thrust to the load.
Shaft sealing carbon glands are: - CORRECT ANSWER - Self lubricating
In a turbine with a pressure lubrication system, The high-pressure oil generally goes to the
governor system. Where is the low-pressure oil led? - CORRECT ANSWER - To the
bearings.
What holds a turbines carbon packing rings axially? - CORRECT ANSWER - Spring
pressure.
Steam pressure.
,For what purpose is lubricating oil required on a turbine, beside lubrication? - CORRECT
ANSWER - To carry heat away from the bearings.
In an impulse turbine: - CORRECT ANSWER - The steam pressure is reduced in the
nozzles.
Reaction turbines: - CORRECT ANSWER - Have a pressure dropped through the moving
and stationary blades.
Blades or - CORRECT ANSWER - Buckets form the rotor flow passages in the impulse
turbines.
A steam turbine should trip or shut down when normal operating speed is exceeded by: -
CORRECT ANSWER - 10 to 15%.
The handwheel used to adjust the turbine speed on the governor is known as the. - CORRECT
ANSWER - Speeder.
How many basic types of turbines are there? - CORRECT ANSWER - Two.
A large reaction turbine will have: - CORRECT ANSWER - Steam pressure dropping
through moving and stationary sections
Impulse turbines: - CORRECT ANSWER - Have no pressure drop through the moving
blades.
What do the stationary nozzles of an impulse turbine convert the thermal energy of the steam
into? - CORRECT ANSWER - Kinetic energy.
The steam turbines exhaust can often supply the process with steam because: - CORRECT
ANSWER - It is free of oil.
, When the steam pressure drop occurs in only the stationary members or components of a turbine,
the turbine is known as: - CORRECT ANSWER - An impulse unit.
Most turbine overspeed trips operate by: - CORRECT ANSWER - Centrifugal force.
A large reaction turbine will have: - CORRECT ANSWER - Steam pressure dropping
through moving and stationary section
Starting from the boiler and simple power generation cycle, numbering the following
components in the order in which the steam/water flows through the cycle. - CORRECT
ANSWER - One - boiler feed pump
Two - condenser
Three- turbine
Four - condensate pump
Five- feed water heater
The great majority of turbine governors are of the - CORRECT ANSWER - Mechanical
centrifugal type
Turbine overspeed trip: - CORRECT ANSWER - Will close the steam stop valve to the
turbine
Turbine lubricating oil : - CORRECT ANSWER - Can be used to operate the turbine
governor
