Power Engineering 4B Exam Questions with Verified Solutions Graded A+
The steam engine will have the steam supply to the cylinder shut off once the piston has
travelled: - Answers 25 to 35% of its stroke.
A prime mover is: - Answers Steam turbine.
A single device which converts enough will source of energy into mechanical motion is a/an: -
Answers A prime mover.
Advantages of a steam engine include: - Answers 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. - Answers
The lubricators.
One of the first ways to detect the fault in a reciprocating engine is: - Answers By sound.
Thinking of the steam engine and it's construction, what does eccentric mean? - Answers Out of
center.
A steam engine piston: - Answers 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: - Answers The heat cycle they use is the most efficient.
On a steam engine, what is the purpose of a flywheel? - Answers It dampens speed fluctuations.
It carries the engine over dead center.
What is the main advantage of using the expensive properties of steam? - Answers Economy.
A gasoline engine is a heat engine. What is its working fluid? - Answers Combustion gases and
air mixture.
What is the purpose of a turbine thrust bearing? - Answers To transfer turbine thrust to the load.
Shaft sealing carbon glands are: - Answers 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? - Answers To the bearings.
What holds a turbines carbon packing rings axially? - Answers Spring pressure.
Steam pressure.
For what purpose is lubricating oil required on a turbine, beside lubrication? - Answers To carry
heat away from the bearings.
In an impulse turbine: - Answers The steam pressure is reduced in the nozzles.
Reaction turbines: - Answers Have a pressure dropped through the moving and stationary
blades.
Blades or - Answers 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: -
Answers 10 to 15%.
The handwheel used to adjust the turbine speed on the governor is known as the. - Answers
Speeder.
How many basic types of turbines are there? - Answers Two.
A large reaction turbine will have: - Answers Steam pressure dropping through moving and
stationary sections
Impulse turbines: - Answers 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? - Answers Kinetic energy.
The steam turbines exhaust can often supply the process with steam because: - Answers 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: - Answers An impulse unit.
Most turbine overspeed trips operate by: - Answers Centrifugal force.
A large reaction turbine will have: - Answers 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. - Answers One -
The steam engine will have the steam supply to the cylinder shut off once the piston has
travelled: - Answers 25 to 35% of its stroke.
A prime mover is: - Answers Steam turbine.
A single device which converts enough will source of energy into mechanical motion is a/an: -
Answers A prime mover.
Advantages of a steam engine include: - Answers 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. - Answers
The lubricators.
One of the first ways to detect the fault in a reciprocating engine is: - Answers By sound.
Thinking of the steam engine and it's construction, what does eccentric mean? - Answers Out of
center.
A steam engine piston: - Answers 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: - Answers The heat cycle they use is the most efficient.
On a steam engine, what is the purpose of a flywheel? - Answers It dampens speed fluctuations.
It carries the engine over dead center.
What is the main advantage of using the expensive properties of steam? - Answers Economy.
A gasoline engine is a heat engine. What is its working fluid? - Answers Combustion gases and
air mixture.
What is the purpose of a turbine thrust bearing? - Answers To transfer turbine thrust to the load.
Shaft sealing carbon glands are: - Answers 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? - Answers To the bearings.
What holds a turbines carbon packing rings axially? - Answers Spring pressure.
Steam pressure.
For what purpose is lubricating oil required on a turbine, beside lubrication? - Answers To carry
heat away from the bearings.
In an impulse turbine: - Answers The steam pressure is reduced in the nozzles.
Reaction turbines: - Answers Have a pressure dropped through the moving and stationary
blades.
Blades or - Answers 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: -
Answers 10 to 15%.
The handwheel used to adjust the turbine speed on the governor is known as the. - Answers
Speeder.
How many basic types of turbines are there? - Answers Two.
A large reaction turbine will have: - Answers Steam pressure dropping through moving and
stationary sections
Impulse turbines: - Answers 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? - Answers Kinetic energy.
The steam turbines exhaust can often supply the process with steam because: - Answers 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: - Answers An impulse unit.
Most turbine overspeed trips operate by: - Answers Centrifugal force.
A large reaction turbine will have: - Answers 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. - Answers One -
