Power Engineering 4B Exam
Questions & Answers (Grade A+)
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.
,Power Engineering 4B Exam
Questions & Answers (Grade A+)
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.
,Power Engineering 4B Exam
Questions & Answers (Grade A+)
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.
, Power Engineering 4B Exam
Questions & Answers (Grade A+)
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.
Questions & Answers (Grade A+)
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.
,Power Engineering 4B Exam
Questions & Answers (Grade A+)
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.
,Power Engineering 4B Exam
Questions & Answers (Grade A+)
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.
, Power Engineering 4B Exam
Questions & Answers (Grade A+)
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.
