Power Engineering 4B Exam
Advantages of a steam engine include: 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 The lubricators.
should cover first and foremost.
One of the first ways to detect the fault in a reciprocating By sound.
engine is:
Thinking of the steam engine and it's construction, what Out of center.
does eccentric mean?
A steam engine piston: Has greater driving force on it at the beginning of it stroke.
Large power production plants tend to be of the thermal The heat cycle they use is the most efficient.
type because they can burn solid fuel and:
On a steam engine, what is the purpose of a flywheel? It dampens speed fluctuations.
It carries the engine over dead center.
What is the main advantage of using the expensive Economy.
properties of steam?
A gasoline engine is a heat engine. What is its working Combustion gases and air mixture.
fluid?
What is the purpose of a turbine thrust bearing? To transfer turbine thrust to the load.
Shaft sealing carbon glands are: Self lubricating
In a turbine with a pressure lubrication system, The high- To the bearings.
pressure oil generally goes to the governor system.
Where is the low-pressure oil led?
, Power Engineering 4B Exam
What holds a turbines carbon packing rings axially? Spring pressure.
Steam pressure.
For what purpose is lubricating oil required on a turbine, To carry heat away from the bearings.
beside lubrication?
In an impulse turbine: The steam pressure is reduced in the nozzles.
Reaction turbines: Have a pressure dropped through the moving and stationary blades.
Blades or Buckets form the rotor flow passages in the impulse turbines.
A steam turbine should trip or shut down when normal 10 to 15%.
operating speed is exceeded by:
The handwheel used to adjust the turbine speed on the Speeder.
governor is known as the.
How many basic types of turbines are there? Two.
A large reaction turbine will have: Steam pressure dropping through moving and stationary sections
Impulse turbines: Have no pressure drop through the moving blades.
What do the stationary nozzles of an impulse turbine Kinetic energy.
convert the thermal energy of the steam into?
The steam turbines exhaust can often supply the process It is free of oil.
with steam because:
When the steam pressure drop occurs in only the An impulse unit.
stationary members or components of a turbine, the
turbine is known as:
Most turbine overspeed trips operate by: Centrifugal force.
A large reaction turbine will have: Steam pressure dropping through moving and stationary section
, Power Engineering 4B Exam
Starting from the boiler and simple power generation One - boiler feed pump
cycle, numbering the following components in the order
in which the steam/water flows through the cycle. Two - condenser
Three- turbine
Four - condensate pump
Five- feed water heater
The great majority of turbine governors are of the Mechanical centrifugal type
Turbine overspeed trip: Will close the steam stop valve to the turbine
Turbine lubricating oil : Can be used to operate the turbine governor
The turbine overspeed trip: Prevents the turbine exceeding the maximum rated speed.
Will close the steam stop valve.
What is the purpose of the nozzles in the turbine? To increase steam velocities
In the turbine with the pressure lubrication system, the To the bearings.
high-pressure oil generally goes to the governor system.
Where is the low pressure oil led?
The overspeed trip of a steam turbine: Is installed on all turbines.
The purpose of the turbine glands is to prevent: Steam escaping from the turbine.
What is the purpose of a turbine thrust bearing? To transfer turbine thrust to the load.
, Power Engineering 4B Exam
When warming up a turbine: Warm-up is done slowly.
The turbine is slowly rotated.
The warm-up must be done so that warping is prevented.
What are some advantages of the pressure system on the Minimal maintenance required.
turbine?
Reliable service.
Long bearing life.
The shrouding installed on the blading of the steam Confine the steam to the blades.
turbine serves to:
When preparing a turbine for starts, why is it warmed up To prevent warping.
slowley?
What gives wood its strength? Cellulose.
Natural draft cooling towers operate most effectively in Where wind is relatively constant.
large open spaces and:
Water contained in the airstream at the discharge of the With drift eliminators.
cooling tower is removed:
Induced draft crossflow cooling tower.
In cooling towers, protective films and sacrificial metals Corrosion.
are two methods of protecting against what?
What is the purpose of the cooling tower? To reduce the temperature of cooling water
For water temperatures up to 70°, increase of To double.
temperatures of 15 to 30° cause corrosion rates and
cooling towers:
Micro organisms require carbon to develop. Where From the cellulose in the wood.
would they get this carbon from in the cooling tower?
Which of the following methods could be used to Induced draft fans.
circulate air in a cooling tower?
Natural draft.
Convection currents.
What could happen if the initial treatment of film forming Severe corrosion in unprotected areas is possible.
chemicals, in the cooling tower, is to weak?
Advantages of a steam engine include: 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 The lubricators.
should cover first and foremost.
One of the first ways to detect the fault in a reciprocating By sound.
engine is:
Thinking of the steam engine and it's construction, what Out of center.
does eccentric mean?
A steam engine piston: Has greater driving force on it at the beginning of it stroke.
Large power production plants tend to be of the thermal The heat cycle they use is the most efficient.
type because they can burn solid fuel and:
On a steam engine, what is the purpose of a flywheel? It dampens speed fluctuations.
It carries the engine over dead center.
What is the main advantage of using the expensive Economy.
properties of steam?
A gasoline engine is a heat engine. What is its working Combustion gases and air mixture.
fluid?
What is the purpose of a turbine thrust bearing? To transfer turbine thrust to the load.
Shaft sealing carbon glands are: Self lubricating
In a turbine with a pressure lubrication system, The high- To the bearings.
pressure oil generally goes to the governor system.
Where is the low-pressure oil led?
, Power Engineering 4B Exam
What holds a turbines carbon packing rings axially? Spring pressure.
Steam pressure.
For what purpose is lubricating oil required on a turbine, To carry heat away from the bearings.
beside lubrication?
In an impulse turbine: The steam pressure is reduced in the nozzles.
Reaction turbines: Have a pressure dropped through the moving and stationary blades.
Blades or Buckets form the rotor flow passages in the impulse turbines.
A steam turbine should trip or shut down when normal 10 to 15%.
operating speed is exceeded by:
The handwheel used to adjust the turbine speed on the Speeder.
governor is known as the.
How many basic types of turbines are there? Two.
A large reaction turbine will have: Steam pressure dropping through moving and stationary sections
Impulse turbines: Have no pressure drop through the moving blades.
What do the stationary nozzles of an impulse turbine Kinetic energy.
convert the thermal energy of the steam into?
The steam turbines exhaust can often supply the process It is free of oil.
with steam because:
When the steam pressure drop occurs in only the An impulse unit.
stationary members or components of a turbine, the
turbine is known as:
Most turbine overspeed trips operate by: Centrifugal force.
A large reaction turbine will have: Steam pressure dropping through moving and stationary section
, Power Engineering 4B Exam
Starting from the boiler and simple power generation One - boiler feed pump
cycle, numbering the following components in the order
in which the steam/water flows through the cycle. Two - condenser
Three- turbine
Four - condensate pump
Five- feed water heater
The great majority of turbine governors are of the Mechanical centrifugal type
Turbine overspeed trip: Will close the steam stop valve to the turbine
Turbine lubricating oil : Can be used to operate the turbine governor
The turbine overspeed trip: Prevents the turbine exceeding the maximum rated speed.
Will close the steam stop valve.
What is the purpose of the nozzles in the turbine? To increase steam velocities
In the turbine with the pressure lubrication system, the To the bearings.
high-pressure oil generally goes to the governor system.
Where is the low pressure oil led?
The overspeed trip of a steam turbine: Is installed on all turbines.
The purpose of the turbine glands is to prevent: Steam escaping from the turbine.
What is the purpose of a turbine thrust bearing? To transfer turbine thrust to the load.
, Power Engineering 4B Exam
When warming up a turbine: Warm-up is done slowly.
The turbine is slowly rotated.
The warm-up must be done so that warping is prevented.
What are some advantages of the pressure system on the Minimal maintenance required.
turbine?
Reliable service.
Long bearing life.
The shrouding installed on the blading of the steam Confine the steam to the blades.
turbine serves to:
When preparing a turbine for starts, why is it warmed up To prevent warping.
slowley?
What gives wood its strength? Cellulose.
Natural draft cooling towers operate most effectively in Where wind is relatively constant.
large open spaces and:
Water contained in the airstream at the discharge of the With drift eliminators.
cooling tower is removed:
Induced draft crossflow cooling tower.
In cooling towers, protective films and sacrificial metals Corrosion.
are two methods of protecting against what?
What is the purpose of the cooling tower? To reduce the temperature of cooling water
For water temperatures up to 70°, increase of To double.
temperatures of 15 to 30° cause corrosion rates and
cooling towers:
Micro organisms require carbon to develop. Where From the cellulose in the wood.
would they get this carbon from in the cooling tower?
Which of the following methods could be used to Induced draft fans.
circulate air in a cooling tower?
Natural draft.
Convection currents.
What could happen if the initial treatment of film forming Severe corrosion in unprotected areas is possible.
chemicals, in the cooling tower, is to weak?
