Power Engineering 4B Review Questions with complete 2024/2025
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Module
BOIE 8010
Institution
BOIE 8010
Power Engineering 4B Review Questions with complete 2024/2025 Power Engineering 4B Review
d
A treatment method that is often used in conjunction with settling tanks is
a) Zeolite softening
b) De-Mineralizing
c) Lime soda softening
d) Filtration
b
A stem engines
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Power Engineering 4B Review
d
A treatment method that is often used in conjunction with settling tanks is
a) Zeolite softening
b) De-Mineralizing
c) Lime soda softening
d) Filtration
b
A stem engines crosshead
a) Imparts angular motion to is piston rod
b) Converts linear motion of the piston rod into angular motion
c) Does not require any lubrication
d) is often called Coegudeon
c
Which of the following steam traps are recommended for use with steam coils
operating at low or medium steam pressure
a) Inverted bucket trap
,b) Thermostatic trap
c) Float and thermostatic trap
d) Impulse Trap
d
A gas turbine is most efficient when
a) Both shafts run at the same time
b) The combustion chamber is kept cool
c) The ambient air temperature is low
d) Operated at the highest combustion temperature that the construction
materials permit
d
improper location of the expansion tank in relation to the circulating pump can
cause
a) De-pressurization
b) The pump motor can be overloaded
c) Over-pressurization of the expansion tank
d) Vapour bubbles to form in the circulating pump
c
Specific humidity is the
,a) Ratio of the actual amount of water vapour present in air, to the amount of
water vapour that the air can contain when it is saturated
b) Percentage of moisture in air
c) Actual moisture content of air expressed as kg of moisture per kg of dry air
d) Ratio or dry air to moisture
b
The area around the pump shaft , where packing material is placed to reduce
leakage past the shaft, is known as
a) Seal box
b) Stuffing box
c) Seal cage
d) Wearing ring
c
Degradation of heat transfer fluid of a hot oil system will begin to occur if
a) The oil becomes to viscous
b) The oil is allowed to churn in the circulating pump
c) The oil temperature is above a specified range, for an extended period of
time
d) The oil filter is not serviced regularly
, c
The combustion chamber of a gas turbine
a) Increases the density of compressed air
b) Must be water cooled to protect against high temperature
c) is where fuel is added to air , and burned
d) Preheats the combustion air before it is compressed
d
between a valve and a pushrod there is a
a) Connecting rod
b) Camshaft
c) Wrist pin
d) Rocker arm
c
How should the operating limit pressure control switch on a steam boiler be
tested
a) Jumper the contacts and observe when the boiler shuts off
b) Remove the control from the boiler and test with a pressure source and
master pressure gauge
c) Observe that the boiler cuts in and cuts out during routine boiler operation
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