Power engineering Class 4 Part B Exam Questions With Complete Solutions
b - (ANSWER)A prime mover is
a) an electric motor
b) a steam turbine
c) a centrifugal pump
d) an air compressor
e) a boiler
c - (ANSWER)Large power production plants tend to be of the thermal type because they can burn solid
fuels and:
a) they are the least expensive to build
b) the noise level is much less than internal combustion
engines
c) the heat cycle they use is the most efficient
d) solid fuels are the most plentiful and cheapest
e) require the least amount of manpower
c - (ANSWER)Whenever feasibly possible, when checking bearings on running pieces of equipment it is
wise to
a) check the oil quality leaving each
b) check the oil quantity leaving each
c) get accustomed to normal running temperature and
vibration by feel
d) smell the normal odors of the running bearing
e) observe the temperature on a thermometer
a - (ANSWER)One of the first ways to detect a fault in a reciprocating
,Power engineering Class 4 Part B Exam Questions With Complete Solutions
engine is
a) by sound
b) temperature indication
c) performance efficiency
d) by oil consumption
e) by smell
d - (ANSWER)A steam turbine's exhaust can often supply a process with
steam because
a) processes always require a lower steam pressure
b) processes never require the high steam temperatures
turbines do
c) turbine exhaust steam is always dry and saturated
d) it is free of oil
e) the steam will be at a temperature above the initial
temperature
c - (ANSWER)The exhaust steam from a steam turbine is more acceptable for process than the exhaust
from a steam engine because
a) it is much hotter
b) it is easily controlled
c) it is free of oil
d) it is free of moisture
e) it contains more condensate
d - (ANSWER)Turbines often have segmental carbon ring sealing glands
which are held in place by
a) labyrinths
,Power engineering Class 4 Part B Exam Questions With Complete Solutions
b) shrouding
c) drive screws
d) garter springs
e) thrust runners
d - (ANSWER)A steam turbine should trip or shut down when normal
operating speed is exceeded by
a) 250 RPM
b) 3 to 5%
c) 50 RPM
d) 10 to 15%
e) 25 RPM
b - (ANSWER)Condensing turbines
a) are always impulse turbines
b) will have a vacuum in the last row of rotating blades
c) will use the condensate for heating
d) are very small units
e) cannot have counter-flow stages
b - (ANSWER)Which turbine uses a condenser?
a) back pressure turbine
b) a turbine exhausting to a vacuum
c) a bleeder turbine exhausting at atmospheric pressure
d) a non-condensing extraction turbine
, Power engineering Class 4 Part B Exam Questions With Complete Solutions
e) a turbine exhausting to atmosphere
e - (ANSWER)The shrouding installed on the blading of a steam turbine serves to:
a) cool the blade tips
b) expand the steam
c) stop the steam flow
d) heat the steam
e) confine the steam to the blades
a - (ANSWER)The turbine over speed trip:
1. prevents the turbine from vibrating
2. prevents the turbine exceeding the maximum rated speed
3. is operated by a spring loaded pin in the rotating blades
4. will close the steam stop valve
5. should be tested before the turbine is placed in service
a) 2, 4, 5
b) 2, 3, 4, 5
c) 1, 2, 4
d) 3, 4, 5
e) 4, 5
b - (ANSWER)The over speed trip of a steam turbine
a) operates on turbine vibrations due to high speed
b - (ANSWER)A prime mover is
a) an electric motor
b) a steam turbine
c) a centrifugal pump
d) an air compressor
e) a boiler
c - (ANSWER)Large power production plants tend to be of the thermal type because they can burn solid
fuels and:
a) they are the least expensive to build
b) the noise level is much less than internal combustion
engines
c) the heat cycle they use is the most efficient
d) solid fuels are the most plentiful and cheapest
e) require the least amount of manpower
c - (ANSWER)Whenever feasibly possible, when checking bearings on running pieces of equipment it is
wise to
a) check the oil quality leaving each
b) check the oil quantity leaving each
c) get accustomed to normal running temperature and
vibration by feel
d) smell the normal odors of the running bearing
e) observe the temperature on a thermometer
a - (ANSWER)One of the first ways to detect a fault in a reciprocating
,Power engineering Class 4 Part B Exam Questions With Complete Solutions
engine is
a) by sound
b) temperature indication
c) performance efficiency
d) by oil consumption
e) by smell
d - (ANSWER)A steam turbine's exhaust can often supply a process with
steam because
a) processes always require a lower steam pressure
b) processes never require the high steam temperatures
turbines do
c) turbine exhaust steam is always dry and saturated
d) it is free of oil
e) the steam will be at a temperature above the initial
temperature
c - (ANSWER)The exhaust steam from a steam turbine is more acceptable for process than the exhaust
from a steam engine because
a) it is much hotter
b) it is easily controlled
c) it is free of oil
d) it is free of moisture
e) it contains more condensate
d - (ANSWER)Turbines often have segmental carbon ring sealing glands
which are held in place by
a) labyrinths
,Power engineering Class 4 Part B Exam Questions With Complete Solutions
b) shrouding
c) drive screws
d) garter springs
e) thrust runners
d - (ANSWER)A steam turbine should trip or shut down when normal
operating speed is exceeded by
a) 250 RPM
b) 3 to 5%
c) 50 RPM
d) 10 to 15%
e) 25 RPM
b - (ANSWER)Condensing turbines
a) are always impulse turbines
b) will have a vacuum in the last row of rotating blades
c) will use the condensate for heating
d) are very small units
e) cannot have counter-flow stages
b - (ANSWER)Which turbine uses a condenser?
a) back pressure turbine
b) a turbine exhausting to a vacuum
c) a bleeder turbine exhausting at atmospheric pressure
d) a non-condensing extraction turbine
, Power engineering Class 4 Part B Exam Questions With Complete Solutions
e) a turbine exhausting to atmosphere
e - (ANSWER)The shrouding installed on the blading of a steam turbine serves to:
a) cool the blade tips
b) expand the steam
c) stop the steam flow
d) heat the steam
e) confine the steam to the blades
a - (ANSWER)The turbine over speed trip:
1. prevents the turbine from vibrating
2. prevents the turbine exceeding the maximum rated speed
3. is operated by a spring loaded pin in the rotating blades
4. will close the steam stop valve
5. should be tested before the turbine is placed in service
a) 2, 4, 5
b) 2, 3, 4, 5
c) 1, 2, 4
d) 3, 4, 5
e) 4, 5
b - (ANSWER)The over speed trip of a steam turbine
a) operates on turbine vibrations due to high speed
