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Power Engineering 4th Class Part B Comprehensive
EXAM QUESTIONS AND CORRECT ANSWERS
A reduction in sealing between the piston rings and the cylinder wall may be the result of:
Select one:
a.High carbon residue in the oil
b.High coolant temperature
c.Low cooling water temperature
d.High oil viscosity
High coolant temperature
Steam turbine governors:
Select one:
a.Are not required on reaction turbines
b.Should be checked annually by the boiler inspector
c.regulate the speed of the turbine automatically
d.prevent the turbine from over speeding
regulate the speed of the turbine automatically
A ball peen hammer is sometimes called a:
Select one:
a.Millwright's hammer
b.Mechanic's hammer
c.Machinist's hammer
d.Carpenter's hammer
Machinist's hammer
Which of the following is NOT done when preparing a steam boiler feedwater system?
Select one:
a.Confirm that the boiler water level is within range.
b.Verify that the boiler feedwater pumps are in service.
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c.Place the feedwater pre-treatment equipment in service.
d.Open the feedwater control bypass valve.
Open the feedwater control bypass valve.
The type of pump normally used with a hot oil system is a:
Select one:
a.Sliding vane pump
b.Rotary screw pump
c.Conventional, single stage centrifugal pump
d.Multistage reciprocating pump
Conventional, single stage centrifugal pump
Activated carbon will absorb odours and objectionable gases by up to _____ of its own weight
before requiring replacement.
Select one:
a.0.3
b.0.5
c.0.1
d.0.2
0.2
A tube beading tool is used:
Select one:
a.On water tube boilers
b.On fire tube boilers
c.To fasten the stays in the tube sheet
d.To unfasten fire tubes from the tube sheet.
On fire tube boilers
Every steam boiler must have a safety valve that is:
Select one:
a.Connected to the steam or water space of the boiler, without any intervening fitting.
b.Fitted in a vertical position, directly connected to the top of the boiler.
c.Fitted securely to a shut-off valve, which is directly connected to the top of the boiler.
d.Placed in the piping system leading from the steam stop valve.
Fitted in a vertical position, directly connected to the top of the boiler.
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One purpose of the small valve on top of the shell of most boilers, which is not required by
code, is to:
Select one:
a.allow air into the boiler when the boiler is being filled with water.
b.allow air to escape from the boiler when the boiler is being filled with water.
c.allow water to escape before the steam stop valve is opened during the warm-up period.
d.allow water into the boiler when the boiler is being drained or cooled preventing the
formation of a vacuum.
allow air to escape from the boiler when the boiler is being filled with water.
Which of the following is NOT a common type of refrigeration condenser?
Select one:
a.Shell and tube
b.Shell and coil
c.Flooded
d.Air-cooled
Flooded
With respect to steam trap installations, which of the following statements is FALSE?
Select one:
a.Drip the steam supply main through a steam trap into the return condensate main, and not
through the steam coil.
b.Trap each steamcoil separately.
c.Locate the steam trap so that its outlet is at least 30 cm above the coil condensate outlet.
d.Choose a steam trap based on the pressure difference across the trap, and a minimum
capacity corresponding to three times the coil condensate rate.
Locate the steam trap so that its outlet is at least 30 cm above the coil condensate outlet.
How does one type of amine protect a condensate system?
Select one:
a.By scavenging oxygen from the condensate
b.By forming a protective film coating on scale forming solids
c.By neutralizing hydroxide alkalinity
d.By neutralizing carbonic acid
By neutralizing carbonic acid
A shell type bearing:
Select one:
Power Engineering 4th Class Part B Comprehensive
EXAM QUESTIONS AND CORRECT ANSWERS
A reduction in sealing between the piston rings and the cylinder wall may be the result of:
Select one:
a.High carbon residue in the oil
b.High coolant temperature
c.Low cooling water temperature
d.High oil viscosity
High coolant temperature
Steam turbine governors:
Select one:
a.Are not required on reaction turbines
b.Should be checked annually by the boiler inspector
c.regulate the speed of the turbine automatically
d.prevent the turbine from over speeding
regulate the speed of the turbine automatically
A ball peen hammer is sometimes called a:
Select one:
a.Millwright's hammer
b.Mechanic's hammer
c.Machinist's hammer
d.Carpenter's hammer
Machinist's hammer
Which of the following is NOT done when preparing a steam boiler feedwater system?
Select one:
a.Confirm that the boiler water level is within range.
b.Verify that the boiler feedwater pumps are in service.
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c.Place the feedwater pre-treatment equipment in service.
d.Open the feedwater control bypass valve.
Open the feedwater control bypass valve.
The type of pump normally used with a hot oil system is a:
Select one:
a.Sliding vane pump
b.Rotary screw pump
c.Conventional, single stage centrifugal pump
d.Multistage reciprocating pump
Conventional, single stage centrifugal pump
Activated carbon will absorb odours and objectionable gases by up to _____ of its own weight
before requiring replacement.
Select one:
a.0.3
b.0.5
c.0.1
d.0.2
0.2
A tube beading tool is used:
Select one:
a.On water tube boilers
b.On fire tube boilers
c.To fasten the stays in the tube sheet
d.To unfasten fire tubes from the tube sheet.
On fire tube boilers
Every steam boiler must have a safety valve that is:
Select one:
a.Connected to the steam or water space of the boiler, without any intervening fitting.
b.Fitted in a vertical position, directly connected to the top of the boiler.
c.Fitted securely to a shut-off valve, which is directly connected to the top of the boiler.
d.Placed in the piping system leading from the steam stop valve.
Fitted in a vertical position, directly connected to the top of the boiler.
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One purpose of the small valve on top of the shell of most boilers, which is not required by
code, is to:
Select one:
a.allow air into the boiler when the boiler is being filled with water.
b.allow air to escape from the boiler when the boiler is being filled with water.
c.allow water to escape before the steam stop valve is opened during the warm-up period.
d.allow water into the boiler when the boiler is being drained or cooled preventing the
formation of a vacuum.
allow air to escape from the boiler when the boiler is being filled with water.
Which of the following is NOT a common type of refrigeration condenser?
Select one:
a.Shell and tube
b.Shell and coil
c.Flooded
d.Air-cooled
Flooded
With respect to steam trap installations, which of the following statements is FALSE?
Select one:
a.Drip the steam supply main through a steam trap into the return condensate main, and not
through the steam coil.
b.Trap each steamcoil separately.
c.Locate the steam trap so that its outlet is at least 30 cm above the coil condensate outlet.
d.Choose a steam trap based on the pressure difference across the trap, and a minimum
capacity corresponding to three times the coil condensate rate.
Locate the steam trap so that its outlet is at least 30 cm above the coil condensate outlet.
How does one type of amine protect a condensate system?
Select one:
a.By scavenging oxygen from the condensate
b.By forming a protective film coating on scale forming solids
c.By neutralizing hydroxide alkalinity
d.By neutralizing carbonic acid
By neutralizing carbonic acid
A shell type bearing:
Select one:
