Power Engineering Class 4 Part B
Final Questions With All Correct
Answers| Passed And Verified |
Approved
The resistance of a liquid to internal deformation or shear is known as: -
Ans--Viscosity
If an oil must flow at a very low temperature, it must have the following
additive: - Ans--Pour point depressant
An anti-friction bearing: - Ans--Has rolling friction
The ability of an oil to lift and support heavy loads depends upon: - Ans--
Hydraulic pressure
Which type of oil produces higher fluid friction? - Ans--High viscosity oil
A shell type bearing: - Ans--Is used for heavy loads
A journal bearing: - Ans--Supports a shaft
If ambient air temperatures are very low, the preferred lubricant is a: - Ans--
Solid
A normal anti-friction bearing temperature operating range is: - Ans--65°C
to 70°C
Which of the following has the greatest effect on the viscosity of lubrication
oil? - Ans--Temperature
Where gear teeth inter-mesh, a lubricant must provide - Ans--Shock
absorption
,The lubricant for an anti-friction bearing: - Ans--Could be a semi-solid
lubricant
A rotary pump: - Ans--Should be equipped with a relief valve
When a pump discharges into a vessel operating at 300 kPa, the 300 kPa is
referred to as: - Ans--Pressure head
Sliding vane compressors: - Ans--Are positive displacement compressors
A pump is capable of suction lift due to: - Ans--Atmospheric pressure
The compressor that would favour volume over pressure would be the: -
Ans--Centrifugal
The name given to the category of pumps that use gear teeth, vanes, or
lobes to move the fluid being pumped is the _____ type. - Ans--Rotary
A diffuser pump: - Ans--Is more effective at changing velocity to pressure
than a volute pump
It is generally accurate to say that: _____________ results from every
metre of water depth or height - Ans--9.8 kPa pressure
The capacity of a centrifugal pump should only be reduced by: - Ans--
Throttling the discharge valve
Which of the following air compressors gives two compression strokes per
crankshaft revolution? - Ans--Single cylinder double acting compressor
Centrifugal pump power requirements are decreased when: - Ans--The
mass of fluid delivered is decreased
The difference between static suction head and static discharge head is: -
Ans--Total static head
A reciprocating air compressor works on the principle of: - Ans--Volume
reduction
,A low water fuel cutoff on an unattended steam boiler shall be installed so
that - Ans--It cannot be rendered inoperative
A low fire start switch: - Ans--Acts as a pre-ignition interlock to ensure
minimum damper setting during ignition
When differential pressure is used to measure water level in a boiler steam
drum, the differential pressure is: - Ans--Greatest when drum level is low
A high gas pressure fuel cut-off switch: - Ans--Prevents excessive fuel
pressure from creating an unstable flame condition
The discharge pipe from a boiler safety valve is supported independently of
the safety valve: - Ans--So the discharge pipe can expand without putting
force on the safety valve
The minimum DN size of the blowoff piping of a steam heating boiler is: -
Ans--20 mm
When an automatic unattended boiler starts up, the programming control
will first: - Ans--Start the forced draft fan
The prime importance of boiler fittings is: - Ans--Safety & efficiency
If a safety valve leaks after a try lever test, the operator should: - Ans--
Operate the try lever several times to blow away foreign material
Thermocouples are connected in series to: - Ans--Generate a higher
voltage
The safety valves on a boiler are set to open at 1380 kPa. The boiler MAWP
is 1380 kPa. How much higher can the boiler pressure rise above 1380 kPa,
if it is fired at full capacity with the steam outlet valve closed? - Ans--82.8
kPa
Transparent gauge glasses are lined with mica to: - Ans--Protect the glass
, If a steam boiler is in service and no water level shows in the gauge glass,
the first action would be to: - Ans--determine whether the gauge glass is
completely full or completely empty.
In a multiple boiler high pressure steam plant, when starting an entire
system from cold - Ans--The entire system warms and pressurizes as one
boiler warms, except for the boilers being left off line.
How often should the low water cut-off of a low pressure steam heating
boiler be blown off? - Ans--Daily
To confirm a hot water heating system is full, - Ans--the pressure shown on
the tridicator gauge must exceed the altitude indication.
When preparing to start a steam boiler with a fully modulating firing rate
control, set the manual-automatic switch to _________ and the flame
control switch to the __________ position. - Ans--manual, low-fire
When a combustion air opening is equipped with dampers, the dampers
must be - Ans--interlocked with the burner, and fully open before starting the
boiler.
On a boiler fuel system that has a "double block and bleed" arrangement: -
Ans--The "bleed" valve is a normally open solenoid valve.
If a cold boiler is warmed up slowly - Ans--it will develop less stress due to
uneven thermal expansion.
Which of the following is NOT a way to maintain a positive pressure on a
boiler during a wet layup? - Ans--use an oxygen scavenger.
The procedure for cutting a power boiler into a pressurized steam header is
described in - Ans--ASME Section VII.
What pressure is applied to a boiler during a hydrostatic test? - Ans--1.5
times the maximum allowable working pressure.
Final Questions With All Correct
Answers| Passed And Verified |
Approved
The resistance of a liquid to internal deformation or shear is known as: -
Ans--Viscosity
If an oil must flow at a very low temperature, it must have the following
additive: - Ans--Pour point depressant
An anti-friction bearing: - Ans--Has rolling friction
The ability of an oil to lift and support heavy loads depends upon: - Ans--
Hydraulic pressure
Which type of oil produces higher fluid friction? - Ans--High viscosity oil
A shell type bearing: - Ans--Is used for heavy loads
A journal bearing: - Ans--Supports a shaft
If ambient air temperatures are very low, the preferred lubricant is a: - Ans--
Solid
A normal anti-friction bearing temperature operating range is: - Ans--65°C
to 70°C
Which of the following has the greatest effect on the viscosity of lubrication
oil? - Ans--Temperature
Where gear teeth inter-mesh, a lubricant must provide - Ans--Shock
absorption
,The lubricant for an anti-friction bearing: - Ans--Could be a semi-solid
lubricant
A rotary pump: - Ans--Should be equipped with a relief valve
When a pump discharges into a vessel operating at 300 kPa, the 300 kPa is
referred to as: - Ans--Pressure head
Sliding vane compressors: - Ans--Are positive displacement compressors
A pump is capable of suction lift due to: - Ans--Atmospheric pressure
The compressor that would favour volume over pressure would be the: -
Ans--Centrifugal
The name given to the category of pumps that use gear teeth, vanes, or
lobes to move the fluid being pumped is the _____ type. - Ans--Rotary
A diffuser pump: - Ans--Is more effective at changing velocity to pressure
than a volute pump
It is generally accurate to say that: _____________ results from every
metre of water depth or height - Ans--9.8 kPa pressure
The capacity of a centrifugal pump should only be reduced by: - Ans--
Throttling the discharge valve
Which of the following air compressors gives two compression strokes per
crankshaft revolution? - Ans--Single cylinder double acting compressor
Centrifugal pump power requirements are decreased when: - Ans--The
mass of fluid delivered is decreased
The difference between static suction head and static discharge head is: -
Ans--Total static head
A reciprocating air compressor works on the principle of: - Ans--Volume
reduction
,A low water fuel cutoff on an unattended steam boiler shall be installed so
that - Ans--It cannot be rendered inoperative
A low fire start switch: - Ans--Acts as a pre-ignition interlock to ensure
minimum damper setting during ignition
When differential pressure is used to measure water level in a boiler steam
drum, the differential pressure is: - Ans--Greatest when drum level is low
A high gas pressure fuel cut-off switch: - Ans--Prevents excessive fuel
pressure from creating an unstable flame condition
The discharge pipe from a boiler safety valve is supported independently of
the safety valve: - Ans--So the discharge pipe can expand without putting
force on the safety valve
The minimum DN size of the blowoff piping of a steam heating boiler is: -
Ans--20 mm
When an automatic unattended boiler starts up, the programming control
will first: - Ans--Start the forced draft fan
The prime importance of boiler fittings is: - Ans--Safety & efficiency
If a safety valve leaks after a try lever test, the operator should: - Ans--
Operate the try lever several times to blow away foreign material
Thermocouples are connected in series to: - Ans--Generate a higher
voltage
The safety valves on a boiler are set to open at 1380 kPa. The boiler MAWP
is 1380 kPa. How much higher can the boiler pressure rise above 1380 kPa,
if it is fired at full capacity with the steam outlet valve closed? - Ans--82.8
kPa
Transparent gauge glasses are lined with mica to: - Ans--Protect the glass
, If a steam boiler is in service and no water level shows in the gauge glass,
the first action would be to: - Ans--determine whether the gauge glass is
completely full or completely empty.
In a multiple boiler high pressure steam plant, when starting an entire
system from cold - Ans--The entire system warms and pressurizes as one
boiler warms, except for the boilers being left off line.
How often should the low water cut-off of a low pressure steam heating
boiler be blown off? - Ans--Daily
To confirm a hot water heating system is full, - Ans--the pressure shown on
the tridicator gauge must exceed the altitude indication.
When preparing to start a steam boiler with a fully modulating firing rate
control, set the manual-automatic switch to _________ and the flame
control switch to the __________ position. - Ans--manual, low-fire
When a combustion air opening is equipped with dampers, the dampers
must be - Ans--interlocked with the burner, and fully open before starting the
boiler.
On a boiler fuel system that has a "double block and bleed" arrangement: -
Ans--The "bleed" valve is a normally open solenoid valve.
If a cold boiler is warmed up slowly - Ans--it will develop less stress due to
uneven thermal expansion.
Which of the following is NOT a way to maintain a positive pressure on a
boiler during a wet layup? - Ans--use an oxygen scavenger.
The procedure for cutting a power boiler into a pressurized steam header is
described in - Ans--ASME Section VII.
What pressure is applied to a boiler during a hydrostatic test? - Ans--1.5
times the maximum allowable working pressure.
