Power Engineering - 4B3 Practice Questions With Complete
Solutions
It is necessary to clearly mark or identify valves and fittings so
that:
a. The operator knows how it works
b. A proper safety inventory can be maintained
c. Strength and material can be applied for a particular use
d. The manufacturers reputation is known
e. They can be properly stored in the warehouse
c. Strength and material can be applied for a particular use
What does the boiler inspector install to prevent tampering with
a safety valve setting?
a. Restraining order
b. Cover plate
c. Seal
d. Gag
e. Plug
c. Seal
Low pressure safety valves are ------ and ------- than the high
pressure safety valves.
shorter and wider
The lip on a safety valve:
,a. Supplies a drain lip for condensate to collect on
b. Allows it to close slowly
c. Allows it to pop open
d. Makes the valve stronger
e. Is only required if the steam is superheated
c. Allows it to pop open
A fitting which is not clearly identified should be:
a. Rejected completely
b. Used only for low pressure service
c. Used as a spare part
d. Installed with a warning tag attached
e. Installed by the Chief Engineer
a. Rejected completely
Per ASME code, the safety relief valve setting for industrial
potable water heater shall be 6% more than its maximum
allowable working
pressure.
a. True
b. False
b. False
A safety valve is a pressure relief valve.
a. True
b. False
a. True
,A device which is directly attached to a boiler is called a
----------.
fitting
Per ASME code, all safety valves and safety relief valves
require blowdown adjustment rings.
a. True
b. False
b. False
The force of the steam pressure acting on the safety valve disc is
a function of the:
a. Blowdown ring diameter
b. Huddling chamber volume
c. Seat diameter
d. % valve opening
e. Disc area
e. Disc area
A blowdown ring on a safety valve is used to:
a. Set the opening pressure
b. Adjust the operating pressure of the valve
c. Adjust the blowdown differential
d. Increase the effectiveness of the safety valve
e. Increase the life of the cone shaped lip
c. Adjust the blowdown differential
, When performing a safety valve pop test, one of the first things
to do is:
a. Notify the boiler inspector
b. Notify the chief engineer
c. Verify the accuracy of the applicable steam pressure gauge
d. Open the main stop valve
e. Check the blowdown of the safety valve
c. Verify the accuracy of the applicable steam pressure gauge
A safety relief valve is like a safety valve except it:
a. Does not have a blowdown ring or bottom guides
b. Is prone to leakage
c. Must have greater blowdown
d. Must discharge directly to atmosphere
e. May have an isolation valve placed between it and the
pressure vessel
a. Does not have a blowdown ring or bottom guides
The safety valve test lever must not be used unless:
a. The boiler is at the maximum pressure
b. There is no load on the boiler
c. The boiler is in operation
d. The boiler inspector requests it
e. The pressure is at least 75% of the valve popping pressure
e. The pressure is at least 75% of the valve popping pressure
Solutions
It is necessary to clearly mark or identify valves and fittings so
that:
a. The operator knows how it works
b. A proper safety inventory can be maintained
c. Strength and material can be applied for a particular use
d. The manufacturers reputation is known
e. They can be properly stored in the warehouse
c. Strength and material can be applied for a particular use
What does the boiler inspector install to prevent tampering with
a safety valve setting?
a. Restraining order
b. Cover plate
c. Seal
d. Gag
e. Plug
c. Seal
Low pressure safety valves are ------ and ------- than the high
pressure safety valves.
shorter and wider
The lip on a safety valve:
,a. Supplies a drain lip for condensate to collect on
b. Allows it to close slowly
c. Allows it to pop open
d. Makes the valve stronger
e. Is only required if the steam is superheated
c. Allows it to pop open
A fitting which is not clearly identified should be:
a. Rejected completely
b. Used only for low pressure service
c. Used as a spare part
d. Installed with a warning tag attached
e. Installed by the Chief Engineer
a. Rejected completely
Per ASME code, the safety relief valve setting for industrial
potable water heater shall be 6% more than its maximum
allowable working
pressure.
a. True
b. False
b. False
A safety valve is a pressure relief valve.
a. True
b. False
a. True
,A device which is directly attached to a boiler is called a
----------.
fitting
Per ASME code, all safety valves and safety relief valves
require blowdown adjustment rings.
a. True
b. False
b. False
The force of the steam pressure acting on the safety valve disc is
a function of the:
a. Blowdown ring diameter
b. Huddling chamber volume
c. Seat diameter
d. % valve opening
e. Disc area
e. Disc area
A blowdown ring on a safety valve is used to:
a. Set the opening pressure
b. Adjust the operating pressure of the valve
c. Adjust the blowdown differential
d. Increase the effectiveness of the safety valve
e. Increase the life of the cone shaped lip
c. Adjust the blowdown differential
, When performing a safety valve pop test, one of the first things
to do is:
a. Notify the boiler inspector
b. Notify the chief engineer
c. Verify the accuracy of the applicable steam pressure gauge
d. Open the main stop valve
e. Check the blowdown of the safety valve
c. Verify the accuracy of the applicable steam pressure gauge
A safety relief valve is like a safety valve except it:
a. Does not have a blowdown ring or bottom guides
b. Is prone to leakage
c. Must have greater blowdown
d. Must discharge directly to atmosphere
e. May have an isolation valve placed between it and the
pressure vessel
a. Does not have a blowdown ring or bottom guides
The safety valve test lever must not be used unless:
a. The boiler is at the maximum pressure
b. There is no load on the boiler
c. The boiler is in operation
d. The boiler inspector requests it
e. The pressure is at least 75% of the valve popping pressure
e. The pressure is at least 75% of the valve popping pressure
