Power Engineering 5th Class Boiler Practice QNS and Answers
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Course
Power Engineering
Institution
Power Engineering
Power Engineering 5th Class Boiler Practice QNS and Answers
An agency or code with which fittings must comply is:
Choose one answer.
a. Health and Safety Code
b. Fittings and Boiler Parts Act
c. Boiler Repair Code
d. Plumbing Gas Act
e. ASME Code - ANS e
Hot water heating boil...
Power Engineering 5th Class Boiler
Practice QNS and Answers
An agency or code with which fittings must comply is:
Choose one answer.
a. Health and Safety Code
b. Fittings and Boiler Parts Act
c. Boiler Repair Code
A
d. Plumbing Gas Act
e. ASME Code - ANS e
VI
Hot water heating boilers have stop valves in their supply and return piping:
Choose one answer.
TU
a. To allow for better warm ups
b. To prevent water from entering another in-service unit
c. So that each boiler can have separate water treatment
d. So that the boiler can be drained without draining the system
IS
e. To permit annual maintenance - ANS d
An expansion tank is used to:
OM
Choose one answer.
a. Dampen pulsations in the water pressure
b. Increase water temperature
c. Allow for the expansion of the water
d. Provide more efficient water circulation
NA
e. Allow free expansion of the steam - ANS c
How many pressure relief valves shall a hot water heating boiler have?
Choose one answer.
JP
a. None
b. At least one
c. At least two
d. At least three
e. At least four - ANS b
The scale on the dial of the pressure or altitude gauge on a hot water heating boiler
shall be graduated to not more than _____ times the pressure at which the safety relief
valve is set.
, Choose one answer.
a. 1.5
b. 2
c. 2.5
d. 3
e. 3.5 - ANS e
Boiler stop valves shall be:
Choose one answer.
a. Always of the outside screw and yoke design
A
b. Globe valves
c. Identified with durable tags
VI
d. Installed on horizontal piping only
e. Throttled during operation - ANS c
TU
The scale on the dial of the pressure or altitude gauge on a hot water heating boiler
shall be graduated approximately to not less than _____ times the maximum allowable
working pressure.
Choose one answer.
IS
a. 0.5
b. 1
c. 1.5
OM
d. 2
e. 2.5 - ANS c
If a hot-water heating boiler has an automatic fill valve, and is requiring a lot of makeup
water, this may indicate:
NA
Choose one answer.
a. The expansion tank is empty.
b. There is probably a leak in the system
c. There has been a drastic change in the water quality
d. The return pumps are not working
JP
e. The flow meter is not working properly - ANS b
The pressure relief valve on a hot water boiler:
Choose one answer.
a. Should be installed on the boiler or close to it
b. Can be installed anywhere in the system
c. Must be at least 51 mm pipe size
d. Does not require annual checking or testing
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