High Pressure Steam Exam Questions And Answers

HIGH PRESSURE STEAM EXAM QUESTIONS
AND ANSWERS
Question 1
What is the minimum size for a safety valve?
Correct Answer
3/4". LP Code: 4-5.2,e. HP Code: 14-11.10 miniature (" Each miniature boiler shall be
equipped with a sealed spring-loader pop safety valve not less than one-half inch in
diameter")



Question 2
Where no mechanical feed is attached to a boiler what is the safety valve set
pressure?
Correct Answer
6% HP Code: 14-9.9,e



Question 3
How would you prevent damage to piping due to temperature changes?
Correct Answer
Expansion Bends. NYC Mech: 1202.7



Question 4
What is the minimum size of the blow off piping?
Correct Answer
3/4"




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,Question 5
What kind of scrubber does an incinerator have?
Correct Answer
Wet Scrubber (slurry)



Question 6
When shall a boiler have at least two means of feed water
Correct Answer
" boiler having MORE THAN 500 SQUARE FEET of water-heating surface shall have
at least two means of feeding water". HP Code" 14 -9.34,a



Question 7
18 What items are exempt from the reporting requirements?
Correct Answer
Exemptions: (1) the installation of backing rings in handhole or manhole openings
or the building up of same; and (2) the seal welding of tubes to the tube sheet. HP
Code: 14-3.4, b, 1-2



Question 8
The flash point in a Hydronic system is -- F* above the maximum operating
temperature
Correct Answer
50* F



Question 9
What can be connected to the float chamber or water column?
Correct Answer
A Damper Regulator, a Feed water Regulator, a Gauge, a Drain. HP Code: 14-9.36,5




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,Question 10
What standard is plastic pipe/pvc in Hydronic systems held to?
Correct Answer
ASTM. NYC Mech: 1202.4



Question 11
17 What shall be placed in between different joints and piping material?
Correct Answer
An approved Adapter Fitting NYC Mech: 1203.1.2



Question 12
Where is a remote disconnect located? What is it labeled?
Correct Answer
Remote control for burner, located at the egress. NYC Mech: 1006.8.1



Question 13
If a boiler is gravity fed, there shall be what valves on the line?
Correct Answer
A stop valve as close as the boiler as possible followed by a Check Valve.



Question 14
Muffler shall
Correct Answer
Have sufficient outlet area to prevent back pressure HP Code: 14-9.11,a




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, Question 15
Forced steam flow generator safety valve relieve --------- of the MAWP, they pop at
no less than ----% of the MAWP and no higher than -----% MAWP and shall have ----
---- "fail safe" to stop the flow of ------ and ---------- to the boiler, these valves then
reseat at no less than -------%
Correct Answer
Relieve 100% of the MAWP pop no LESS than 10% and no HIGHER than 20%, with 2
FAIL SAFES stopping the flow of fuel and feed water to the boiler, reseat NO LESS
THAN 10%. Code: 14-9.5



Question 16
When a safety valve is replaced what is different?
Correct Answer
Shall be equal to the last valve installed. HP Code: 14-1.5,b / 14-9.7,2,b



Question 17
35 Waste Gas removal of a boiler shall conduct the products of combustion where?
Correct Answer
To the atmosphere. HP Code: 14-6.1



Question 18
Where does a low pressure safety and relief discharge to?
Correct Answer
The drain. LP Code: 4-5.4,i



Question 19
13 What shall a Design plan of a boiler and application contain but not limited to?
Correct Answer
Size + Location, Operating Pressure + Temperature of the Pressure vessel, and Type
+ Specification of Pressure Relief.




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