NYC High Pressure Plant Tender Exam Questions and Answers Answers

NYC High Pressure Plant Tender Exam
Questions and Answers Answers
Question 1
How many gauge cocks are needed if a boiler is not over 36 inches in diameter and
does not exceed 100 sq feet of heating surface?
Correct Answer
2 HP Code: 14-9.18,b



Question 2
The lowest permissible water level in a miniature boiler is?
Correct Answer
" Shall be at a point 1/3 of the height of the shell". HP Code 14-11.8



Question 3
What shall a boiler with a MAWP (Maximum Allowable Working Pressure) up to 400
psi be tested?

Correct Answer
Once a year. HP Code: 14-9.7,a,I,



Question 4
Where do you install gas service or distribution line from a new high pressure tank?
Correct Answer
" All new high -pressure tank [ sic] installations she'll be located in ROOM
SEPARATED from gas service or distribution lines." RCNY: 20-01,c,2




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,Question 5
Hydronic system runs at 150 PSI, Hydrostatic test at 225 PSI, rated to run at 115 PSI
what pressure should it not exceed?
Correct Answer
150 PSIG.



Question 6
If an electric boiler is operating at a max of 1100 kW how many safety valves are
required?

Correct Answer
2 HP Code: 14-9.4



Question 7
When you roll and expand tubes how far should they extend?
Correct Answer
Evenly 1/4", 1/2", 3/4", HP Code: 14-9.2,e



Question 8
What is the Maximum size of a blow down valve? Minimum size and less than how
many sq feet.
Correct Answer
MAX 2 1/2", MIN 1" ( less than 100 sq ft min 3/4". HP Code: 14-9.27b,2



Question 9
How long do you hydrostatically test a hydronic system? At a pressure not less than?
Correct Answer
" Shall be tested hydrostatically at one and one half times the system design
operating pressure, but not less than 100 PSI. The duration of each test shall be not
less than 2 hours". NYC Mech: 1208.1




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,Question 10
Boilers shall have all controls set adjusted, and tested by
Correct Answer
Hot water and steam boilers shall have all operating and safety control set and
operationally tested by the INSTALLING CONTRACTOR. NYC Mech: 1004.7



Question 11
Brass pipes cannot be joined by
Correct Answer
Solder. NYC Mech: 1203.5 " Joints between brass pipe or fittings shall be Brazed,
mechanical, threaded or welded joints"



Question 12
You blow down the boiler every?
Correct Answer
" Bottom blowoff valves shall be tested DAILY when the boiler is in operation".



Question 13
When connecting two different types of metallic pipe what is used in between?
Correct Answer
A dielectric fitting. NYC Mech: 1203.1.2



Question 14
What is the max PSIG of a water column constructed of Cast Iron? Malleable Iron?
Correct Answer
Cast Iron = 250 PSIG Malleable Iron = 350 PSIG. HP Code: 14-9.36,b




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, Question 15
Mufflers are not to be installed on ---------?
Correct Answer
High temperature hot water boilers. HP Code: 14-9.11



Question 16
Street steam PSI and TEMP is then reduced by PRV to 90-16 pounds which is
Designed as a ------ PSIG system.
Correct Answer
" The system shall be designed for 125 PSIG". NYC Mech: 1210.2.1,2



Question 17
What is stamped on Boiler?
Correct Answer
Serial #, Name Manufacturer, Serial # of manufacturer, MAWP, Heating Surface, Year
Built, and Rated Steam Capacity. HP Code: 14-9,43,d, (1-6)



Question 18
What schedule pipe can you use on boiler blow down lines?
Correct Answer
Schedule 80



Question 19
What is the work done to a boiler that doesn't have to be reported and is exempt?
Correct Answer
Replacement of Backings to Man Holes and Hand Holes and Seal Welds to Tubes




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