NYC High Pressure Boiler Safety Questions with
Correct Answers
The minimum blowdown for a spring loaded safety valve shall be of what percent of the set pressure? -
Answer - 10%
How many safety valves does a boiler have with 500 sq. ft. of heating surface? - Answer - 2 safety
valves
With what safety fitting shall you protect high pressure steam and water boilers with? - Answer - Dual
low water cut outs
Spring loaded safety valves have a total combined relief capacity of? - Answer - 100% of the max
designed capacity of the boiler.
What is the total combined relieving capacity of power actuated relieving valves? - Answer - No less
than 10% of the MAWP or no higher than 20% above the MAWP
What is the minimum blowdown for a spring loaded safety valve? - Answer - 2%
Safety valve capacity may be checked in what 3 ways? - Answer - Accumulation test, amount of fuel
burned, evaporative capacity of feed water
Safety valve popping tolerance + capacity up to 70 psig? 71-300 psig, 301-1000 psig, >1000 - Answer -
70 = 2 psig, 71-300 = 3%, 301-1000 = 10 psig, >1000 = 1%
What is the minimum safety or relief capacity for electric boilers? - Answer - 3 1/2 lb/hr/kw
If there is one safety valve on an electric boiler, what is the max output? - Answer - Less than 1,100kW
If an electric boiler is operating at a max of 1,100kW, how many safety valves are required? - Answer -
2 safety valves
How many safety valves are on a miniature boiler? - Answer - 1 since only 20 sq ft
Electric boilers have two or more safety valves at a power output of _______ kW. - Answer - 1,100kW
Correct Answers
The minimum blowdown for a spring loaded safety valve shall be of what percent of the set pressure? -
Answer - 10%
How many safety valves does a boiler have with 500 sq. ft. of heating surface? - Answer - 2 safety
valves
With what safety fitting shall you protect high pressure steam and water boilers with? - Answer - Dual
low water cut outs
Spring loaded safety valves have a total combined relief capacity of? - Answer - 100% of the max
designed capacity of the boiler.
What is the total combined relieving capacity of power actuated relieving valves? - Answer - No less
than 10% of the MAWP or no higher than 20% above the MAWP
What is the minimum blowdown for a spring loaded safety valve? - Answer - 2%
Safety valve capacity may be checked in what 3 ways? - Answer - Accumulation test, amount of fuel
burned, evaporative capacity of feed water
Safety valve popping tolerance + capacity up to 70 psig? 71-300 psig, 301-1000 psig, >1000 - Answer -
70 = 2 psig, 71-300 = 3%, 301-1000 = 10 psig, >1000 = 1%
What is the minimum safety or relief capacity for electric boilers? - Answer - 3 1/2 lb/hr/kw
If there is one safety valve on an electric boiler, what is the max output? - Answer - Less than 1,100kW
If an electric boiler is operating at a max of 1,100kW, how many safety valves are required? - Answer -
2 safety valves
How many safety valves are on a miniature boiler? - Answer - 1 since only 20 sq ft
Electric boilers have two or more safety valves at a power output of _______ kW. - Answer - 1,100kW
