NJ Black Seal Low Pressure Actual Exam | Complete Questions and Correct Answers | Updated Version

NJ Black Seal Low Pressure Actual Exam |
Complete Questions and Correct Answers |
Updated Version
Question 1
Which describes the combustion chamber of a serpentine tube heating boiler?
Correct Answer
located below the tubes



Question 2
What is used to control alkalinity?

Correct Answer
caustic soda



Question 3
On a low pressure boiler, after start-up, when do you close the vent valve?
Correct Answer
when steam comes out



Question 4
How often would you blow down a boiler with no chemical water analysis?
Correct Answer



Question 5
What is the best way to describe a thermocouple?
Correct Answer
two different metals welded together




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,Question 6
What is the purpose of an aquastat?
Correct Answer
controls water temperature



Question 7
Bottom blowdown is best performed when the boiler is _____.
Correct Answer
under light load



Question 8
The basic function of an automatic feedwater regulator on a boiler is to:
Correct Answer
maintain proper water level



Question 9
In NJ, how often should boilers over 100 horsepower be inspected internally &
externally?
Correct Answer
annually



Question 10
What is the best way to decide the blowdown frequency for a boiler?
Correct Answer
boiler water analysis



Question 11
A boiler operator log must be maintained in a boiler room containing over:
Correct Answer
100 horsepower




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,Question 12
When performing a hydrostatic test, the pressure on the boiler should not exceed:
Correct Answer
10 psi above 1.5 times the MAWP



Question 13
What is the purge cycle in a boiler meant to do?
Correct Answer
remove combustible gases



Question 14
If a one square inch column of water is one foot tall, how much does it weigh?
Correct Answer
.433 lbs



Question 15
What causes scale?
Correct Answer
calcium and magnesium



Question 16
Where is the flame sensing device located on a boiler?
Correct Answer
front



Question 17
Where are the combustible gases located in a water tube boiler?
Correct Answer
flowing around the tubes




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, Question 18
What is the maximum temperature a hot water boiler can be to qualify in New Jersey
as low pressure?
Correct Answer
250 degrees



Question 19
A safety valve on a low pressure hot water boiler will have a maximum setting of:
Correct Answer
160 psig



Question 20
How are cast iron sectional boilers put together?
Correct Answer
with push nipples and bolts



Question 21
What is the name of the device used to keep live steam from getting into a pressure
gauge?
Correct Answer
siphon loop



Question 22
What are you preventing by increasing the pressure within a cold boiler gradually?
Correct Answer
thermal shock




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