Minnesota Special Boiler License Practice
Exam Questions and Correct Answers
Question 1
Why is a pigtail or siphon required in steam pressure gauge lines?
Correct Answer
to protect the gauge from a high temperature.
Question 2
For the purpose of rating boiler horsepower for engineer license classifications only.
How many sq. ft. of heating surface shall be considered equivalent to one boiler
horsepower for conventional boiler?
Correct Answer
10 sq. ft.
Question 3
For licensing purposes, when the boiler heating surface cannot be discerned, the
boiler horsepower shall be determinated by dividing the BTU input by______?
Correct Answer
67,000
Question 4
What boiler license is required to be in charge of a boiler plant having 2 boiler each
having 2500 sq. ft., of heating surface?
Correct Answer
1st Class
Page 1 of 16
,Question 5
Can a low water low water condition i a hot water heating type boiler?
Correct Answer
Yes, for numerous reasons
Question 6
How does a pressuretrol attach to the steam space of boiler control the burner
operation?
Correct Answer
On pressure decrease - starts the burner.
Question 7
Heat can be transferred in three ways and they are:
Correct Answer
Conduction --Convection - Radiation
Question 8
The three basic types of low pressure boiler are:
Correct Answer
A fire tube, water tube and cast iron sectional.
Question 9
What controls the starting ans stopping of the burner by sending the temperature of
the water in a hot water boiler?
Correct Answer
Aqua Stat
Page 2 of 16
, Question 10
Before starting a steam or hot boiler, you should be check for?
Correct Answer
Water in the boiler.
Question 11
A high pressure boiler of 25 HO should be checked every?
Correct Answer
24 hrs.
Question 12
The purpose of a safety valve on a steam boiler is to:
Correct Answer
To prevent the boiler from exceeding its MAWP
Question 13
The bottom blow down line on a steam boiler system is located at the:
Correct Answer
Lowest Point on the waterside of a steam boiler.
Question 14
The dial on a pressure gauge used on a low pressure boiler should be graduated to:
Correct Answer
One and One half to Two times the maximum allowable working pressure.
Question 15
On steam or hot boiler, the safety valve or safety relieve valve could be tested by?
Correct Answer
By lifting the lever on the valve or raising the pressure until they operate.
Page 3 of 16
Exam Questions and Correct Answers
Question 1
Why is a pigtail or siphon required in steam pressure gauge lines?
Correct Answer
to protect the gauge from a high temperature.
Question 2
For the purpose of rating boiler horsepower for engineer license classifications only.
How many sq. ft. of heating surface shall be considered equivalent to one boiler
horsepower for conventional boiler?
Correct Answer
10 sq. ft.
Question 3
For licensing purposes, when the boiler heating surface cannot be discerned, the
boiler horsepower shall be determinated by dividing the BTU input by______?
Correct Answer
67,000
Question 4
What boiler license is required to be in charge of a boiler plant having 2 boiler each
having 2500 sq. ft., of heating surface?
Correct Answer
1st Class
Page 1 of 16
,Question 5
Can a low water low water condition i a hot water heating type boiler?
Correct Answer
Yes, for numerous reasons
Question 6
How does a pressuretrol attach to the steam space of boiler control the burner
operation?
Correct Answer
On pressure decrease - starts the burner.
Question 7
Heat can be transferred in three ways and they are:
Correct Answer
Conduction --Convection - Radiation
Question 8
The three basic types of low pressure boiler are:
Correct Answer
A fire tube, water tube and cast iron sectional.
Question 9
What controls the starting ans stopping of the burner by sending the temperature of
the water in a hot water boiler?
Correct Answer
Aqua Stat
Page 2 of 16
, Question 10
Before starting a steam or hot boiler, you should be check for?
Correct Answer
Water in the boiler.
Question 11
A high pressure boiler of 25 HO should be checked every?
Correct Answer
24 hrs.
Question 12
The purpose of a safety valve on a steam boiler is to:
Correct Answer
To prevent the boiler from exceeding its MAWP
Question 13
The bottom blow down line on a steam boiler system is located at the:
Correct Answer
Lowest Point on the waterside of a steam boiler.
Question 14
The dial on a pressure gauge used on a low pressure boiler should be graduated to:
Correct Answer
One and One half to Two times the maximum allowable working pressure.
Question 15
On steam or hot boiler, the safety valve or safety relieve valve could be tested by?
Correct Answer
By lifting the lever on the valve or raising the pressure until they operate.
Page 3 of 16
