CLASS 5 BOILER TEST STUDY GUIDE
UPDATED ACTUAL Exam Questions and
CORRECT Answers
branch connections to piping systems "made in the field" and are of welded assembly being of
pipe to pipe require what considerations... - CORRECT ANSWER - is the angle of
insertion what the code allows
does the connection require reinforcement
did the engineer approve it
B31.1 - CORRECT ANSWER - Power Piping - High Pressure Steam - over 15 psi
B31.9 - CORRECT ANSWER - Building Services - Low Pressure Steam - under 15 psi
B31.5 - CORRECT ANSWER - Refrigeration Code
B31.3 - CORRECT ANSWER - Normal Fluid Systems - Catagory M - co-ax
sleeves/permit required
DCEN - CORRECT ANSWER - Direct Current Electrode Negative (TIG)
DCEP - CORRECT ANSWER - Direct Current Electrode Positive (Stick)
Formula for circumference - CORRECT ANSWER - pi x diameter
A friction lighter is a striker - CORRECT ANSWER - True
What type of fitting is installed at every right angle? - CORRECT ANSWER - Crosses
,The included angle of a center punch is: - CORRECT ANSWER - 60 degrees
example of "Place of Public Assembly" - CORRECT ANSWER - College campus
What is the minimum size pipe allowed on a control loop of a steam boiler? - CORRECT
ANSWER - 1"
Inspection of Catagory M piping is not required by a state inspector, if the authorized owner
representative performs the inspection... - CORRECT ANSWER - True
The Chief Inspector may enter all buildings at reasonable hours for inspections, except: -
CORRECT ANSWER - Private Residences
When there are two blow down valves they will be which type? - CORRECT ANSWER -
One quick opening and one slow opening
Which of the following is an example of vessels exempt from annual inspection? - CORRECT
ANSWER - vessels in storage - those of a federal agency - Hydronic in a private
residence
The place on an isometric drawing which shows the components being used is called: -
CORRECT ANSWER - Bill of Material
Brazing is covered under ASME section - CORRECT ANSWER - IX (nine)
When cutting pipe with heat number, transfer the number.... - CORRECT ANSWER -
BEFORE cutting
The letter "F", in A53F pipe stands for: - CORRECT ANSWER - Furnace Welded
,Repair permits are issued to the: - CORRECT ANSWER - Licensed contractor doing the
work
Adding a pipe branch by means of welding is allowed if... - CORRECT ANSWER - The
need for reinforcements has been calculated
Under B31.5, pipe larger than what size is covered? - CORRECT ANSWER - 2"
When welding stainless steel, what are the potentially dangerous oxides that are produced? -
CORRECT ANSWER - Nickel and Chromium
What extinguishing agent is used in Class A fires? - CORRECT ANSWER - Water
Medical sterilized smaller than ______cu. ft. are exempt? - CORRECT ANSWER - 1 1/2
cu. ft.
There is a $1,000 fine for anyone working, without a license, on pressure piping. - CORRECT
ANSWER - True
Pool boilers are exempt if...... - CORRECT ANSWER - the burner is wired in series with
the pump
What class of fire is burning magnesium? - CORRECT ANSWER - Class D
Refrigerant or a/c units containing _____ cu. ft. or less of non-corrosive gases are exempt. -
CORRECT ANSWER - 3
Pressure relief devices must be approved by what agency? - CORRECT ANSWER -
ASME (American Society of Mechanical Engineers)
, When hydro testing NBEP (Non-Boiler External Piping), it must be off from the boiler and
tested at how many times the operating pressure? - CORRECT ANSWER - 1 1/2
When securing wire rope, the clips are applied: - CORRECT ANSWER - Saddle on live
end
**A stop valve CANNOT be installed btwn the boiler and the relief valve.... - CORRECT
ANSWER - TRUE
When the weld symbol is on the top of the welding symbol (arrow), it means ... - CORRECT
ANSWER - Weld on the other sider
What type of stuffing box is used on high pressure/temp. valve? - CORRECT ANSWER -
Lantern type rigging
If you hold a Class IV or Class V license, you are allowed to supervise .... - CORRECT
ANSWER - class VI
Under B31.5, A1 and B1 refrigerant is classified by its toxicity and flammability. - CORRECT
ANSWER - True
How many automatic low-water fuel cutoff devices shall there be on each automatically fired
high-pressure steam boilers? - CORRECT ANSWER - Two
Which code section covers Power Piping? - CORRECT ANSWER - B31.1
How far apart are oxygen and acetylene bottles to be stored? - CORRECT ANSWER - 20
feet
UPDATED ACTUAL Exam Questions and
CORRECT Answers
branch connections to piping systems "made in the field" and are of welded assembly being of
pipe to pipe require what considerations... - CORRECT ANSWER - is the angle of
insertion what the code allows
does the connection require reinforcement
did the engineer approve it
B31.1 - CORRECT ANSWER - Power Piping - High Pressure Steam - over 15 psi
B31.9 - CORRECT ANSWER - Building Services - Low Pressure Steam - under 15 psi
B31.5 - CORRECT ANSWER - Refrigeration Code
B31.3 - CORRECT ANSWER - Normal Fluid Systems - Catagory M - co-ax
sleeves/permit required
DCEN - CORRECT ANSWER - Direct Current Electrode Negative (TIG)
DCEP - CORRECT ANSWER - Direct Current Electrode Positive (Stick)
Formula for circumference - CORRECT ANSWER - pi x diameter
A friction lighter is a striker - CORRECT ANSWER - True
What type of fitting is installed at every right angle? - CORRECT ANSWER - Crosses
,The included angle of a center punch is: - CORRECT ANSWER - 60 degrees
example of "Place of Public Assembly" - CORRECT ANSWER - College campus
What is the minimum size pipe allowed on a control loop of a steam boiler? - CORRECT
ANSWER - 1"
Inspection of Catagory M piping is not required by a state inspector, if the authorized owner
representative performs the inspection... - CORRECT ANSWER - True
The Chief Inspector may enter all buildings at reasonable hours for inspections, except: -
CORRECT ANSWER - Private Residences
When there are two blow down valves they will be which type? - CORRECT ANSWER -
One quick opening and one slow opening
Which of the following is an example of vessels exempt from annual inspection? - CORRECT
ANSWER - vessels in storage - those of a federal agency - Hydronic in a private
residence
The place on an isometric drawing which shows the components being used is called: -
CORRECT ANSWER - Bill of Material
Brazing is covered under ASME section - CORRECT ANSWER - IX (nine)
When cutting pipe with heat number, transfer the number.... - CORRECT ANSWER -
BEFORE cutting
The letter "F", in A53F pipe stands for: - CORRECT ANSWER - Furnace Welded
,Repair permits are issued to the: - CORRECT ANSWER - Licensed contractor doing the
work
Adding a pipe branch by means of welding is allowed if... - CORRECT ANSWER - The
need for reinforcements has been calculated
Under B31.5, pipe larger than what size is covered? - CORRECT ANSWER - 2"
When welding stainless steel, what are the potentially dangerous oxides that are produced? -
CORRECT ANSWER - Nickel and Chromium
What extinguishing agent is used in Class A fires? - CORRECT ANSWER - Water
Medical sterilized smaller than ______cu. ft. are exempt? - CORRECT ANSWER - 1 1/2
cu. ft.
There is a $1,000 fine for anyone working, without a license, on pressure piping. - CORRECT
ANSWER - True
Pool boilers are exempt if...... - CORRECT ANSWER - the burner is wired in series with
the pump
What class of fire is burning magnesium? - CORRECT ANSWER - Class D
Refrigerant or a/c units containing _____ cu. ft. or less of non-corrosive gases are exempt. -
CORRECT ANSWER - 3
Pressure relief devices must be approved by what agency? - CORRECT ANSWER -
ASME (American Society of Mechanical Engineers)
, When hydro testing NBEP (Non-Boiler External Piping), it must be off from the boiler and
tested at how many times the operating pressure? - CORRECT ANSWER - 1 1/2
When securing wire rope, the clips are applied: - CORRECT ANSWER - Saddle on live
end
**A stop valve CANNOT be installed btwn the boiler and the relief valve.... - CORRECT
ANSWER - TRUE
When the weld symbol is on the top of the welding symbol (arrow), it means ... - CORRECT
ANSWER - Weld on the other sider
What type of stuffing box is used on high pressure/temp. valve? - CORRECT ANSWER -
Lantern type rigging
If you hold a Class IV or Class V license, you are allowed to supervise .... - CORRECT
ANSWER - class VI
Under B31.5, A1 and B1 refrigerant is classified by its toxicity and flammability. - CORRECT
ANSWER - True
How many automatic low-water fuel cutoff devices shall there be on each automatically fired
high-pressure steam boilers? - CORRECT ANSWER - Two
Which code section covers Power Piping? - CORRECT ANSWER - B31.1
How far apart are oxygen and acetylene bottles to be stored? - CORRECT ANSWER - 20
feet
