BOILERMAKER NCCR TEST QUESTIONS AND
ANSWERS 2025-2026
When are steel chain slings recommended? - CORRECT ANSWER-When rigging from
three points
A big control valve is pulled who is responsible for the rigging? - CORRECT ANSWER-
Crane operator and rigger
What should be used to hold the pipe when setting up two 40-foot joints of 16-inch STD
WT pipe? - CORRECT ANSWER-4 legged roller top jacks
The hitch made by wrapping the sling around the load, then passing one eye of the sling
throughout a shackle is called? - CORRECT ANSWER-Choker Hitch
When should rigging material be attached to a bean that is being demolished? -
CORRECT ANSWER-Before any bolts are removed or any cutting is done on the beam.
Which of the following has a greater possibility of being a respiratory hazard? -
CORRECT ANSWER-Asbestos
Which type of insulation is required before a vessel is entered? - CORRECT ANSWER-
Locking, Tagging, and Blinding lines that feed the vessel
According to OSHA, oxygen and acetylene cylinders in storage must be separated at
what minimum distance? - CORRECT ANSWER-20 Ft
What is the first thing a boilermaker should do before cutting into a tank or vessel? -
CORRECT ANSWER-Determine the content
What tool is normally used to check the alignment on the horizontal seams of the shell
plates? - CORRECT ANSWER-A 2-foot level
What is used to expand tubes inside mud and steam drums? - CORRECT ANSWER-
Rolling motors and expanders
What does a grooved nut on an Acetylene rig indicate? - CORRECT ANSWER-The left
hand thread is for acetylene use only
, Thermal beveling of pipe in preparation for welding requires use of an? - CORRECT
ANSWER-Ox Fuel Torch
A 1-inch plate is to be cut. Why should an acetylene regulator on a cutting rig not be
adjusted over 15 PSI? - CORRECT ANSWER-Acetylene is unstable above this
pressure
What action should be taken if a boiler tube fails? - CORRECT ANSWER-Replace the
failed tube
Before a wall burner is pulled for inspection - CORRECT ANSWER-The fuel gas valve
must be shut
Which of the following is a type of insulation used inside furnaces? - CORRECT
ANSWER-Fire Brick
What does "MTW" mean in reference to boiler tubing? - CORRECT ANSWER-Minimum
Wall Thickness
On a drawing, what is used to record any changes to the drawing? - CORRECT
ANSWER-Revision Block
Scales on a drawing are usually written in - CORRECT ANSWER-inches and feet
Dimensional measurements can be found on all of the following except - CORRECT
ANSWER-Mechanical flow diagram
All vessels elevations are taken from the - CORRECT ANSWER-top of steel on the
embed ring (base plate)
A gate valve is being removed from a product line. All of the following procedures must
be performed except? - CORRECT ANSWER-Valve must be in closed position
What is a spud wrench most commonly used for? - CORRECT ANSWER-Aligning
flanges
What type of valves are typically used on a sight glass to direct flow? - CORRECT
ANSWER-3 way valves
Handhold cap and plug material is verified by the - CORRECT ANSWER-P4 report
ANSWERS 2025-2026
When are steel chain slings recommended? - CORRECT ANSWER-When rigging from
three points
A big control valve is pulled who is responsible for the rigging? - CORRECT ANSWER-
Crane operator and rigger
What should be used to hold the pipe when setting up two 40-foot joints of 16-inch STD
WT pipe? - CORRECT ANSWER-4 legged roller top jacks
The hitch made by wrapping the sling around the load, then passing one eye of the sling
throughout a shackle is called? - CORRECT ANSWER-Choker Hitch
When should rigging material be attached to a bean that is being demolished? -
CORRECT ANSWER-Before any bolts are removed or any cutting is done on the beam.
Which of the following has a greater possibility of being a respiratory hazard? -
CORRECT ANSWER-Asbestos
Which type of insulation is required before a vessel is entered? - CORRECT ANSWER-
Locking, Tagging, and Blinding lines that feed the vessel
According to OSHA, oxygen and acetylene cylinders in storage must be separated at
what minimum distance? - CORRECT ANSWER-20 Ft
What is the first thing a boilermaker should do before cutting into a tank or vessel? -
CORRECT ANSWER-Determine the content
What tool is normally used to check the alignment on the horizontal seams of the shell
plates? - CORRECT ANSWER-A 2-foot level
What is used to expand tubes inside mud and steam drums? - CORRECT ANSWER-
Rolling motors and expanders
What does a grooved nut on an Acetylene rig indicate? - CORRECT ANSWER-The left
hand thread is for acetylene use only
, Thermal beveling of pipe in preparation for welding requires use of an? - CORRECT
ANSWER-Ox Fuel Torch
A 1-inch plate is to be cut. Why should an acetylene regulator on a cutting rig not be
adjusted over 15 PSI? - CORRECT ANSWER-Acetylene is unstable above this
pressure
What action should be taken if a boiler tube fails? - CORRECT ANSWER-Replace the
failed tube
Before a wall burner is pulled for inspection - CORRECT ANSWER-The fuel gas valve
must be shut
Which of the following is a type of insulation used inside furnaces? - CORRECT
ANSWER-Fire Brick
What does "MTW" mean in reference to boiler tubing? - CORRECT ANSWER-Minimum
Wall Thickness
On a drawing, what is used to record any changes to the drawing? - CORRECT
ANSWER-Revision Block
Scales on a drawing are usually written in - CORRECT ANSWER-inches and feet
Dimensional measurements can be found on all of the following except - CORRECT
ANSWER-Mechanical flow diagram
All vessels elevations are taken from the - CORRECT ANSWER-top of steel on the
embed ring (base plate)
A gate valve is being removed from a product line. All of the following procedures must
be performed except? - CORRECT ANSWER-Valve must be in closed position
What is a spud wrench most commonly used for? - CORRECT ANSWER-Aligning
flanges
What type of valves are typically used on a sight glass to direct flow? - CORRECT
ANSWER-3 way valves
Handhold cap and plug material is verified by the - CORRECT ANSWER-P4 report
