Boilermaker NCCER Test Question
and Answer (2026) A+ Verified
• A big control valve is pulled who is responsible for the rigging? -✓✓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? -✓✓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? -✓✓Choker Hitch
• When should rigging material be attached to a bean that is being demolished? -
✓✓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? -
✓✓Asbestos
• Which type of insulation is required before a vessel is entered? -✓✓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? -✓✓20 Ft
• What is the first thing a boilermaker should do before cutting into a tank or
vessel? -✓✓Determine the content
• What tool is normally used to check the alignment on the horizontal seams of
the shell plates? -✓✓A 2-foot level
• What is used to expand tubes inside mud and steam drums? -✓✓Rolling motors
and espanders
• What does a grooved nut on an Acetylene rig indicate? -✓✓The left hand thread
is for acetylene use only
, • Thermal beveling of pipe in preparation for welding requires use of an? -
✓✓Oxyfuel Torch
• A 1-inch plate is to be cut. Why should an acetylene gerulator on a cutting rig
not be adjusted over 15 PSI? -✓✓Acetylene is unstable above this pressure
• What action should be taken if a boiler tube fails? -✓✓Replace the failed tube
• Before a wall burner is pulled for inspection -✓✓The fuel gas valve must be shut
• Which of the following is a type of insulation used inside furnaces? -✓✓Fire
Brick
• What does "MTW" mean in reference to boiler tubing? -✓✓Minimum Wall
Thickness
• On a drawing, what is used to record any changes to the drawing? -✓✓Revision
Block
• Scales on a drawing are usually written in -✓✓inches and feet
• Dimensional measurements can be found on all of the following except -
✓✓Mechanical flow diagram
• All vessels elevations are taken from the -✓✓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? -✓✓Valve must be in closed position
• What is a spud wrench most commonly used for? -✓✓Aligning flanges
• What type of valves are typically used on a sight glass to direct flow? -✓✓3 way
valves
and Answer (2026) A+ Verified
• A big control valve is pulled who is responsible for the rigging? -✓✓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? -✓✓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? -✓✓Choker Hitch
• When should rigging material be attached to a bean that is being demolished? -
✓✓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? -
✓✓Asbestos
• Which type of insulation is required before a vessel is entered? -✓✓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? -✓✓20 Ft
• What is the first thing a boilermaker should do before cutting into a tank or
vessel? -✓✓Determine the content
• What tool is normally used to check the alignment on the horizontal seams of
the shell plates? -✓✓A 2-foot level
• What is used to expand tubes inside mud and steam drums? -✓✓Rolling motors
and espanders
• What does a grooved nut on an Acetylene rig indicate? -✓✓The left hand thread
is for acetylene use only
, • Thermal beveling of pipe in preparation for welding requires use of an? -
✓✓Oxyfuel Torch
• A 1-inch plate is to be cut. Why should an acetylene gerulator on a cutting rig
not be adjusted over 15 PSI? -✓✓Acetylene is unstable above this pressure
• What action should be taken if a boiler tube fails? -✓✓Replace the failed tube
• Before a wall burner is pulled for inspection -✓✓The fuel gas valve must be shut
• Which of the following is a type of insulation used inside furnaces? -✓✓Fire
Brick
• What does "MTW" mean in reference to boiler tubing? -✓✓Minimum Wall
Thickness
• On a drawing, what is used to record any changes to the drawing? -✓✓Revision
Block
• Scales on a drawing are usually written in -✓✓inches and feet
• Dimensional measurements can be found on all of the following except -
✓✓Mechanical flow diagram
• All vessels elevations are taken from the -✓✓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? -✓✓Valve must be in closed position
• What is a spud wrench most commonly used for? -✓✓Aligning flanges
• What type of valves are typically used on a sight glass to direct flow? -✓✓3 way
valves
