Page 1 of 36
BOILERMAKER NCCER EXAM ACTUAL EXAM 2026-2027
COMPLETE QUESTIONS AND VERIFIED SOLUTIONS
LATEST UPDATE THIS YEAR
QUESTION: What is the first thing a boilermaker should do before cutting into a tank or vessel?
- ANSWER-Determine the content
QUESTION: What tool is normally used to check the alignment on the horizontal seams of the
shell plates? - ANSWER-A 2-foot level
QUESTION: What is used to expand tubes inside mud and steam drums? - ANSWER-Rolling
motors and espanders
QUESTION: What does a grooved nut on an Acetylene rig indicate? - ANSWER-The left hand
thread is for acetylene use only
,Page 2 of 36
QUESTION: Thermal beveling of pipe in preparation for welding requires use of an? - ANSWER-
Oxyfuel Torch
QUESTION: A 1-inch plate is to be cut. Why should an acetylene gerulator on a cutting rig not be
adjusted over 15 PSI? - ANSWER-Acetylene is unstable above this pressure
QUESTION: What action should be taken if a boiler tube fails? - ANSWER-Replace the failed
tube
QUESTION: Before a wall burner is pulled for inspection - ANSWER-The fuel gas valve must be
shut
QUESTION: Which of the following is a type of insulation used inside furnaces? - ANSWER-Fire
Brick
QUESTION: What does "MTW" mean in reference to boiler tubing? - ANSWER-Minimum Wall
Thickness
,Page 3 of 36
QUESTION: On a drawing, what is used to record any changes to the drawing? - ANSWER-
Revision Block
QUESTION: Scales on a drawing are usually written in - ANSWER-inches and feet
QUESTION: Dimensional measurements can be found on all of the following except - ANSWER-
Mechanical flow diagram
QUESTION: All vessels elevations are taken from the - ANSWER-top of steel on the embed ring
(base plate)
QUESTION: A gate valve is being removed from a product line. All of the following procedures
must be performed except? - ANSWER-Valve must be in closed position
QUESTION: What is a spud wrench most commonly used for? - ANSWER-Aligning flanges
, Page 4 of 36
QUESTION: What type of valves are typically used on a sight glass to direct flow? - ANSWER-3
way valves
Q; When are steel chain slings recommended? - ANSWER-When rigging from three points
QUESTION: A big control valve is pulled who is responsible for the rigging? - ANSWER-Crane
operator and rigger
QUESTION: What should be used to hold the pipe when setting up two 40-foot joints of 16-inch
STD WT pipe? - ANSWER-4 legged roller top jacks
QUESTION: The hitch made by wrapping the sling around the load, then passing one eye of the
sling throughout a shackle is called? - ANSWER-Choker Hitch
QUESTION: When should rigging material be attached to a bean that is being demolished? -
ANSWER-Before any bolts are removed or any cutting is done on the beam.
BOILERMAKER NCCER EXAM ACTUAL EXAM 2026-2027
COMPLETE QUESTIONS AND VERIFIED SOLUTIONS
LATEST UPDATE THIS YEAR
QUESTION: What is the first thing a boilermaker should do before cutting into a tank or vessel?
- ANSWER-Determine the content
QUESTION: What tool is normally used to check the alignment on the horizontal seams of the
shell plates? - ANSWER-A 2-foot level
QUESTION: What is used to expand tubes inside mud and steam drums? - ANSWER-Rolling
motors and espanders
QUESTION: What does a grooved nut on an Acetylene rig indicate? - ANSWER-The left hand
thread is for acetylene use only
,Page 2 of 36
QUESTION: Thermal beveling of pipe in preparation for welding requires use of an? - ANSWER-
Oxyfuel Torch
QUESTION: A 1-inch plate is to be cut. Why should an acetylene gerulator on a cutting rig not be
adjusted over 15 PSI? - ANSWER-Acetylene is unstable above this pressure
QUESTION: What action should be taken if a boiler tube fails? - ANSWER-Replace the failed
tube
QUESTION: Before a wall burner is pulled for inspection - ANSWER-The fuel gas valve must be
shut
QUESTION: Which of the following is a type of insulation used inside furnaces? - ANSWER-Fire
Brick
QUESTION: What does "MTW" mean in reference to boiler tubing? - ANSWER-Minimum Wall
Thickness
,Page 3 of 36
QUESTION: On a drawing, what is used to record any changes to the drawing? - ANSWER-
Revision Block
QUESTION: Scales on a drawing are usually written in - ANSWER-inches and feet
QUESTION: Dimensional measurements can be found on all of the following except - ANSWER-
Mechanical flow diagram
QUESTION: All vessels elevations are taken from the - ANSWER-top of steel on the embed ring
(base plate)
QUESTION: A gate valve is being removed from a product line. All of the following procedures
must be performed except? - ANSWER-Valve must be in closed position
QUESTION: What is a spud wrench most commonly used for? - ANSWER-Aligning flanges
, Page 4 of 36
QUESTION: What type of valves are typically used on a sight glass to direct flow? - ANSWER-3
way valves
Q; When are steel chain slings recommended? - ANSWER-When rigging from three points
QUESTION: A big control valve is pulled who is responsible for the rigging? - ANSWER-Crane
operator and rigger
QUESTION: What should be used to hold the pipe when setting up two 40-foot joints of 16-inch
STD WT pipe? - ANSWER-4 legged roller top jacks
QUESTION: The hitch made by wrapping the sling around the load, then passing one eye of the
sling throughout a shackle is called? - ANSWER-Choker Hitch
QUESTION: When should rigging material be attached to a bean that is being demolished? -
ANSWER-Before any bolts are removed or any cutting is done on the beam.
