NCCER MILLWRIGHT EXAM QUESTIONS WITH CORRECT ANSWERS LATEST UPDATE 2026
What is used to highlight wear pattern in gear teeth? - Answers Bluing
The first step prior to pre-aligning a motor horizontally - Answers Inspect base plate
What 3 dimensions should be taken to fabricate a new flange gasket? - Answers Diameter of pipe
opening, outside diameter of flange, diameter of bolt circle
On assembly, what is used to identify sub assemblies? - Answers Circles
Bearing that is set too tight will cause premature failure because of - Answers Increased friction and
decreased clearance
Motors with open bearings should be thoroughly cleaned every - Answers Year
Most vertical pumps are driven by - Answers Electric motors
To measure shoulder relief on a shaft, use a - Answers Radius gauge
A flexible coupling is often installed on a pump and a motor to compensate for - Answers Small
differences in alignment
Machine frame distortion caused by tightening or loosening bolts of a single foot is called - Answers
Soft foot
What is gasket creep? - Answers Loss of thickness
A turbine has been secured. What piece of equipment keeps the rotor from bowing? - Answers The
turning gear
An impeller pumps efficiently when installed to - Answers Turn in one direction
Which of the following is not allowed on any job site? - Answers A metal hard hat
Cure for pump cavitations include - Answers Lowering the required head by reducing discharge
When transferring elevations, which tool is most precise? - Answers Optical level
Which shade of tinted lens should be used when oxy-fuel cutting and welding? - Answers 4-6
Why are colored threads woven into synthetic web slings? - Answers To indicate damage and/or wear
What is the pressure rise for a blower? - Answers 2-10 psig
A packing puller is used to remove packing material from - Answers A stuffing box
What type of drawing details inside dimension structural column locations and mounting? - Answers
Foundation layout
What are the two types of blades used in steam turbines? - Answers Impulse and reaction blades
Which radial fan blower is considered general purpose? - Answers Open type
What does a multi stage reciprocating compressor provide? - Answers Higher pressure
What is the most common cause of repeatability? - Answers Soft foot
The best way to fabricate a new flange gasket is to - Answers Use the old gasket as a template
Which of the following is the most common cause of wear on only one edge of a v belt? - Answers
Sheave groove misalignment
Power is transmitted from one shaft to another adjacent parallel shaft with - Answers Belts and chains
Which set of tools should be used to align a motor to a pump? - Answers Dial indicator, straight edge
The position of the lantern ring should be carefully noted when which of the following is removed? -
Answers Shaft packing
Reciprocating compressors are - Answers Positive displacement
The job calls for rigid couplings to be used. The alignment between driver and driven shafts must be -
Answers Precise
Radial bearings are mounted on the impeller shaft to prevent - Answers Perpendicular movement of
the shaft when the pump is running
Too great of a compression ration may cause excessive - Answers Discharge temperature
Screw conveyors are normally enclosed in - Answers Tubes
What is purpose of lock out/tag out? - Answers To prevent operation
Tension on the conveyor belts and chains is maintained by - Answers Take ups
The first step to installing a base plate is to establish - Answers Location
A shim should cover what minimum percent of the area being shimmed? - Answers 90%
What happens to a typical belt conveyor when tracking is changed? - Answers The belt moves from
side to side
What types of lines are used with dimension lines? - Answers Extension lines
What is the maximum pressure rise for a fan? - Answers 2psig
How is an impeller held on a shaft? - Answers With threads or nuts
What is a Babbitt most commonly made of? - Answers Tin and lead
What is used to highlight wear pattern in gear teeth? - Answers Bluing
The first step prior to pre-aligning a motor horizontally - Answers Inspect base plate
What 3 dimensions should be taken to fabricate a new flange gasket? - Answers Diameter of pipe
opening, outside diameter of flange, diameter of bolt circle
On assembly, what is used to identify sub assemblies? - Answers Circles
Bearing that is set too tight will cause premature failure because of - Answers Increased friction and
decreased clearance
Motors with open bearings should be thoroughly cleaned every - Answers Year
Most vertical pumps are driven by - Answers Electric motors
To measure shoulder relief on a shaft, use a - Answers Radius gauge
A flexible coupling is often installed on a pump and a motor to compensate for - Answers Small
differences in alignment
Machine frame distortion caused by tightening or loosening bolts of a single foot is called - Answers
Soft foot
What is gasket creep? - Answers Loss of thickness
A turbine has been secured. What piece of equipment keeps the rotor from bowing? - Answers The
turning gear
An impeller pumps efficiently when installed to - Answers Turn in one direction
Which of the following is not allowed on any job site? - Answers A metal hard hat
Cure for pump cavitations include - Answers Lowering the required head by reducing discharge
When transferring elevations, which tool is most precise? - Answers Optical level
Which shade of tinted lens should be used when oxy-fuel cutting and welding? - Answers 4-6
Why are colored threads woven into synthetic web slings? - Answers To indicate damage and/or wear
What is the pressure rise for a blower? - Answers 2-10 psig
A packing puller is used to remove packing material from - Answers A stuffing box
What type of drawing details inside dimension structural column locations and mounting? - Answers
Foundation layout
What are the two types of blades used in steam turbines? - Answers Impulse and reaction blades
Which radial fan blower is considered general purpose? - Answers Open type
What does a multi stage reciprocating compressor provide? - Answers Higher pressure
What is the most common cause of repeatability? - Answers Soft foot
The best way to fabricate a new flange gasket is to - Answers Use the old gasket as a template
Which of the following is the most common cause of wear on only one edge of a v belt? - Answers
Sheave groove misalignment
Power is transmitted from one shaft to another adjacent parallel shaft with - Answers Belts and chains
Which set of tools should be used to align a motor to a pump? - Answers Dial indicator, straight edge
The position of the lantern ring should be carefully noted when which of the following is removed? -
Answers Shaft packing
Reciprocating compressors are - Answers Positive displacement
The job calls for rigid couplings to be used. The alignment between driver and driven shafts must be -
Answers Precise
Radial bearings are mounted on the impeller shaft to prevent - Answers Perpendicular movement of
the shaft when the pump is running
Too great of a compression ration may cause excessive - Answers Discharge temperature
Screw conveyors are normally enclosed in - Answers Tubes
What is purpose of lock out/tag out? - Answers To prevent operation
Tension on the conveyor belts and chains is maintained by - Answers Take ups
The first step to installing a base plate is to establish - Answers Location
A shim should cover what minimum percent of the area being shimmed? - Answers 90%
What happens to a typical belt conveyor when tracking is changed? - Answers The belt moves from
side to side
What types of lines are used with dimension lines? - Answers Extension lines
What is the maximum pressure rise for a fan? - Answers 2psig
How is an impeller held on a shaft? - Answers With threads or nuts
What is a Babbitt most commonly made of? - Answers Tin and lead
