Millwright Journeyman Certification
Exam Practice Questions And Correct
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Rationale 2026 Q&A| Instant Download
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1. A millwright is aligning a newly installed electric motor to a pump
coupling using a dial indicator. Which condition most directly indicates
angular misalignment between the shafts?
A. Equal radial readings at all clock positions
B. A consistent offset reading that does not change during rotation
C. Varying axial readings at different clock positions around the
coupling
D. Zero end play in the coupling hub
Answer: C
Angular misalignment is identified when dial indicator readings vary
as the shaft is rotated, showing that the shafts are not parallel and
the angular relationship changes around the coupling circumference.
2. Which tool is most appropriate for detecting small deviations in shaft
straightness during alignment checks?
A. Feeler gauge
B. Dial indicator
, C. Torque wrench
D. Hydraulic press
Answer: B
A dial indicator provides highly sensitive measurement of minute
shaft deflections and is the standard instrument for checking runout
and straightness in rotating equipment.
3. When installing a belt drive system, excessive belt tension is most
likely to result in which outcome?
A. Reduced bearing load and extended bearing life
B. Increased bearing load leading to premature failure
C. Improved energy efficiency due to reduced slip
D. Decreased pulley wear and vibration
Answer: B
Excessive belt tension increases radial load on bearings, causing
overheating, accelerated wear, and premature bearing failure.
4. What is the primary purpose of grouting under a machine baseplate?
A. To improve electrical grounding
B. To increase machine speed stability
C. To provide full contact support and dampen vibration
D. To reduce lubrication requirements
Answer: C
Grouting fills voids beneath baseplates, ensuring full support,
improving load distribution, and reducing vibration transmission to
the foundation.
5. Which type of bearing is best suited for handling both radial and axial
loads in high-speed applications?
A. Plain sleeve bearing
B. Ball bearing
C. Thrust washer
, D. Magnetic bearing
Answer: B
Ball bearings are designed to handle combined radial and axial loads
efficiently, making them suitable for high-speed rotating equipment.
6. During precision alignment, a “soft foot” condition refers to:
A. Excess lubrication under the baseplate
B. Uneven support under a machine foot causing distortion when
bolted down
C. Flexible coupling misalignment
D. Loose foundation anchor bolts only
Answer: B
Soft foot occurs when one or more machine feet do not sit flat on the
base, causing frame distortion when tightened and leading to
misalignment.
7. What is the primary function of a flexible coupling in a rotating
system?
A. Increase torque output
B. Allow for minor misalignment while transmitting torque
C. Reduce shaft diameter
D. Eliminate need for lubrication
Answer: B
Flexible couplings accommodate small amounts of angular, parallel,
or axial misalignment while still transmitting rotational power.
8. Which condition is most likely to cause cavitation in a centrifugal
pump?
A. Excessive discharge pressure
B. Insufficient suction pressure below vapor pressure
C. Oversized impeller diameter
D. High bearing lubrication
Exam Practice Questions And Correct
Answers (Verified Answers) Plus
Rationale 2026 Q&A| Instant Download
1. A millwright is aligning a newly installed electric motor to a pump
coupling using a dial indicator. Which condition most directly indicates
angular misalignment between the shafts?
A. Equal radial readings at all clock positions
B. A consistent offset reading that does not change during rotation
C. Varying axial readings at different clock positions around the
coupling
D. Zero end play in the coupling hub
Answer: C
Angular misalignment is identified when dial indicator readings vary
as the shaft is rotated, showing that the shafts are not parallel and
the angular relationship changes around the coupling circumference.
2. Which tool is most appropriate for detecting small deviations in shaft
straightness during alignment checks?
A. Feeler gauge
B. Dial indicator
, C. Torque wrench
D. Hydraulic press
Answer: B
A dial indicator provides highly sensitive measurement of minute
shaft deflections and is the standard instrument for checking runout
and straightness in rotating equipment.
3. When installing a belt drive system, excessive belt tension is most
likely to result in which outcome?
A. Reduced bearing load and extended bearing life
B. Increased bearing load leading to premature failure
C. Improved energy efficiency due to reduced slip
D. Decreased pulley wear and vibration
Answer: B
Excessive belt tension increases radial load on bearings, causing
overheating, accelerated wear, and premature bearing failure.
4. What is the primary purpose of grouting under a machine baseplate?
A. To improve electrical grounding
B. To increase machine speed stability
C. To provide full contact support and dampen vibration
D. To reduce lubrication requirements
Answer: C
Grouting fills voids beneath baseplates, ensuring full support,
improving load distribution, and reducing vibration transmission to
the foundation.
5. Which type of bearing is best suited for handling both radial and axial
loads in high-speed applications?
A. Plain sleeve bearing
B. Ball bearing
C. Thrust washer
, D. Magnetic bearing
Answer: B
Ball bearings are designed to handle combined radial and axial loads
efficiently, making them suitable for high-speed rotating equipment.
6. During precision alignment, a “soft foot” condition refers to:
A. Excess lubrication under the baseplate
B. Uneven support under a machine foot causing distortion when
bolted down
C. Flexible coupling misalignment
D. Loose foundation anchor bolts only
Answer: B
Soft foot occurs when one or more machine feet do not sit flat on the
base, causing frame distortion when tightened and leading to
misalignment.
7. What is the primary function of a flexible coupling in a rotating
system?
A. Increase torque output
B. Allow for minor misalignment while transmitting torque
C. Reduce shaft diameter
D. Eliminate need for lubrication
Answer: B
Flexible couplings accommodate small amounts of angular, parallel,
or axial misalignment while still transmitting rotational power.
8. Which condition is most likely to cause cavitation in a centrifugal
pump?
A. Excessive discharge pressure
B. Insufficient suction pressure below vapor pressure
C. Oversized impeller diameter
D. High bearing lubrication
