Millwright Journeyman Certification
Practice Exam Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
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1. Which tool is commonly used to check the alignment of shafts?
a) Vernier caliper
b) Micrometer
c) Dial indicator
d) Feeler gauge
Rationale: A dial indicator is used to measure small variations in
shaft alignment, ensuring precision in machinery setup.
2. What is the primary purpose of a millwright?
a) Designing machines
b) Installing, maintaining, and repairing machinery
c) Supervising construction sites
, d) Welding metal structures
Rationale: Millwrights specialize in machinery installation,
maintenance, and repair, rather than design.
3. When lifting heavy equipment, what is the most important factor to
consider?
a) Operator skill
b) Equipment color
c) Load weight and center of gravity
d) Noise level
Rationale: Knowing the load weight and center of gravity is essential
for safe lifting and rigging operations.
4. What does OSHA require before beginning work on a machine?
a) Clean the workspace
b) Lockout/tagout procedures
c) Measure temperature
d) Check lighting
Rationale: Lockout/tagout ensures machines cannot start
unexpectedly, preventing accidents.
5. Which type of fastener is best for high-vibration environments?
a) Standard bolt
b) Locking bolt or locknut
c) Wood screw
d) Rivet
, Rationale: Locking fasteners resist loosening due to vibration,
providing safer and more reliable connections.
6. How do you measure the shaft runout?
a) Using a ruler
b) Using a torque wrench
c) Using a dial indicator
d) Using a caliper
Rationale: Dial indicators measure the deviation of a rotating shaft
from its true axis, known as runout.
7. What is the safest way to handle hydraulic equipment?
a) Operate at full pressure
b) Ignore leaks
c) Follow manufacturer guidelines and inspect hoses
d) Use water to cool components
Rationale: Proper inspection and adherence to guidelines prevent
failures and injuries from hydraulic pressure.
8. What is a key indicator that a bearing may be failing?
a) Color change
b) Weight increase
c) Excessive noise or vibration
d) Lubricant color
Rationale: Noise and vibration are common signs of bearing wear or
misalignment.
, 9. What is the function of a key in a shaft and pulley assembly?
a) Reduce friction
b) Transmit torque
c) Support weight
d) Lubricate surfaces
Rationale: Keys fit into slots on shafts and pulleys to transmit
rotational force securely.
10. What type of alignment uses laser tools?
a) Rough alignment
b) Precision shaft alignment
c) Leveling
d) Thread alignment
Rationale: Laser alignment provides highly accurate measurements
for aligning shafts in precision machinery.
11. When using a chain hoist, what is the first step?
a) Lift the load immediately
b) Oil the chain
c) Inspect the hoist and ensure the load is within capacity
d) Adjust chain length
Rationale: Safety inspection and load verification prevent accidents
and equipment damage.
12. What is the purpose of shim stock?
a) Lubrication
Practice Exam Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
Download Pdf
1. Which tool is commonly used to check the alignment of shafts?
a) Vernier caliper
b) Micrometer
c) Dial indicator
d) Feeler gauge
Rationale: A dial indicator is used to measure small variations in
shaft alignment, ensuring precision in machinery setup.
2. What is the primary purpose of a millwright?
a) Designing machines
b) Installing, maintaining, and repairing machinery
c) Supervising construction sites
, d) Welding metal structures
Rationale: Millwrights specialize in machinery installation,
maintenance, and repair, rather than design.
3. When lifting heavy equipment, what is the most important factor to
consider?
a) Operator skill
b) Equipment color
c) Load weight and center of gravity
d) Noise level
Rationale: Knowing the load weight and center of gravity is essential
for safe lifting and rigging operations.
4. What does OSHA require before beginning work on a machine?
a) Clean the workspace
b) Lockout/tagout procedures
c) Measure temperature
d) Check lighting
Rationale: Lockout/tagout ensures machines cannot start
unexpectedly, preventing accidents.
5. Which type of fastener is best for high-vibration environments?
a) Standard bolt
b) Locking bolt or locknut
c) Wood screw
d) Rivet
, Rationale: Locking fasteners resist loosening due to vibration,
providing safer and more reliable connections.
6. How do you measure the shaft runout?
a) Using a ruler
b) Using a torque wrench
c) Using a dial indicator
d) Using a caliper
Rationale: Dial indicators measure the deviation of a rotating shaft
from its true axis, known as runout.
7. What is the safest way to handle hydraulic equipment?
a) Operate at full pressure
b) Ignore leaks
c) Follow manufacturer guidelines and inspect hoses
d) Use water to cool components
Rationale: Proper inspection and adherence to guidelines prevent
failures and injuries from hydraulic pressure.
8. What is a key indicator that a bearing may be failing?
a) Color change
b) Weight increase
c) Excessive noise or vibration
d) Lubricant color
Rationale: Noise and vibration are common signs of bearing wear or
misalignment.
, 9. What is the function of a key in a shaft and pulley assembly?
a) Reduce friction
b) Transmit torque
c) Support weight
d) Lubricate surfaces
Rationale: Keys fit into slots on shafts and pulleys to transmit
rotational force securely.
10. What type of alignment uses laser tools?
a) Rough alignment
b) Precision shaft alignment
c) Leveling
d) Thread alignment
Rationale: Laser alignment provides highly accurate measurements
for aligning shafts in precision machinery.
11. When using a chain hoist, what is the first step?
a) Lift the load immediately
b) Oil the chain
c) Inspect the hoist and ensure the load is within capacity
d) Adjust chain length
Rationale: Safety inspection and load verification prevent accidents
and equipment damage.
12. What is the purpose of shim stock?
a) Lubrication
