Practice Exam Questions And Correct

Millwright Journeyman Certification Practice Exam Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• 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.

• What is the primary purpose of a millwright?

a) Designing machines

b) Installing, maintaining, and repairing machinery

c) Supervising construction sites 1 / 4

d) Welding metal structures

Rationale: Millwrights specialize in machinery installation,

maintenance, and repair, rather than design.

• 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.

• 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.

• Which type of fastener is best for high-vibration environments?

a) Standard bolt

b) Locking bolt or locknut

c) Wood screw

d) Rivet 2 / 4

Rationale: Locking fasteners resist loosening due to vibration,

providing safer and more reliable connections.

• 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.

• 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.

• 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. 3 / 4

• 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.

• 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.

• 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.

• What is the purpose of shim stock?

a) Lubrication

• / 4