MILLWRIGHT CERTIFICATION EXAM
PRACTICE QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) PLUS
RATIONALES 2026 Q&A | INSTANT
DOWNLOAD PDF
1. What is the primary function of a millwright?
A. To design machinery
B. To install, align, and maintain industrial equipment
C. To operate heavy machinery
D. To inspect construction materials
Millwrights specialize in installing, aligning, and maintaining
industrial machinery.
2. Which measuring tool is most accurate for checking shaft
alignment?
A. Vernier caliper
B. Tape measure
C. Dial indicator
D. Micrometer
Dial indicators provide precise readings for alignment work.
3. When aligning two coupled shafts, what is the main goal?
A. To make them parallel
B. To have the axes of rotation in line
C. To reduce vibration
D. To ensure tight coupling
, Alignment ensures both shafts rotate on the same axis, minimizing
wear.
4. What type of bearing is designed to handle axial loads?
A. Ball bearing
B. Roller bearing
C. Thrust bearing
D. Sleeve bearing
Thrust bearings support axial (end) loads along a shaft.
5. What is the most common type of coupling used in millwrighting?
A. Gear coupling
B. Flexible coupling
C. Rigid coupling
D. Chain coupling
Flexible couplings compensate for slight misalignment between
shafts.
6. Which instrument measures angular misalignment?
A. Feeler gauge
B. Protractor
C. Level
D. Micrometer
Protractors are used to measure angles between surfaces.
7. What safety gear is required when grinding metal?
A. Gloves only
B. Face shield and safety glasses
C. Hard hat only
D. Hearing protection only
Eye and face protection prevent injury from sparks and debris.
, 8. Which of the following tools is used to check flatness?
A. Micrometer
B. Straight edge
C. Feeler gauge
D. Caliper
A straight edge is used with light or feeler gauges to check surface
flatness.
9. What does “soft foot” mean in machine installation?
A. One or more feet of the machine do not sit flat on the base
B. The base is not level
C. The foundation bolts are loose
D. The shaft is bent
Soft foot can cause misalignment and vibration.
10. What is the function of a coupling guard?
A. Cooling
B. Alignment
C. Safety
D. Lubrication
Coupling guards protect workers from rotating parts.
11. Which lubricant is commonly used for high-speed bearings?
A. Heavy grease
B. Motor oil
C. Light grease or oil
D. Dry graphite
High-speed bearings require light lubricants to reduce friction.
12. What is the standard unit for torque measurement?
A. Foot-pound
PRACTICE QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS) PLUS
RATIONALES 2026 Q&A | INSTANT
DOWNLOAD PDF
1. What is the primary function of a millwright?
A. To design machinery
B. To install, align, and maintain industrial equipment
C. To operate heavy machinery
D. To inspect construction materials
Millwrights specialize in installing, aligning, and maintaining
industrial machinery.
2. Which measuring tool is most accurate for checking shaft
alignment?
A. Vernier caliper
B. Tape measure
C. Dial indicator
D. Micrometer
Dial indicators provide precise readings for alignment work.
3. When aligning two coupled shafts, what is the main goal?
A. To make them parallel
B. To have the axes of rotation in line
C. To reduce vibration
D. To ensure tight coupling
, Alignment ensures both shafts rotate on the same axis, minimizing
wear.
4. What type of bearing is designed to handle axial loads?
A. Ball bearing
B. Roller bearing
C. Thrust bearing
D. Sleeve bearing
Thrust bearings support axial (end) loads along a shaft.
5. What is the most common type of coupling used in millwrighting?
A. Gear coupling
B. Flexible coupling
C. Rigid coupling
D. Chain coupling
Flexible couplings compensate for slight misalignment between
shafts.
6. Which instrument measures angular misalignment?
A. Feeler gauge
B. Protractor
C. Level
D. Micrometer
Protractors are used to measure angles between surfaces.
7. What safety gear is required when grinding metal?
A. Gloves only
B. Face shield and safety glasses
C. Hard hat only
D. Hearing protection only
Eye and face protection prevent injury from sparks and debris.
, 8. Which of the following tools is used to check flatness?
A. Micrometer
B. Straight edge
C. Feeler gauge
D. Caliper
A straight edge is used with light or feeler gauges to check surface
flatness.
9. What does “soft foot” mean in machine installation?
A. One or more feet of the machine do not sit flat on the base
B. The base is not level
C. The foundation bolts are loose
D. The shaft is bent
Soft foot can cause misalignment and vibration.
10. What is the function of a coupling guard?
A. Cooling
B. Alignment
C. Safety
D. Lubrication
Coupling guards protect workers from rotating parts.
11. Which lubricant is commonly used for high-speed bearings?
A. Heavy grease
B. Motor oil
C. Light grease or oil
D. Dry graphite
High-speed bearings require light lubricants to reduce friction.
12. What is the standard unit for torque measurement?
A. Foot-pound
