MILLWRIGHT JOURNEYMAN
CERTIFICATION EXAM QUESTIONS AND
CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A
| INSTANT DOWNLOAD PDF
1. Which of the following tools is specifically used to align shafts?
a) Calipers
b) Feeler gauge
c) Dial indicator
d) Torque wrench
Rationale: Dial indicators are precise instruments used to measure shaft
misalignment.
2. When installing a new pump, what is the primary purpose of a laser
alignment tool?
a) To measure pressure
b) To ensure shaft alignment
c) To verify fluid flow
d) To check bearing wear
Rationale: Laser alignment tools are used to align shafts accurately to
prevent premature bearing and coupling failure.
3. Which type of bearing is best suited for handling combined radial and axial
loads?
a) Sleeve bearing
b) Angular contact ball bearing
c) Thrust washer
d) Plain bearing
, Rationale: Angular contact ball bearings can handle both radial and axial
loads simultaneously.
4. What is the standard unit for torque in the Imperial system?
a) Pounds
b) Pounds per square inch
c) Foot-pounds
d) Newton-meters
Rationale: Torque is commonly measured in foot-pounds in the Imperial
system.
5. The primary purpose of a millwright is to:
a) Design machinery
b) Install, maintain, and repair industrial machinery
c) Operate machinery
d) Inspect finished products
Rationale: Millwrights specialize in installing, maintaining, and repairing
heavy industrial equipment.
6. When lifting heavy equipment, the first step is to:
a) Assess the load and select proper rigging
b) Start the crane immediately
c) Disconnect all machinery
d) Check the floor condition only
Rationale: Proper assessment ensures safe lifting and prevents accidents.
7. Which of the following is a primary cause of shaft misalignment?
a) Overlubrication
b) Excessive vibration only
c) Thermal expansion and foundation settlement
d) Improper torque
Rationale: Thermal expansion and uneven foundation settling commonly
cause misalignment.
,8. A micrometer with a 0.001-inch resolution is typically used to measure:
a) Shaft diameter roughly
b) Bolt length
c) Precise thickness of machine components
d) Large gear alignment
Rationale: Micrometers are precision tools for small, accurate
measurements.
9. Which type of fit allows easy assembly and disassembly?
a) Interference fit
b) Clearance fit
c) Press fit
d) Shrink fit
Rationale: Clearance fits provide space between components for easy
assembly.
10.Which lubricant is commonly used in high-speed spindle bearings?
a) Grease only
b) Water
c) Oil with high viscosity index
d) Dry graphite
Rationale: High-speed bearings require oil that maintains a stable
viscosity under varying temperatures.
11.When tensioning a chain drive, the slack should be measured at:
a) The midpoint between sprockets
b) Only at the tightest point
c) Mid-span between sprockets
d) At the motor end
Rationale: Mid-span measurement gives an accurate indication of proper
chain tension.
12.A horizontal milling machine is used primarily for:
a) Drilling holes
b) Grinding surfaces
, c) Cutting slots and grooves
d) Polishing parts
Rationale: Horizontal mills are ideal for cutting slots and grooves on
workpieces.
13.When using a torque wrench, it is important to:
a) Use any extension bar
b) Apply torque slowly and steadily
c) Apply maximum force instantly
d) Tighten bolts without calibration
Rationale: Slow, steady torque ensures accurate bolt tension and prevents
damage.
14.What is the purpose of shimming a baseplate?
a) Increase vibration
b) Level machinery and reduce misalignment
c) Reduce lubrication needs
d) Protect bearings only
Rationale: Shims adjust height to level machines, preventing
misalignment and excessive wear.
15.Which type of hammer is best for precision fitting of metal components?
a) Sledgehammer
b) Club hammer
c) Ball-peen hammer
d) Mallet
Rationale: Ball-peen hammers are used for metal shaping and fitting
without excessive damage.
16.During machinery teardown, the first step is:
a) Remove all fasteners randomly
b) Lock out and tag out the equipment
c) Drain oil only
d) Disassemble bearings first
CERTIFICATION EXAM QUESTIONS AND
CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A
| INSTANT DOWNLOAD PDF
1. Which of the following tools is specifically used to align shafts?
a) Calipers
b) Feeler gauge
c) Dial indicator
d) Torque wrench
Rationale: Dial indicators are precise instruments used to measure shaft
misalignment.
2. When installing a new pump, what is the primary purpose of a laser
alignment tool?
a) To measure pressure
b) To ensure shaft alignment
c) To verify fluid flow
d) To check bearing wear
Rationale: Laser alignment tools are used to align shafts accurately to
prevent premature bearing and coupling failure.
3. Which type of bearing is best suited for handling combined radial and axial
loads?
a) Sleeve bearing
b) Angular contact ball bearing
c) Thrust washer
d) Plain bearing
, Rationale: Angular contact ball bearings can handle both radial and axial
loads simultaneously.
4. What is the standard unit for torque in the Imperial system?
a) Pounds
b) Pounds per square inch
c) Foot-pounds
d) Newton-meters
Rationale: Torque is commonly measured in foot-pounds in the Imperial
system.
5. The primary purpose of a millwright is to:
a) Design machinery
b) Install, maintain, and repair industrial machinery
c) Operate machinery
d) Inspect finished products
Rationale: Millwrights specialize in installing, maintaining, and repairing
heavy industrial equipment.
6. When lifting heavy equipment, the first step is to:
a) Assess the load and select proper rigging
b) Start the crane immediately
c) Disconnect all machinery
d) Check the floor condition only
Rationale: Proper assessment ensures safe lifting and prevents accidents.
7. Which of the following is a primary cause of shaft misalignment?
a) Overlubrication
b) Excessive vibration only
c) Thermal expansion and foundation settlement
d) Improper torque
Rationale: Thermal expansion and uneven foundation settling commonly
cause misalignment.
,8. A micrometer with a 0.001-inch resolution is typically used to measure:
a) Shaft diameter roughly
b) Bolt length
c) Precise thickness of machine components
d) Large gear alignment
Rationale: Micrometers are precision tools for small, accurate
measurements.
9. Which type of fit allows easy assembly and disassembly?
a) Interference fit
b) Clearance fit
c) Press fit
d) Shrink fit
Rationale: Clearance fits provide space between components for easy
assembly.
10.Which lubricant is commonly used in high-speed spindle bearings?
a) Grease only
b) Water
c) Oil with high viscosity index
d) Dry graphite
Rationale: High-speed bearings require oil that maintains a stable
viscosity under varying temperatures.
11.When tensioning a chain drive, the slack should be measured at:
a) The midpoint between sprockets
b) Only at the tightest point
c) Mid-span between sprockets
d) At the motor end
Rationale: Mid-span measurement gives an accurate indication of proper
chain tension.
12.A horizontal milling machine is used primarily for:
a) Drilling holes
b) Grinding surfaces
, c) Cutting slots and grooves
d) Polishing parts
Rationale: Horizontal mills are ideal for cutting slots and grooves on
workpieces.
13.When using a torque wrench, it is important to:
a) Use any extension bar
b) Apply torque slowly and steadily
c) Apply maximum force instantly
d) Tighten bolts without calibration
Rationale: Slow, steady torque ensures accurate bolt tension and prevents
damage.
14.What is the purpose of shimming a baseplate?
a) Increase vibration
b) Level machinery and reduce misalignment
c) Reduce lubrication needs
d) Protect bearings only
Rationale: Shims adjust height to level machines, preventing
misalignment and excessive wear.
15.Which type of hammer is best for precision fitting of metal components?
a) Sledgehammer
b) Club hammer
c) Ball-peen hammer
d) Mallet
Rationale: Ball-peen hammers are used for metal shaping and fitting
without excessive damage.
16.During machinery teardown, the first step is:
a) Remove all fasteners randomly
b) Lock out and tag out the equipment
c) Drain oil only
d) Disassemble bearings first
