Florida Millwright Certification Exam – Practice
Test Questions And Correct Answers (Verified
Answers) Plus Rationales 2025/2026 Q&A | Instant
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1. Which tool is most commonly used by a millwright to check shaft
alignment?
a) Vernier caliper
b) Dial indicator
c) Feeler gauge
d) Micrometer
Answer: b) Dial indicator
Rationale: A dial indicator provides precise measurement of shaft runout
and alignment, making it the standard tool for millwrights in alignment
tasks.
2. What is the primary purpose of a coupling between two shafts?
a) To reduce friction
b) To absorb vibration and allow misalignment
c) To prevent lubrication leakage
d) To increase shaft torque
Answer: b) To absorb vibration and allow misalignment
, Rationale: Couplings join two shafts while accommodating slight
misalignment and dampening vibration.
3. When tightening bolts in a flange connection, the correct sequence is:
a) Circular pattern clockwise
b) Circular pattern counterclockwise
c) Star or crisscross pattern
d) Random tightening
Answer: c) Star or crisscross pattern
Rationale: A star or crisscross pattern ensures even pressure distribution
and prevents flange distortion.
4. Which measuring tool is most accurate for checking outside diameters?
a) Steel rule
b) Vernier caliper
c) Outside micrometer
d) Combination square
Answer: c) Outside micrometer
Rationale: Micrometers provide precise measurement in thousandths of
an inch, more accurate than calipers.
5. A millwright uses a plumb bob primarily for:
a) Measuring shaft runout
b) Establishing vertical alignment
c) Checking horizontal level
d) Measuring torque
Answer: b) Establishing vertical alignment
, Rationale: A plumb bob is a gravity-based tool used to determine vertical
alignment.
6. What is the function of a feeler gauge?
a) Measuring bolt torque
b) Checking bearing clearance
c) Measuring vibration
d) Measuring shaft speed
Answer: b) Checking bearing clearance
Rationale: Feeler gauges measure small gaps or clearances such as
between bearings and shafts.
7. Which type of bearing is designed to handle both radial and axial loads?
a) Plain bearing
b) Thrust bearing
c) Ball bearing
d) Needle bearing
Answer: c) Ball bearing
Rationale: Ball bearings can support both radial and axial (thrust) loads
effectively.
8. Which OSHA standard applies to lockout/tagout procedures?
a) 1910.120
b) 1910.147
c) 1926.21
d) 1910.1000
Answer: b) 1910.147
, Rationale: OSHA 1910.147 covers lockout/tagout for control of hazardous
energy.
9. The main function of shims in alignment work is:
a) To prevent vibration
b) To correct vertical misalignment
c) To reduce heat
d) To lubricate moving parts
Answer: b) To correct vertical misalignment
Rationale: Shims are placed under machine feet to raise or lower them,
correcting vertical misalignment.
10.Which type of coupling is commonly used for misalignment compensation?
a) Flange coupling
b) Rigid coupling
c) Flexible coupling
d) Sleeve coupling
Answer: c) Flexible coupling
Rationale: Flexible couplings allow for angular and parallel misalignment
while transmitting power.
11.What instrument is most suitable for measuring vibration in rotating
machinery?
a) Torque wrench
b) Dial indicator
c) Accelerometer
d) Feeler gauge
Test Questions And Correct Answers (Verified
Answers) Plus Rationales 2025/2026 Q&A | Instant
Download Pdf
1. Which tool is most commonly used by a millwright to check shaft
alignment?
a) Vernier caliper
b) Dial indicator
c) Feeler gauge
d) Micrometer
Answer: b) Dial indicator
Rationale: A dial indicator provides precise measurement of shaft runout
and alignment, making it the standard tool for millwrights in alignment
tasks.
2. What is the primary purpose of a coupling between two shafts?
a) To reduce friction
b) To absorb vibration and allow misalignment
c) To prevent lubrication leakage
d) To increase shaft torque
Answer: b) To absorb vibration and allow misalignment
, Rationale: Couplings join two shafts while accommodating slight
misalignment and dampening vibration.
3. When tightening bolts in a flange connection, the correct sequence is:
a) Circular pattern clockwise
b) Circular pattern counterclockwise
c) Star or crisscross pattern
d) Random tightening
Answer: c) Star or crisscross pattern
Rationale: A star or crisscross pattern ensures even pressure distribution
and prevents flange distortion.
4. Which measuring tool is most accurate for checking outside diameters?
a) Steel rule
b) Vernier caliper
c) Outside micrometer
d) Combination square
Answer: c) Outside micrometer
Rationale: Micrometers provide precise measurement in thousandths of
an inch, more accurate than calipers.
5. A millwright uses a plumb bob primarily for:
a) Measuring shaft runout
b) Establishing vertical alignment
c) Checking horizontal level
d) Measuring torque
Answer: b) Establishing vertical alignment
, Rationale: A plumb bob is a gravity-based tool used to determine vertical
alignment.
6. What is the function of a feeler gauge?
a) Measuring bolt torque
b) Checking bearing clearance
c) Measuring vibration
d) Measuring shaft speed
Answer: b) Checking bearing clearance
Rationale: Feeler gauges measure small gaps or clearances such as
between bearings and shafts.
7. Which type of bearing is designed to handle both radial and axial loads?
a) Plain bearing
b) Thrust bearing
c) Ball bearing
d) Needle bearing
Answer: c) Ball bearing
Rationale: Ball bearings can support both radial and axial (thrust) loads
effectively.
8. Which OSHA standard applies to lockout/tagout procedures?
a) 1910.120
b) 1910.147
c) 1926.21
d) 1910.1000
Answer: b) 1910.147
, Rationale: OSHA 1910.147 covers lockout/tagout for control of hazardous
energy.
9. The main function of shims in alignment work is:
a) To prevent vibration
b) To correct vertical misalignment
c) To reduce heat
d) To lubricate moving parts
Answer: b) To correct vertical misalignment
Rationale: Shims are placed under machine feet to raise or lower them,
correcting vertical misalignment.
10.Which type of coupling is commonly used for misalignment compensation?
a) Flange coupling
b) Rigid coupling
c) Flexible coupling
d) Sleeve coupling
Answer: c) Flexible coupling
Rationale: Flexible couplings allow for angular and parallel misalignment
while transmitting power.
11.What instrument is most suitable for measuring vibration in rotating
machinery?
a) Torque wrench
b) Dial indicator
c) Accelerometer
d) Feeler gauge
