OHIO MAINTENANCE TECHNICIAN 2026/2027 EXAM VERIFIED WITH CORRECT
ANSWERS PLUS RATIONALES
1. What is the primary purpose of preventive maintenance?
A. Repair equipment only after failure
B. Reduce the likelihood of unexpected equipment failure
C. Increase equipment speed regardless of condition
D. Eliminate all maintenance costs
Correct Answer: B
Rationale: Preventive maintenance uses scheduled inspections, servicing, adjustment, cleaning,
and replacement to reduce failures and extend equipment life.
2. Which instrument is commonly used to measure electrical current?
A. Voltmeter
B. Ammeter
C. Ohmmeter
D. Manometer
Correct Answer: B
Rationale: An ammeter measures electrical current in amperes.
3. Which unit is used to measure electrical resistance?
A. Volt
B. Ampere
C. Ohm
D. Watt
Correct Answer: C
Rationale: Electrical resistance is measured in ohms (Ω).
4. A 120-V circuit has a resistance of 20 Ω. What is the current?
,A. 2 A
B. 4 A
C. 6 A
D. 10 A
Correct Answer: C
Rationale: Ohm's law gives I = V/R = 120/20 = 6 A.
5. What device protects an electrical circuit against excessive current by opening the
circuit?
A. Transformer
B. Fuse
C. Motor
D. Contactor
Correct Answer: B
Rationale: A fuse opens the circuit when excessive current causes its fusible element to melt.
6. Which type of maintenance is performed after equipment has already failed?
A. Preventive
B. Predictive
C. Corrective
D. Preventative inspection
Correct Answer: C
Rationale: Corrective maintenance restores equipment after a defect or failure has been
identified.
7. What is the primary purpose of lubrication on a bearing?
A. Increase friction
B. Reduce friction and wear
C. Increase electrical resistance
D. Eliminate alignment requirements
,Correct Answer: B
Rationale: Proper lubrication reduces friction and wear and helps control heat and
contamination.
8. Excessive bearing temperature may indicate:
A. Proper lubrication under all conditions
B. Lubrication problems, overload, or misalignment
C. Zero friction
D. Perfect alignment
Correct Answer: B
Rationale: Overheating can result from insufficient or excessive lubrication, excessive load,
misalignment, contamination, or bearing damage.
9. What is the main purpose of a bearing?
A. Support rotating components while reducing friction
B. Increase electrical voltage
C. Store compressed air
D. Measure shaft diameter
Correct Answer: A
Rationale: Bearings support rotating shafts or other moving components while reducing friction
between surfaces.
10. What is the purpose of a coupling between two shafts?
A. Transfer torque from one shaft to another
B. Measure voltage
C. Store hydraulic fluid
D. Reduce electrical frequency
Correct Answer: A
Rationale: Couplings connect shafts and transmit mechanical power and torque.
, 11. Two gears mesh directly with each other. If the driving gear rotates clockwise, the
driven gear rotates:
A. Clockwise
B. Counterclockwise
C. Without rotation
D. Randomly
Correct Answer: B
Rationale: Directly meshing gears rotate in opposite directions.
12. A smaller gear drives a larger gear. The larger gear generally rotates:
A. Faster
B. Slower
C. At exactly the same speed
D. Without torque
Correct Answer: B
Rationale: A larger driven gear rotates more slowly but generally provides greater torque.
13. What is the main purpose of a torque wrench?
A. Measure electrical resistance
B. Tighten fasteners to a specified torque
C. Cut conduit
D. Measure fluid pressure
Correct Answer: B
Rationale: A torque wrench allows a fastener to be tightened to a specified torque value.
14. Which tool is most appropriate for measuring the outside diameter of a precision shaft?
A. Micrometer
B. Pipe wrench
ANSWERS PLUS RATIONALES
1. What is the primary purpose of preventive maintenance?
A. Repair equipment only after failure
B. Reduce the likelihood of unexpected equipment failure
C. Increase equipment speed regardless of condition
D. Eliminate all maintenance costs
Correct Answer: B
Rationale: Preventive maintenance uses scheduled inspections, servicing, adjustment, cleaning,
and replacement to reduce failures and extend equipment life.
2. Which instrument is commonly used to measure electrical current?
A. Voltmeter
B. Ammeter
C. Ohmmeter
D. Manometer
Correct Answer: B
Rationale: An ammeter measures electrical current in amperes.
3. Which unit is used to measure electrical resistance?
A. Volt
B. Ampere
C. Ohm
D. Watt
Correct Answer: C
Rationale: Electrical resistance is measured in ohms (Ω).
4. A 120-V circuit has a resistance of 20 Ω. What is the current?
,A. 2 A
B. 4 A
C. 6 A
D. 10 A
Correct Answer: C
Rationale: Ohm's law gives I = V/R = 120/20 = 6 A.
5. What device protects an electrical circuit against excessive current by opening the
circuit?
A. Transformer
B. Fuse
C. Motor
D. Contactor
Correct Answer: B
Rationale: A fuse opens the circuit when excessive current causes its fusible element to melt.
6. Which type of maintenance is performed after equipment has already failed?
A. Preventive
B. Predictive
C. Corrective
D. Preventative inspection
Correct Answer: C
Rationale: Corrective maintenance restores equipment after a defect or failure has been
identified.
7. What is the primary purpose of lubrication on a bearing?
A. Increase friction
B. Reduce friction and wear
C. Increase electrical resistance
D. Eliminate alignment requirements
,Correct Answer: B
Rationale: Proper lubrication reduces friction and wear and helps control heat and
contamination.
8. Excessive bearing temperature may indicate:
A. Proper lubrication under all conditions
B. Lubrication problems, overload, or misalignment
C. Zero friction
D. Perfect alignment
Correct Answer: B
Rationale: Overheating can result from insufficient or excessive lubrication, excessive load,
misalignment, contamination, or bearing damage.
9. What is the main purpose of a bearing?
A. Support rotating components while reducing friction
B. Increase electrical voltage
C. Store compressed air
D. Measure shaft diameter
Correct Answer: A
Rationale: Bearings support rotating shafts or other moving components while reducing friction
between surfaces.
10. What is the purpose of a coupling between two shafts?
A. Transfer torque from one shaft to another
B. Measure voltage
C. Store hydraulic fluid
D. Reduce electrical frequency
Correct Answer: A
Rationale: Couplings connect shafts and transmit mechanical power and torque.
, 11. Two gears mesh directly with each other. If the driving gear rotates clockwise, the
driven gear rotates:
A. Clockwise
B. Counterclockwise
C. Without rotation
D. Randomly
Correct Answer: B
Rationale: Directly meshing gears rotate in opposite directions.
12. A smaller gear drives a larger gear. The larger gear generally rotates:
A. Faster
B. Slower
C. At exactly the same speed
D. Without torque
Correct Answer: B
Rationale: A larger driven gear rotates more slowly but generally provides greater torque.
13. What is the main purpose of a torque wrench?
A. Measure electrical resistance
B. Tighten fasteners to a specified torque
C. Cut conduit
D. Measure fluid pressure
Correct Answer: B
Rationale: A torque wrench allows a fastener to be tightened to a specified torque value.
14. Which tool is most appropriate for measuring the outside diameter of a precision shaft?
A. Micrometer
B. Pipe wrench
