OHIO MAINTENANCE TECHNICIAN EXAM –200 PRACTICE
QUESTIONS WITH VERIFIED CORRECT ANSWERS &
RATIONALES
1. What is the primary purpose of an equipment grounding
conductor?
A. To carry normal operating current
B. To increase circuit voltage
C. To provide a low-resistance path for fault current
D. To store electrical energy
Rationale: Equipment grounding conductors safely carry fault current to
trip overcurrent devices.
2. Which maintenance strategy is based on equipment condition
rather than time?
A. Predictive maintenance
B. Preventive maintenance
C. Reactive maintenance
D. Emergency maintenance
Rationale: Predictive maintenance uses condition monitoring to
determine when maintenance is needed.
3. What is the correct action when a lockout device must be removed
by someone other than the person who applied it?
A. Cut the lock immediately
B. Wait until the next shift
C. Follow the employer’s documented removal procedure
D. Ask the operator to remove it
Rationale: OSHA requires a specific written procedure for removing
another person’s lock.
,4. Which tool is best for measuring the inside diameter of a pipe?
A. Outside micrometer
B. Telescoping gauge
C. Feeler gauge
D. Depth micrometer
Rationale: Telescoping gauges transfer inside measurements to an
outside micrometer.
5. What does a red tag on a locked-out energy isolating device
indicate?
A. Equipment is safe to start
B. Equipment must not be operated
C. Equipment is due for inspection
D. Equipment is out of service for cleaning only
Rationale: A danger tag warns that the equipment must not be
energized or operated.
6. Which of the following is a common cause of hydraulic pump
cavitation?
A. Restricted inlet flow
B. Excessive fluid viscosity
C. Too much filtration
D. High fluid level
Rationale: Restricted inlet flow lowers pressure and causes vapor
bubbles to form.
7. What is the function of a PLC output card?
A. Convert sensor signals to digital data
B. Control external devices such as relays and solenoids
C. Supply power to the PLC processor
,D. Store the program
Rationale: Output cards send control signals from the PLC to field
devices.
8. Which bearing type is designed primarily for axial loads?
A. Radial ball bearing
B. Cylindrical roller bearing
C. Thrust bearing
D. Needle bearing
Rationale: Thrust bearings support loads parallel to the shaft axis.
9. What is the first step in troubleshooting an electrical circuit?
A. Replace the fuse
B. Verify the problem and gather information
C. Adjust the breaker
D. Disconnect all loads
Rationale: Effective troubleshooting begins with understanding the
symptoms and history.
10. Which of the following is a sign of a failing V-belt?
A. Smooth surface
B. Glazing and cracking
C. Correct tension
D. Even wear
Rationale: Glazing and cracking indicate heat damage and belt
deterioration.
11. What is the purpose of a pneumatic directional control valve?
A. Regulate air pressure
B. Control the path of airflow
C. Remove moisture from air
, D. Lubricate air tools
Rationale: Directional control valves determine where compressed air
flows.
12. Which document should be consulted before handling an
unknown chemical?
A. Work order
B. Safety data sheet
C. Maintenance log
D. Purchase order
Rationale: The SDS provides hazard, handling, and emergency
information.
13. What is the main function of a centrifugal pump impeller?
A. Seal the pump shaft
B. Impart kinetic energy to the fluid
C. Filter debris
D. Measure flow rate
Rationale: The impeller rotates and transfers energy to the liquid.
14. Which of the following is a preventive maintenance task for an
electric motor?
A. Inspecting and tightening electrical connections
B. Rewinding the motor annually
C. Replacing the rotor every month
D. Increasing the load
Rationale: Loose connections cause heat and voltage drop, so they
should be checked regularly.
15. What does a flashing red indicator on an HMI typically mean?
A. System is normal
QUESTIONS WITH VERIFIED CORRECT ANSWERS &
RATIONALES
1. What is the primary purpose of an equipment grounding
conductor?
A. To carry normal operating current
B. To increase circuit voltage
C. To provide a low-resistance path for fault current
D. To store electrical energy
Rationale: Equipment grounding conductors safely carry fault current to
trip overcurrent devices.
2. Which maintenance strategy is based on equipment condition
rather than time?
A. Predictive maintenance
B. Preventive maintenance
C. Reactive maintenance
D. Emergency maintenance
Rationale: Predictive maintenance uses condition monitoring to
determine when maintenance is needed.
3. What is the correct action when a lockout device must be removed
by someone other than the person who applied it?
A. Cut the lock immediately
B. Wait until the next shift
C. Follow the employer’s documented removal procedure
D. Ask the operator to remove it
Rationale: OSHA requires a specific written procedure for removing
another person’s lock.
,4. Which tool is best for measuring the inside diameter of a pipe?
A. Outside micrometer
B. Telescoping gauge
C. Feeler gauge
D. Depth micrometer
Rationale: Telescoping gauges transfer inside measurements to an
outside micrometer.
5. What does a red tag on a locked-out energy isolating device
indicate?
A. Equipment is safe to start
B. Equipment must not be operated
C. Equipment is due for inspection
D. Equipment is out of service for cleaning only
Rationale: A danger tag warns that the equipment must not be
energized or operated.
6. Which of the following is a common cause of hydraulic pump
cavitation?
A. Restricted inlet flow
B. Excessive fluid viscosity
C. Too much filtration
D. High fluid level
Rationale: Restricted inlet flow lowers pressure and causes vapor
bubbles to form.
7. What is the function of a PLC output card?
A. Convert sensor signals to digital data
B. Control external devices such as relays and solenoids
C. Supply power to the PLC processor
,D. Store the program
Rationale: Output cards send control signals from the PLC to field
devices.
8. Which bearing type is designed primarily for axial loads?
A. Radial ball bearing
B. Cylindrical roller bearing
C. Thrust bearing
D. Needle bearing
Rationale: Thrust bearings support loads parallel to the shaft axis.
9. What is the first step in troubleshooting an electrical circuit?
A. Replace the fuse
B. Verify the problem and gather information
C. Adjust the breaker
D. Disconnect all loads
Rationale: Effective troubleshooting begins with understanding the
symptoms and history.
10. Which of the following is a sign of a failing V-belt?
A. Smooth surface
B. Glazing and cracking
C. Correct tension
D. Even wear
Rationale: Glazing and cracking indicate heat damage and belt
deterioration.
11. What is the purpose of a pneumatic directional control valve?
A. Regulate air pressure
B. Control the path of airflow
C. Remove moisture from air
, D. Lubricate air tools
Rationale: Directional control valves determine where compressed air
flows.
12. Which document should be consulted before handling an
unknown chemical?
A. Work order
B. Safety data sheet
C. Maintenance log
D. Purchase order
Rationale: The SDS provides hazard, handling, and emergency
information.
13. What is the main function of a centrifugal pump impeller?
A. Seal the pump shaft
B. Impart kinetic energy to the fluid
C. Filter debris
D. Measure flow rate
Rationale: The impeller rotates and transfers energy to the liquid.
14. Which of the following is a preventive maintenance task for an
electric motor?
A. Inspecting and tightening electrical connections
B. Rewinding the motor annually
C. Replacing the rotor every month
D. Increasing the load
Rationale: Loose connections cause heat and voltage drop, so they
should be checked regularly.
15. What does a flashing red indicator on an HMI typically mean?
A. System is normal
