Exam Practice Questions And Correct

Ohio Industrial Maintenance Technician Exam Practice Questions And Correct Answers (Verified Answers) Plus Rationales 2025|2026 Q&A | Instant Download Pdf

• Which tool is best for measuring the diameter of a shaft with high

precision?

• Ruler
• Micrometer
• Tape measure
• Caliper

Rationale: A micrometer provides precise measurements of small

diameters, typically more accurate than a caliper or tape measure.

• What is the primary function of a centrifugal pump?
• Convert pressure to flow
• Move fluids by converting rotational kinetic energy into pressure 1 / 4

• Store hydraulic energy
• Compress air

Rationale: Centrifugal pumps use rotational motion to increase fluid

pressure and flow.

• In a three-phase electrical system, which connection is commonly

used for motor operation?

• Series
• Delta or Wye (Star)
• Parallel
• Single-phase

Rationale: Three-phase motors typically use Delta or Wye connections for

efficient operation.

• What is the purpose of a V-belt in industrial machinery?
• Conduct electricity
• Transmit mechanical power between shafts
• Lubricate moving parts
• Support the motor

Rationale: V-belts transfer rotational motion between pulleys to drive

equipment.

• Which type of maintenance is performed after equipment failure?
• Preventive
• Predictive 2 / 4

• Corrective
• Routine

Rationale: Corrective maintenance addresses equipment failures after they

occur.

• What is the standard color for grounding conductors in the U.S.?
• Red
• Blue
• Green or green with yellow stripe
• Black

Rationale: Grounding conductors are green or green/yellow to distinguish

them from power and neutral wires.

• What does a hydraulic accumulator do?
• Generates electricity
• Stores hydraulic energy under pressure
• Measures fluid flow
• Filters contaminants

Rationale: Hydraulic accumulators store energy in a fluid under pressure

for later use.

• Which of the following is a common symptom of a failing bearing?
• Cold surface
• Smooth operation 3 / 4

• Unusual noise or vibration
• Reduced lubrication

Rationale: Bearings fail with symptoms like noise, vibration, or heat due to

friction or wear.

• What is the purpose of a fuse in an electrical circuit?
• Store energy
• Step up voltage
• Protect the circuit from overcurrent
• Conduct electricity continuously

Rationale: Fuses interrupt current flow when it exceeds a safe level,

preventing damage.

• When aligning a motor to a pump, which tool is most precise?
• Ruler
• Spirit level
• Dial indicator
• Measuring tape

Rationale: Dial indicators measure shaft alignment accurately, preventing

premature equipment wear.

• What is a common reason for hydraulic system overheating?
• Low pressure
• Excessive flow, contamination, or high fluid temperature
• / 4