Certification Exam Practice Questions

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

• Which type of bearing is best suited for high-speed applications?
• Plain bearing
• Tapered roller bearing
• Ball bearing
• Sleeve bearing

Rationale: Ball bearings are ideal for high-speed applications due to

low friction and minimal heat generation.

• What is the primary purpose of a lockout/tagout procedure?
• Prevent electrical shorts
• Increase equipment efficiency 1 / 4

• Ensure worker safety during maintenance
• Reduce equipment downtime

Rationale: Lockout/tagout procedures prevent accidental

energization of machinery, protecting workers from injury.

• What is the unit of measure for torque?
• Newton (N)
• Joule (J)
• Newton-meter (Nm)
• Pascal (Pa)

Rationale: Torque is measured in Newton-meters, representing

rotational force applied at a distance.

• Which tool is used to measure the thickness of a material accurately?
• Caliper
• Ruler
• Micrometer
• Tape measure

Rationale: Micrometers provide precise measurements of small

thicknesses with high accuracy.

• A motor is rated 460V, 60Hz. If connected to a 230V supply, what will

happen?

• Runs at half speed
• Motor may fail to start or overheat
• Runs at normal speed 2 / 4

• Increases efficiency

Rationale: Supplying a lower voltage than rated may prevent the

motor from starting and can cause overheating.

• Which type of pump is best for handling high-viscosity liquids?
• Centrifugal pump
• Positive displacement pump
• Gear pump
• Jet pump

Rationale: Positive displacement pumps are designed to move

viscous fluids efficiently without losing flow rate.

• What does VFD stand for in industrial motors?
• Variable Force Drive
• Voltage Frequency Device
• Variable Frequency Drive
• Vertical Flow Drive

Rationale: VFDs control the speed of AC motors by varying frequency

and voltage.

• Which type of welding produces the least spatter?
• Stick welding
• TIG welding
• MIG welding
• Flux-core welding 3 / 4

Rationale: TIG welding offers precise control and minimal spatter due

to a clean shielding gas environment.

• What is the first step in troubleshooting a hydraulic system failure?
• Replace the pump
• Flush the system
• Check fluid levels and pressure
• Replace filters

Rationale: Verifying fluid levels and pressure helps identify common

problems before replacing components.

• Which gas is commonly used as a shield in MIG welding?
• Oxygen
• Hydrogen
• Argon
• Nitrogen

Rationale: Argon is an inert gas that shields the weld area from

contamination.

• What is the purpose of a flywheel on a machine?
• Reduce friction
• Control speed
• Store rotational energy
• Cool the motor

Rationale: Flywheels store energy and help smooth out fluctuations

in rotational motion.

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