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Engine/Cab Inspection (All Vehicles)

Study the following vehicle parts for the type of vehicle you will be using during the CDL skills/drive testing. You should be able to identify each part and tell the examiner what you are looking for or inspecting.

Engine Compartment (Engine Off) Leaks/Hoses

  • Look for puddles on the ground.
  • Look for dripping fluids on underside of engine and transmission.
  • Inspect hoses for condition and leaks.

Oil Level

  • Indicate where dipstick is located.
  • See that oil level is within safe operating range. Level must be above refill mark.

Coolant Level

  • Inspect reservoir sight glass, or
  • If engine is not hot, remove radiator cap and check for visible coolant level.

Power Steering Fluid

  • Indicate where power steering fluid dipstick is located.
  • Check for adequate power steering fluid level. Level must be above refill mark.

Engine Compartment Belts

Check the following belts for snugness (up to 1/4-inch play at center of belt), cracks or frays:

  • Power steering belt.
  • Water pump belt.
  • Alternator belt.
  • Air compressor belt.

Note: If any of the components listed above are not belt driven, you must:

  • Tell the examiner which component(s) are not belt driven.
  • Make sure component(s) are operating properly, are not damaged or leaking and are mounted securely.

Safe Start

  • Depress clutch.
  • Place gearshift lever in “Neutral” (or “Park,” for automatic transmissions).
  • Start engine and then release clutch slowly.

Multiple-Choice Questions:

Question #503 (1 of 2)

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When doing a pre-trip inspection of the engine compartment, which of the following are you NOT looking for?

  • Look for dripping fluids on the underside of the engine and transmission.
  • Inspect hoses for condition and leaks.
  • Look for puddles on the ground.
  • Make sure the air lines are properly attached to the trailer

Engine Compartment (Engine Off) Leaks/Hoses

  • Look for puddles on the ground.
  • Look for dripping fluids on underside of engine and transmission.
  • Inspect hoses for condition and leaks.
The air lines do not connect to the trailer inside the engine compartment.
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Question #504 (2 of 2)

Give a brief explanation of the problem:

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Which of the following is NOT one of the belts you will check during a pre-trip inspection of the engine compartment?

  • Camshaft belt
  • Power steering belt
  • Water pump belt
  • Alternator belt

Check the following belts for snugness (up to 1/4-inch play at center of belt), cracks or frays:

  • Power steering belt.
  • Water pump belt.
  • Alternator belt.
  • Air compressor belt.
The camshaft is inside the engine and does not have a belt you can see or check.
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