Flashcard 3 - Driving Test Flashcard Set for the CDL


The correct answer is:

All belts must be checked:

  • water pump
  • alternator
  • air compressor
  • power steering

Belt condition must be:

  • should be snug
  • up to 3/4” of play at center of belt
  • no cracks
  • no frays


If any of the above systems don’t use a belt (gear driven), you must:

  • tell the examiner that the system is not belt driven
  • check that the equipment is working properly (mounted correctly, not leaking, no missing bolts, etc.)

In most modern trucks, the air compressor and/or power steering pump are gear driven.
Each of these belts operates a major system within the vehicle; damage to one of the belts could cause an accident or system failure, resulting in injury or endangerment of other drivers.

All Flashcard Sets for the CDL are now available as downloadable PDFs