Massachusetts CDL Practice Test 2026

Practice question bank

Sample questions

1. Friction inside a brake drum is caused when the brake shoes and linings:

   • Push against each other.
   • Separate from the axle.
   • Push against the inside of the drum. ✓
   • Create excess heat.

   Vehicle Equipment & Safe Operation · Answer: C · Official handbook: Texas Commercial Driver License Handbook (DL-7C), Section 5 – Air Brakes, p. 82

2. If you don't know if there is enough space for your vehicle to pass under a bridge, you should:

   • Speed up.
   • Swerve back and forth.
   • Slow down. ✓
   • Drive on the shoulder.

   General Driving Knowledge · Answer: C · Official handbook: Texas Commercial Driver License Handbook (DL-7C), Section 2 – Driving Safely, p. 45

3. If your vehicle is hydroplaning, you should:

   • Speed up.
   • Not apply the brakes. ✓
   • Put the vehicle in reverse.
   • Turn the steering wheel as hard as possible.

   Bad Weather & Night Driving · Answer: B · Official handbook: mass.gov

4. Loading and unloading a school bus:

   • Can be hazardous for passengers. ✓
   • Does not need to be supervised.
   • Should be done when refueling.
   • Can be done with the driver talking to another driver.

   Sharing the Road · Answer: A · Official handbook: Texas Commercial Driver License Handbook (DL-7C), Section 10 – School Buses, p. 137

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