Home › CDL Practice Tests › Combination Vehicles Questions › Question 206
How do you check the service brakes, including the trailer's, right after starting a trip?
- A.Pull forward slowly (about 5 mph) on a safe, level area, apply the brakes firmly, and check that the vehicle stops evenly without pulling or unusual delay
- B.Make the first real brake test at highway speed in traffic
- C.Service brakes can only be checked on a dynamometer
- D.If the pedal feels hard in the yard, no moving test is needed
Correct answer
A. Pull forward slowly (about 5 mph) on a safe, level area, apply the brakes firmly, and check that the vehicle stops evenly without pulling or unusual delay
Why
A low-speed stop test proves every unit's brakes respond together before you need them for real. Pulling to one side, delay, or a weak stop found at 5 mph is a defect found cheaply.
Manual topic: Combination Vehicles - Trailer ABS · From the Combination Vehicles practice bank (CV-206).