Q
A shut-off valve:
Combination Vehiclesmedium
AControls the vehicle's speed
BPrevents air from escaping an air brake system
CRegulates fuel intake
Detailed Explanation
The correct answer is "Prevents air from escaping an air brake system". This is based on federal CDL regulations and safety standards.
Correct Answer: Prevents air from escaping an air brake system
Advertisement
Ready to practice for real?
Take our free, full-length Combination Vehicles practice test. Simulates the actual DMV exam with timed questions.
Start Practice TestRelated Questions
An air supply control in its 'emergency' position will:
combination-vehiclesmedium
81. When a vehicle is carrying a load at night, which extends four feet or more beyond the rear of the body, there must be __ at the extreme end of the load.
combination-vehiclesmedium
19. When backing under a tractor under a trailer you should expect:
combination-vehiclesmedium
An air supply control lever should be in its 'normal' position when you are:
combination-vehiclesmedium
To test the trailer service brakes, you should:
combination-vehiclesmedium
Advertisement