92. Which shut off valves should be open and which closed?

Combination Vehiclesmedium

Aa. The front trailer's shut-off valve open and the rear closed.

Bb. The rear trailer's shut-off valve open and the front closed.

Cc. Both front and rear trailer shut-off valves open.

Detailed Explanation

The correct answer is "a. The front trailer's shut-off valve open and the rear closed.". This is based on federal CDL regulations and safety standards.

Correct Answer: a. The front trailer's shut-off valve open and the rear closed.

Ready to practice for real?

Take our free, full-length Combination Vehicles practice test. Simulates the actual DMV exam with timed questions.

Start Practice Test

92. Which shut off valves should be open and which closed?

Detailed Explanation

Ready to practice for real?

Related Questions

86. A tractor with a(n) _ trailer requires the shortest amount of stopping distance.

To test the trailer service brakes, you should:

During a trip, which shut-off valves should be open?

If you are operating a vehicle built before 1998 and are unsure if the trailer has an Anti-Lock Braking System (ABS), you can:

26. The air leakage rate for a combination vehicle (engine off, brakes off) should be no more than psi per minute. a. 2 b. 3 C, 4

92. Which shut off valves should be open and which closed?

Detailed Explanation

Ready to practice for real?

Related Questions

86. A tractor with a(n) _ trailer requires the shortest amount of stopping distance.

To test the trailer service brakes, you should:

During a trip, which shut-off valves should be open?

If you are operating a vehicle built before 1998 and are unsure if the trailer has an Anti-Lock Braking System (ABS), you can:

26. The air leakage rate for a combination vehicle (engine off, brakes off) should be no more than psi per minute. a. 2 b. 3 C, 4

26. The air leakage rate for a combination vehicle (engine off, brakes off) should be no more than psi per minute. a. 2 b. 3 C, 4