Q
25. The hand valve should be used:
Combination Vehiclesmedium
ATo test the trailer brakes.
BOnly when the trailer is fully loaded.
COnly with the foot brake.
Detailed Explanation
The correct answer is "To test the trailer brakes.". This is based on federal CDL regulations and safety standards.
Correct Answer: To test the trailer brakes.
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
When entering or crossing traffic while driving a combination vehicle, it is especially important that you:
combination-vehicleseasy
67. You are uncoupling a trailer. After you shut off the trailer air supply and lock the trailer brakes, you should:
combination-vehiclesmedium
When glad hands are coupled, the seals should be pressed together at an angle of:
combination-vehicleseasy
When a combination vehicle goes around a corner:
combination-vehicleseasy
In a double or triple combination:
combination-vehiclesmedium