Questions appearing on this CDL practice test:
You should check the height of the trailer before connecting a converter dolly to a second or third trailer. The trailer height is right when:
The best way to stop all skids is to:
When does the drivers manual advise disconnecting the steering axle brakes to help keep the rig straight?
When driving with more than one trailer, which trailer should be the first one behind the tractor?
Driving a truck with double or triple trailers requires a driver to:
Which of these will result in the best control on curves?
You are driving a 100' vehicle with double trailers at 30 MPH. The road is dry, and visibility is good. You should keep at least _____ seconds of space ahead of you:
You are driving with double trailers and must use your brakes to avoid a crash. For emergency braking you should:
You are doing a walk around inspection of a double or triple trailer rig. You should be sure the converter dolly air tank drain valves are _____ and the pintle hook is _____.
A converter dolly is
If a converter dolly has spring brakes, you release the brakes by
You have connected the converter dolly to the front semitrailer and then connected the rear semitrailer to the converter dolly. How should you test the coupling?
To test the tractor protection valve, charge the trailer air brake system, turn off the engine, and
If your landing gear is power operated, you should check for ________ during your walk-around inspection.
Coupling a triple trailer is different from coupling other combinations because
The tractor protection valve is designed to close automatically when the air pressure falls into the pressure range specified by the manufacturer, typically
In order, the four steps to test your trailer's service brakes are as follows
If your test of the tractor protection valve is successful,
To uncouple the rear trailer, the first thing you do is
A converter dolly with antilock brakes (ABS) is required to have