MS CDL Combination Practice Test (2024)

1. To prevent a rollover, the driver should:

make quick lane changes if possible.
drive on the shoulder if possible.
pay extra attention to the coolant level.
drive slowly around corners, on ramps, and off ramps.

2. When you park trailers without spring brakes, you should use wheel chocks:

to prevent air from escaping.
to keep the trailer from moving.
to prevent overheating.
to prevent the transmission from shifting up.

3. The tractor protection valve:

controls the emergency brakes on combination vehicles.
works the trailer brakes.
keeps air in the tractor brake system should the trailer break away or develop a bad leak.
supplies air to the trailer air tanks.

4. It's very important to distribute the cargo so it is:

5. If you are being tailgated, you should:

speed up.
drive on the shoulder.
turn on your taillights.
try to let the other vehicle pass.

6. When you make a quick lane change, the crack-the-whip effect can:

turn the trailer over.
make it harder to turn without skidding.
the trailer to swing wide to the left.
improve your traction.

7. If your vehicle is equipped with air brakes, loss of air pressure in the emergency line will cause:

the vehicle to slide back and forth.
the trailer supply valve to open.
the trailer emergency brakes to come on.
the springs to put on the brakes.

8. A steering wheel should have no more than _____ of play. If there is more play than this, it may be hard to steer.

9. An Anti-lock Braking System (ABS):

keeps your wheels from locking up when you brake hard.
increases your normal braking capability.
lets you drive faster.
always shortens your stopping distance.

10. After the pre-trip inspection, drivers should inspect their cargo and its securing devices again within ________ after beginning the trip.

CDL COMBINATION PRACTICE TEST (MS)