NM CDL DOUBLES TRIPLES PRACTICE TEST
11.
To test your parking brake, do the following:
|
Speed up to 5 mph, then set the parking brake.
|
|
|
Set the parking brake while going downhill.
|
|
|
Set the parking brake, and gently pull against it in a low gear.
|
12.
When more cargo is piled up in a truck, the center of gravity moves:
|
to the left side of the truck.
|
|
|
closer to the ground.
|
|
|
higher up from the road.
|
13.
Watch out for black ice:
|
when the temperature is above freezing and the road is dry.
|
|
|
when it is snowing.
|
|
|
any time the temperature is below freezing and the road looks wet.
|
14.
What factors can cause brakes to fade?
|
Slippery surfaces and shaded areas.
|
|
|
Dirt roads and in unpaved yards.
|
|
|
Excessive heat and brakes out of adjustment.
|
15.
Having ABS on only the trailer:
|
still gives you more control over your vehicle during braking.
|
|
|
makes the trailer more likely to swing out.
|
|
|
is very dangerous.
|
16.
The tractor protection valve:
|
supplies air to the trailer air tanks.
|
|
|
controls the emergency brakes on combination vehicles.
|
|
|
keeps air in the tractor brake system should the trailer break away or develop a bad leak.
|
17.
A trailer jackknife is more likely to happen when the trailer is:
|
loaded to its full capacity.
|
|
|
empty.
|
|
|
overloaded.
|
18.
To start moving without rolling back, you should:
|
put on the parking brake whenever necessary.
|
|
|
partly engage the clutch before you take your right foot off the brake.
|
|
|
All of the above.
|
19.
When inspecting the coupling, how much space should there be between the upper and the lower fifth-wheel?
|
None.
|
|
|
It depends on the trailer
|
|
|
½ inch
|
20.
Texting while operating a commercial motor vehicle is:
|
acceptable if you are contacting your supervisor.
|
|
|
acceptable if you are contacting your dispacther.
|
|
|
illegal.
|
GRADE ME
NOT SURE YOU WILL PASS? GET CDL PREMIUM NOW! - Learn More