IA CDL COMBINATION PRACTICE TEST
11.
If you try to couple when the trailer is too low:
|
the tractor could roll away.
|
|
|
the tractor may strike and damage the trailer nose.
|
|
|
it might not couple correctly.
|
12.
Hanging meat in a refrigerated truck can be:
|
a very stable load if properly distributed.
|
|
|
a very unstable load with a low center of gravity.
|
|
|
a very unstable load with a high center of gravity.
|
13.
When backing a tractor under a trailer, you should:
|
stop before when the kingpin is locked into the fifth wheel.
|
|
|
back at an angle.
|
|
|
always use the lowest reverse gear.
|
14.
When checking air brakes on combination vehicles, which of the following is NOT part of checking that air flows to all trailers?
|
Going to the rear of the rig.
|
|
|
Pulling tractor forward until the fifth-wheel comes out from under the trailer.
|
|
|
Using the trailer handbrake to provide air to the service line.
|
15.
If an aggressive driver is involved in an accident down the road, you should:
|
confront the aggressive driver.
|
|
|
stop a safe distance from the accident scene, wait for the police and report the behavior you witnessed.
|
|
|
try to get their vehicle to the side of the road.
|
16.
_________ can make vehicle handling unsafe.
|
Dry roads
|
|
|
Poor ventilation
|
|
|
Poor weight balance
|
17.
When you are driving on a slippery road, you should NOT:
|
adjust turning and braking to road conditions.
|
|
|
use the engine brake or speed retarder.
|
|
|
keep a longer following distance.
|
18.
In a vehicle with a dual air brake system:
|
each system has its own air tanks.
|
|
|
both systems typically operate the regular brakes on the rear axle.
|
|
|
one system supplies air to the trailer.
|
19.
If are being followed closely, you should:
|
decrease your following distance.
|
|
|
increase your following distance.
|
|
|
change lanes quickly.
|
20.
If the fifth-wheel locking lever is not locked after the jaws close around the kingpin:
|
the parking brakes are on and your vehicle is safe to drive.
|
|
|
the parking brakes are on and the wheels are chocked.
|
|
|
the coupling is not right and you should not drive until you get it fixed.
|
GRADE ME
NOT SURE YOU WILL PASS? GET CDL PREMIUM NOW! - Learn More