MASSACHUSETTS CDL COMBINATION PRACTICE TEST
11.
The best way to test the trailer service brakes is to:
|
put the handbrake on when there are no vehicles around you.
|
|
|
accelerate to the maximum possible speed, then apply the trailer brakes fully.
|
|
|
pull forward quickly, then apply the trailer brakes with your hand control.
|
|
|
None of the above.
|
12.
If the fifth-wheel locking lever is not locked after the jaws close around the kingpin:
|
the coupling is not right and you should not drive until you get it fixed.
|
|
|
cargo is properly blocked.
|
|
|
the parking brakes are on and your vehicle is safe to drive.
|
|
|
the parking brakes are on and the wheels are chocked.
|
13.
A red triangle with an orange center means:
|
Slow-moving vehicle
|
|
|
The vehicle is hauling hazardous materials
|
|
|
Liquid tanker
|
|
|
Law enforcement vehicle
|
14.
An Anti-lock Braking System (ABS):
|
increases your normal braking capability.
|
|
|
keeps your wheels from locking up when you brake hard.
|
|
|
lets you drive faster.
|
|
|
always shortens your stopping distance.
|
15.
When you have to back, you should always try to back toward the driver's side. Why?
|
Backing toward the left side is more dangerous.
|
|
|
You can watch the front of your vehicle by looking out the side window.
|
|
|
You can see better and watch the rear of your vehicle by looking out the side window.
|
|
|
All of the above.
|
16.
Foundation brakes are used:
|
at each wheel.
|
|
|
only with the right wheels.
|
|
|
only with the rear wheels.
|
|
|
only with the front wheels.
|
17.
If you are being tailgated, you should:
|
turn on your taillights.
|
|
|
speed up.
|
|
|
drive on the shoulder.
|
|
|
try to let the other vehicle pass.
|
18.
You are coupling a tractor to a semi-trailer. You have backed up but are not yet under the trailer. Before backing under the semi-trailer, you should:
|
remove the wheel chocks.
|
|
|
begin raising the landing gear.
|
|
|
supply air to the trailer system and lock the trailer brakes.
|
|
|
connect the electrical cord and check the air lines.
|
19.
When uncoupling, after you unlock the fifth-wheel you should:
|
ease the pressure on the locking jaws.
|
|
|
chock the trailer wheels.
|
|
|
pull the tractor partially clear of the trailer.
|
|
|
pull the tractor clear of the trailer.
|
20.
You are driving a heavy vehicle with a manual transmission, and you have to stop on the shoulder while driving on an uphill grade. When putting your vehicle back in motion up the grade, you should:
|
shift down to a speed that you can control without using the brakes.
|
|
|
use the parking brake to hold the vehicle until the clutch engages.
|
|
|
keep the clutch slipping while slowly accelerating.
|
|
|
partly engage the clutch before you take your right foot off the brake.
|
GRADE ME
NOT SURE YOU WILL PASS? GET CDL PREMIUM NOW! - Learn More