COMBINATION TEST CONNECTICUT - PRACTICE TEST
11.
Emergency lines on combination vehicles are often coded with the color ____ to keep from getting them mixed up with the ____ service line.
|
blue; red
|
|
|
yellow; black
|
|
|
red; blue
|
|
|
red; yellow
|
12.
The service line is also called:
|
carrier line or control line.
|
|
|
pressure line or signal line.
|
|
|
signal line or air line.
|
|
|
control line or signal line.
|
13.
One way to prevent hydroplaning is to:
|
use the controlled braking method.
|
|
|
make sure you have enough tread on your tires.
|
|
|
take curves at higher speeds.
|
|
|
have less than 4/32 inch tread depth in every major groove on front tires.
|
14.
If you have convex mirrors, be aware that:
|
in a convex mirror objects appears larger than they really are.
|
|
|
everything appears smaller in a convex mirror than it would if you were looking at it directly.
|
|
|
objects seem closer than they really are.
|
|
|
objects may appear to be faster than they really are.
|
15.
On
a tractor-trailer equipped with a trailer brake hand
valve, the hand valve can be used to:
|
keep from rolling back.
|
|
|
reduce the chance of the front wheels skidding.
|
|
|
prevent movement of cargo.
|
|
|
hold compressed air.
|
16.
The use of brakes on a steep downgrade is:
|
the main braking factor.
|
|
|
a supplement to the braking effect of the engine.
|
|
|
much more effective than the engine braking effect.
|
|
|
dangerous, and should be avoided at all costs.
|
17.
In combination vehicles with air brakes, the trailer air supply control:
|
is a coupling devices used to connect the service and emergency air-lines from the tractor to the trailer.
|
|
|
supplies air to the trailer air tanks.
|
|
|
is used to control the tractor protection valve.
|
|
|
is used to keep the trailer behind the tractor.
|
18.
ABS will:
|
not change your normal braking capability.
|
|
|
not give you more control over the vehicle during braking.
|
|
|
shorten your stopping distance.
|
|
|
increase your average speed.
|
19.
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:
|
supply air to the trailer system and lock the trailer brakes.
|
|
|
begin raising the landing gear.
|
|
|
connect the electrical cord and check the air lines.
|
|
|
remove the wheel chocks.
|
20.
How can you tell if a converter dollie has ABS?
|
There is a red lamp on the left side of the dolly.
|
|
|
There is an ABS plaque on the right side of the dolly.
|
|
|
There is an ABS system on the right side of the dolly.
|
|
|
There is a yellow lamp on the left side of the dolly.
|
GRADE ME
NOT SURE YOU WILL PASS? GET CDL PREMIUM NOW! - Learn More