Can occur at speeds as low as 30 mph.

Only occurs at extremely high speeds.

Happens most frequently when tire pressure is too high.

More dangerous than driving during the day.

Safer than driving during the day.

Just as safe as driving during the day.

Connecticut CDL Double 1 - DMV Written Test Questions with Answers

Q.1

What is Gross Combination Weight?

The total weight of the powered unit, trailer, and cargo
The total weight of a single vehicle without its load
The maximum weight allowed by the manufacturer

Q.2

Maintaining a cushion of space between your vehicle and the vehicle ahead is:

Not encouraged, as it slows the flow of traffic.
Encouraged, as it allows you time to react to unexpected hazards.
Only encouraged if you are traveling with a passenger.

Q.3

If feeling sleepy while driving, you should:

Press on and finish the trip.
Drive faster to arrive to your destination sooner.
Leave the road and take a nap.
Take an energy pill.

Q.4

Brakes can get out of adjustment quickly, especially:

If they are hot.
In the winter time.
If they are used frequently.

Q.5

During an applied leakage test, the maximum leakage rate for a triple combination vehicle is:

10 psi in a minute.
8 psi in a minute.
6 psi in a minute.
4 psi in a minute.

Q.6

Some water and compressor oil is usually found in the compressed air within an air brake system. The water and compressor oil:

Are necessary for the proper function of the system.
Should take up about 10 percent of the tank.
Should be removed regularly.

Q.7

Rollovers happen when:

Drivers turn too quickly.
Drivers turn too slowly.
It is raining.

Q.8

Hydroplaning:

Only occurs at extremely high speeds.
Can occur at speeds as low as 30 mph.
Happens most frequently when tire pressure is too high.

Q.9

When should mirror adjustments be made?

Before starting a trip
While driving
When a vehicle is stopped at a traffic signal

Q.10

What is a way to warn drivers behind you that you will be slowing down?

Turn on the right turn signal followed by the left turn signal.
Tap your brake pedal a few times to illuminate the brake lights.
Swerve from side to side to get other drivers’ attention.
Turn all lights on and off several times.

Q.11

Pull out the trailer air supply control to test:

The trailer emergency brakes.
The Anti-Lock Braking System.
The wheel chocks.

Q.12

When starting the engine of a truck with a trailer, you can tell that your vehicle's ABS is not working if:

The yellow light on the left rear of the trailer stays on.
The red light on the right side of the trailer flashes three times.
All the rear lights flash and then turn off.

Q.13

If planning to change lanes, your mirrors should:

Not be checked.
Be checked as usual.
Be checked more often than usual.

Q.14

Once cargo is secured:

You may complete an entire trip without checking it.
You can drive at least eight hours without checking it.
You should check it every three hours or 150 miles.
You should not check it.

Q.15

Driving at night is:

Safer than driving during the day.
Just as safe as driving during the day.
More dangerous than driving during the day.

Q.16

If braking at a speed of 55 mph while driving on dry pavement, the brake lag can add ____ to your vehicle's total stopping distance.

32 feet
15 feet
50 feet
10 feet

Q.17

During a static leakage test, the maximum leakage rate for a triple combination vehicle with air brakes is ____ in a minute.

3 psi
5 psi
7 psi
9 psi

Q.18

Vehicles equipped with Anti-Lock Braking Systems (ABS) have ____ malfunction lamps to indicate when the ABS is not working.

Green
Blue
Yellow

Q.19

A low air pressure warning signal:

Is not required on vehicles with air brakes.
Is required on vehicles with air brakes.
Is optional on vehicles with air brakes.

Q.20

When should mirrors be adjusted?

Before driving
While driving
After driving