Are used to drain water and compressor oil from the air tank.

Allow rain water to enter the tank.

Must remain open during transit.

Are more likely to roll over than empty rigs.

Are less likely to roll over than empty rigs.

Are just as likely to roll over as empty rigs.

Indiana CDL Double 1 - DMV Written Test Questions with Answers

Q.1

How does doubling your speed from 20 mph to 40 mph affect your vehicle's braking distance?

It stays about the same.
It increases slightly.
It doubles.
It quadruples.

Q.2

Rollovers happen when:

A truck driver is driving too fast.
The driver of a vehicle in front of a truck is moving to slowly.
A truck driver is driving too slowly.
ABS is working effectively.

Q.3

What is the minimum permitted size of a placard?

Four square inches
Seven square inches
10 ¾ square inches
32 square inches

Q.4

Air tank drains:

Allow rain water to enter the tank.
Are used to drain water and compressor oil from the air tank.
Should never be opened.
Must remain open during transit.

Q.5

When other vehicles have trouble seeing you at dawn or dusk, you can increase your visibility by:

Turning on your four-way flashers.
Honking your horn.
Turning on your headlights.
Turning on your windshield wipers.

Q.6

To confirm that a trailer has ABS, you can:

Look under the trailer for wheel speed sensors coming from the back of the brakes.
Look under the hood for the ABS sticker.
Look at the tires.
Remove a tire and look for the ABS sensor on the axle.

Q.7

When using road speed to know when to switch gears, you should:

Learn what speeds each gear is good for and shift up when necessary.
Watch other vehicles and try to keep pace.
Watch other trucks and shift when they shift.
Use the speed limit as a guide.

Q.8

When uncoupling a dolly, you should:

Unlock the pintle hook before moving the dolly out from under the rear trailer.
Move the dolly out from under the rear trailer before unlocking the pintle hook.
Raise the dolly landing gear.
Remove the dolly as quickly as possible.

Q.9

A driver should always:

Stay in the right lane.
Have an emergency plan.
Stay in the left lane.
Drive faster than the posted speed limit.

Q.10

When backing, it is best to:

Rely only on the passenger’s side mirror.
Try to back up quickly.
Turn toward the passenger’s side whenever possible.
Use a helper, if possible.

Q.11

Which of the following is not a problem?

Loose or broken exhaust pipes
Loose or broken mounting brackets
Exhaust parts rubbing against fuel system parts
Exhaust system parts that are not leaking

Q.12

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.13

What is another name for the service line?

Control line
Exchange line
Surplus line
Parallel line

Q.14

When doing an inspection, make sure your brake pads are:

Covered in grease.
Covered in coolant.
Covered in oil.
Free of oil and grease.

Q.15

The parking brake should be:

Used whenever you park your vehicle.
Used while driving.
Set when driving in bad weather.
Removed.

Q.16

Fully-loaded rigs:

Are less likely to roll over than empty rigs.
Are more likely to roll over than empty rigs.
Are just as likely to roll over as empty rigs.
Should not be driven.

Q.17

You must put out emergency warning devices within ____ of stopping on the side of the road.

One minute
10 minutes
45 minutes
Two hours

Q.18

When checking your mirrors:

Do not use the passenger side mirror.
Do not use the driver's side mirror.
Both mirrors should be used.
Look in each mirror for long stretches of time.

Q.19

If involved in a crash, basic procedures should include all of the following, except:

Protecting the area.
Notifying the proper authorities.
Caring for the injured.
Driving away without stopping.

Q.20

Which of the following types of vehicles is most prone to the “crack-the-whip" effect?

An automobile
A three-axle tractor
A bobtail tractor
A triple combination