Vermont CDL Air Brakes 2 - DMV Written Test Questions with Answers - MCQGeeks.com

Q.1

To make a stop in a vehicle equipped with air brakes, the driver should:

Press the brake pedal down.
Lift the brake pedal up.
Pull out the air brake knob.

Q.2

What should happen before the air pressure in an air brake system tank falls below 55 psi?

The warning light should activate.
The vehicle will be unable to shift out of gear.
The front lights should flash.

Q.3

In a dual air brake system, air pressure should build from 85 to 100 psi within ____ seconds.

25
10
45

Q.4

An alcohol evaporator is especially important:

In cold weather.
In hot weather.
In dry weather.

Q.5

Foundation brakes are used:

Only on the front wheels of a vehicle.
Only on the rear wheels of a vehicle.
On each wheel of a vehicle.

Q.6

Braking mechanisms are located inside:

The fifth wheel.
A brake drum.
The landing gear.

Q.7

Using an Anti-Lock Braking System (ABS):

Is required in some states.
Shortens brake response time.
Provides additional control.

Q.8

An Anti-Lock Braking System (ABS):

Is not available for vehicles with air brakes.
Is not helpful in most driving situations.
Can help you maintain control when braking.

Q.9

If the safety relief valve in the air brake system releases air:

The compressor needs more air.
There is something wrong with the brakes.
You may continue driving.

Q.10

If using spring brakes when hauling a heavy load, a complete stop will:

Be impossible.
Take a long time.
Take a short amount of time.

Q.11

The rods in S-cam brakes move the slack adjusters when air pressure is added to the brake chambers. This air pressure is added to the chambers when the driver:

Presses the brake pedal.
Uses the emergency brake.
Uses the trailer hand valve.

Q.12

A low air pressure warning signal:

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

Q.13

Having ABS on only one axle:

Can be dangerous.
Still allows you additional control when braking.
Slows the vehicle, but cannot stop it.

Q.14

The leakage rate for a single vehicle with air brakes should be no more than ____ in one minute during a static leakage test.

1 psi
2 psi
3 psi

Q.15

When parking, you should not use the parking brake if:

The brakes are very hot.
The brakes are very cold.
There is snow on the ground.

Q.16

Brakes can get out of adjustment quickly, especially:

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

Q.17

Air tank drains:

Should not be used in cold weather.
Are helpful to remove water and oil from the air tanks.
Are used to move air to the brakes.

Q.18

Alcohol evaporators are:

Illegal.
Used to introduce alcohol into air brake systems.
Only allowed in the northern parts of the state.

Q.19

A low air pressure warning signal should activate:

When tank pressure falls below 120 psi.
When tank pressure falls below 55 psi.
When tank pressure falls below 10 psi.

Q.20

Air tank drains should:

Only be used by mechanics.
Only be used when it is wet outside.
Be used to drain the tanks completely.

Q.21

What helps prevent wheel lockup when braking?

An Anti-Lock Braking System (ABS)
Air brakes
An alternator

Q.22

While driving, ____ generally holds spring brakes in place.

Air pressure
Electricity
Gasoline

Q.23

A dual air brake system:

Consists of two separate air brake systems that share a single set of controls.
Is a single air brake system with two different sets of controls.
Consists of one air brake system for the left side of the truck and one system for the right side of the truck, each with its own set of controls.

Q.24

If the low air pressure warning signal comes on, you should:

Continue driving, but have the brakes repaired within a week.
Pull over and inspect the brakes.
Phone a mechanic while driving.

Q.25

What kind of force do emergency brakes use?

Air pressure
Mechanical
Heavy

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