Air Brake Practice Test 02

By practicing with this test, you can identify any knowledge gaps and areas that require further study. Additionally, the test will provide you with a realistic simulation of the actual exam, which will help you to become familiar with the format and timing. With dedicated practice and focused study, you can confidently take your official air break exam and pass with flying colors. Remember, the key to success is consistent practice and preparation.

1 / 30

Do automatic reservoir drain valves still need to be checked daily?

Only if a warning light on the dashboard illuminates

Yes

Only if there is too much of a lag in the braking

2 / 30

How often should the tanks be drained?

Daily

When a problem occurs

Every 48 hours

Weekly

3 / 30

Where would an air dryer be installed?

Below the foot valve

Between the compressor and the wet reservoir

Next to the two-way valve

Next to the governor

4 / 30

The compressor must be able to build reservoir air pressure from 50 to 90 psi within how fast?

2 minutes

5 minutes

4 minutes

3 minutes

5 / 30

What's the purpose of the heater element in the purge valve?

It prevents the moisture from freezing in cold climate operation

It helps to keep the air hoses flexible

None of these

It warms the air coming from the supply tank

6 / 30

What does a safety valve do?

It protects the compressor from over-loading the system

It cuts off the governor when it begins to overwork

It protects reservoirs from becoming over pressurized and bursting if the governor malfunctioned and did not place the compressor in the unloading stage

It stops the air flow from the compressor to the supply tank

7 / 30

What happens in the reservoir when the heated air cools?

It forms condensation

Nothing

The air expands

The air shrinks

8 / 30

As the piston nears the top of the stroke, the pressurized air is forced where?

Past the one-way check valve

To the air dryer

Past the low-pressure indicators

Past the discharge valve and into the discharge line leading to the reservoir

9 / 30

What gets formed in the bottom of the supply reservoir?

Nothing

Flakes

Rust

Sludge

10 / 30

What is the purpose of an air dryer?

To dry the slack adjuster

To dry the brake pads

To reduce the amount of moisture in the system

To dry the brake drums

11 / 30

What does a slack adjuster do?

The lengthens the slack in the air hoses

It adjusts the 'slack' or free play in the linkage between the push rod and the brake shoes

None of these

It creates a slack when the brakes are malfunctioning

12 / 30

What is another name for the supply reservoir?

Wet reservoir

Maximum reservoir

Main reservoir

Primary reservoir

13 / 30

What are the primary and secondary reservoirs also known as?

Dry reservoir

Minimal reservoir

Wet reservoir

Minor reservoir

14 / 30

Why do air treadles provide a different feel from hydraulic brake applications?

The are stiffer

They are spring loaded

The pedal is thicker

None of these

15 / 30

What happens if the safety valve has to relieve pressure?

There is a leak with an air hose

The governor or compressor requires adjustment, service or repair

The brake chamber needs repair

The two-way valve needs adjustment

16 / 30

What happens if the slack adjusters are not adjusted within the limitations?

The brakes will grab and the vehicle stops abruptly

Effective braking is reduced and brake lag time is increased

Parts of the brakes fall away

A total brake failure

17 / 30

What would happen if sludge accumulated in the bottom of the tank?

It adds additional weight to the system

It reduces the amount of compressed air allowable

It could enter the braking system and could cause trouble with valves and other parts

It slows down the forced air

18 / 30

What's the difference between front brake chambers and rear brake chambers?

Rear are longer

Rear are smaller

Front are longer

Front are smaller

19 / 30

What is meant by the loading stage?

When the system pressure reaches its maximum

When the system pressure reaches its minimum

When the air is being added to the reservoir

When the air is being pushed through the air hoses

20 / 30

How id the push rod connected to the slack adjuster?

By a slack bolt

By a mounting bolt

By a lock screw

By a clevis and pin

21 / 30

What would stop a compressor to not be able to build air pressure rom 50 to 90 psi within three minutes?

If the air filter is plugged or if the belt is slipping

If the governor has stopped

If the reservoir is full

If the two-way valve is closed

22 / 30

A safety valve is normally set at what psi?

150 psi

170 psi

135 psi

120 psi

23 / 30

What is another name for an automatic reservoir drain valve?

Major drain valve

Master valve

Spitter valve

Drip valve

24 / 30

A brake chamber is a circular container divided in the middle by what?

Nothing

A flexible diaphragm

A port

A metal wall

25 / 30

The number and size of the reservoirs on a vehicle will depend on what?

The size of compressor

The type of vehicle

Whether the tractor will be towing trailers

The number of brake chambers and their size

26 / 30

When the driver releases the treadle where does the air get released to?

Into the atmosphere

Back into the tanks

None of these

Into the brake chambers

27 / 30

What compresses the air in the cylinder?

The drive belts

None of these

The governor

The upward motion of the piston

28 / 30

If a leak occurs in the diaphragm, air is allowed to escape causing what to happen?

The warning buzzer goes off

The vehicle quickly stops

A total loss of brakes

It reduces the effectiveness of the brake chamber

29 / 30

The push rod is connected to a crank arm-type lever called what?

Worm shaft

Slack adjuster

Spline

Worm gear

30 / 30

A brake chamber is usually mounted where?

On the axle, near the wheel that is to be equipped for braking

Above the wheel that is equipped for braking

By the differential

In the wheel hub

Your score is

Air Brake Practice Test 02

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