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

How often should the tanks be drained?

Weekly

Every 48 hours

When a problem occurs

Daily

2 / 30

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

It warms the air coming from the supply tank

It helps to keep the air hoses flexible

It prevents the moisture from freezing in cold climate operation

None of these

3 / 30

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

Past the one-way check valve

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

Past the low-pressure indicators

To the air dryer

4 / 30

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

Nothing

A port

A flexible diaphragm

A metal wall

5 / 30

What happens if the safety valve has to relieve pressure?

The governor or compressor requires adjustment, service or repair

There is a leak with an air hose

The two-way valve needs adjustment

The brake chamber needs repair

6 / 30

What is another name for the supply reservoir?

Primary reservoir

Wet reservoir

Maximum reservoir

Main reservoir

7 / 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

A total brake failure

Parts of the brakes fall away

8 / 30

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

Spline

Slack adjuster

Worm gear

Worm shaft

9 / 30

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

3 minutes

2 minutes

5 minutes

4 minutes

10 / 30

What is meant by the loading stage?

When the system pressure reaches its minimum

When the air is being pushed through the air hoses

When the system pressure reaches its maximum

When the air is being added to the reservoir

11 / 30

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

None of these

They are spring loaded

The pedal is thicker

The are stiffer

12 / 30

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

The type of vehicle

The number of brake chambers and their size

The size of compressor

Whether the tractor will be towing trailers

13 / 30

What are the primary and secondary reservoirs also known as?

Dry reservoir

Wet reservoir

Minimal reservoir

Minor reservoir

14 / 30

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

If the governor has stopped

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

If the reservoir is full

If the two-way valve is closed

15 / 30

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

Front are smaller

Front are longer

Rear are longer

Rear are smaller

16 / 30

A brake chamber is usually mounted where?

By the differential

In the wheel hub

Above the wheel that is equipped for braking

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

17 / 30

What is the purpose of an air dryer?

To dry the brake pads

To reduce the amount of moisture in the system

To dry the brake drums

To dry the slack adjuster

18 / 30

What does a slack adjuster do?

It creates a slack when the brakes are malfunctioning

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

None of these

The lengthens the slack in the air hoses

19 / 30

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

None of these

Back into the tanks

Into the atmosphere

Into the brake chambers

20 / 30

What gets formed in the bottom of the supply reservoir?

Flakes

Nothing

Rust

Sludge

21 / 30

What is another name for an automatic reservoir drain valve?

Major drain valve

Master valve

Spitter valve

Drip valve

22 / 30

How id the push rod connected to the slack adjuster?

By a mounting bolt

By a lock screw

By a slack bolt

By a clevis and pin

23 / 30

What happens in the reservoir when the heated air cools?

The air expands

Nothing

The air shrinks

It forms condensation

24 / 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

25 / 30

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

It adds additional weight to the system

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

It slows down the forced air

It reduces the amount of compressed air allowable

26 / 30

What compresses the air in the cylinder?

None of these

The upward motion of the piston

The drive belts

The governor

27 / 30

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

The warning buzzer goes off

It reduces the effectiveness of the brake chamber

The vehicle quickly stops

A total loss of brakes

28 / 30

Where would an air dryer be installed?

Between the compressor and the wet reservoir

Below the foot valve

Next to the governor

Next to the two-way valve

29 / 30

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

Only if a warning light on the dashboard illuminates

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

Yes

30 / 30

A safety valve is normally set at what psi?

120 psi

170 psi

150 psi

135 psi

Your score is

Air Brake Practice Test 02

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