MANITOBA AIR BRAKE PRACTICE TEST 04

Air brakes are an essential component of any commercial vehicle operating in Manitoba, Canada. These brakes operate using compressed air to apply pressure to the brake pads, thus bringing the vehicle to a stop.

Air Brake Test 04

1 / 30

On spring operated parking brakes, during normal operation, air pressure _________ the spring, holding it ready for parking or emergency braking.

Applies

Coils

Cages

Decompresses

2 / 30

Ultimately, it is the _______ responsibility to ensure that brakes are adjusted correctly.

Technician's

Mechanic's

Driver's

Owner's

3 / 30

On spring brake systems, during full brake application, compounding of the force applied on the slack adjusters and linkage can be said to be a combination of two forces: the force applied by the _________ and the _________.

Spring brakes, compressor

Service brakes, mounting bolts

Spring brakes, service brakes

Clevis, pin

4 / 30

Which of the following is considered the 'brain' of an anti-lock braking system?

Tooth wheel

Wheel sensor

ABS valves

Electronic control unit

5 / 30

For a vehicle to move along the highway, an internal combustion engine must convert its _____ energy into ______ energy.

Friction, Heat

Mechanical, heat

Motion, mechanical

Heat, mechanical

6 / 30

What is a reason a medium sized vehicle would use air over hydraulic brakes?

Increase stopping distance

It gives the option of pulling an air brake equipped trailer.

Gain a mechanical advantage

Decrease the vehicle weight

7 / 30

The _______ adjusts the free play in the linkage between the push rod and the brake shoes.

Clevis and pin

Slack adjuster

Push rod

S-cam

8 / 30

Friction produces what?

Air pressure

Convection

Heat

Lubrication

9 / 30

Which of the following is NOT a component of a spring parking brake system?

Front and rear service reservoirs

Relay valve

Trailer spring parking brake valve

Compressor

10 / 30

A vehicle carrying a load of 20,000 kg at 20 km/h is brought to a stop in 45 metres with normal application of the brakes. If this same vehicle carried 40,000 kg at 40 km/h, it would require ____ times the braking force to stop the vehicle in 45 metres.

Ten

Two

Eight

Four

11 / 30

What will a tractor protection valve with a broken return spring cause?

The brake drum to crack or warp.

Brake fade

An emergency brake application on the trailer until a brake application was made

Loss of air during normal brake applications if operating the tractor without a trailer.

12 / 30

A brake chamber is a circular container divided in the middle by a flexible ________.

Diaphragm

Push rod

Slack adjuster

Mounting bolt

13 / 30

On a combination vehicle, what is the first step in a tractor protection valve check?

Disconnect control (service) line glad hand

Release the spring parking brake

Make full brake application

Disconnect supply (emergency) line glad hand

14 / 30

Braking distance is defined as:

The actual distance the vehicle travels after the brake is applied until the vehicle stops

The time it takes from the moment a hazard is recognized to the time the brake is applied,

A combination of driver's reaction time, brake lag, and stopping distance

The time it takes the air to travel through a properly maintained air brake system

15 / 30

The amount of force available at the push rod is consistent out to ____ inches of stroke.

Three

Four

Two

One

16 / 30

What methods can the driver use to stay aware of the condition of the vehicle's braking system?

All of these

Feeling the brake response of the vehicle

Watching the gauges

Listening for warning signals

17 / 30

The ________ of the drum brakes determines the amount of _____ they are able to absorb and dissipate into the atmosphere.

Width, friction

Diameter, friction

Strength, force

Thickness, heat

18 / 30

At a truck stop before a downgrade, what needs to be checked before continuing to drive?

That the push rod travel is within limitations on all chambers

All of these

That the trailer supply valve is operating properly

That the glad hands and the lines are secure

19 / 30

The electronic engine control is activated automatically by the ATC if all the wheels begin to slip. What effect does this have?

Causes the limiting valve to operate

Engine power is reduced

Brakes applied and released up to five times a second

Air from the trailer reservoir released to the brake chambers.

20 / 30

A relay valve has two uses. Which of the following is one of them?

Release the brakes quicker when a brake application is released.

Discharging the application air near the brake chambers

Connecting the control (service) and supply (emergency) lines of the trailer to the tractor

Reducing the braking effort to the front wheels

21 / 30

Which of the following is NOT true about automatic traction control?

Monitors wheel speed at all times and controls wheel speed while braking

The system uses two functions: differential braking and electronic engine control

Uses controlled braking to gain traction

Improves the ability of the driver to manoeuvre the vehicle on slippery surfaces

22 / 30

What absorbs the heat produced by friction?

Treadle

Brake lining

Metal brake drums

Diaphragm

23 / 30

What are the two most common slack adjuster problems?

Seized shoe anchors, lining wear

Excessive premature wear and internal contamination.

Lining wear, excessive moisture

Oversize drums, internal contamination

24 / 30

Air that is squeezed into a much smaller space than it normally would occupy is said to be ________.

Caged

Compressed

Canned

Contained

25 / 30

Normally on an S-cam brake with automatic slack adjustment, ________ brake applications of ________ psi per day will keep the brakes properly adjusted.

Three to five, 40-70

One, 100-120

Two to four, 80-100

Two, 80-100

26 / 30

Which of the following is NOT a component of an air brake system?

A compressor

A foot valve

A governor

Spring parking brake chambers

27 / 30

What is the best way to avoid major breakdowns?

Verifying the system is at full pressure

Preventative maintenance

Watching the dash gauges

Listening for audible air leaks

28 / 30

What does a kPa stand for?

Kilogram

Kilometre

Kilopascal

Pressure per square inch

29 / 30

What is the function of a 'spitter' valve on a reservoir?

Transmits force in an air brake system

Automatically exhausts moisture from the reservoir when required

Allows the air to flow in one direction only

Holds a supply of compressed air

30 / 30

The ________ the air supply is kept, the ______ chance of brake problems.

Cleaner, less

Warmer, less

Colder, less

More compressed, less

Your score is

In Manitoba, drivers must pass an air brake test before obtaining a commercial driver’s license. This test ensures that drivers understand how to properly operate and maintain air brake systems, which is crucial for their safety and the safety of others on the road. Additionally, Manitoba requires annual air brake inspections to ensure all commercial vehicles have functioning air brakes. These inspections help prevent accidents caused by faulty braking systems. Overall, air brakes are a vital aspect of commercial vehicle operation in Manitoba, and they play a critical role in keeping the province’s roads safe and secure for everyone.

Drivingtest.ca has prepared this Air Brake practice test to assist drivers in understanding an air brake system’s essential operation and function. Requirements for Air Brake Endorsement are:

1) Must complete an Air Brake Written Test

2) Must complete an Air Brake Practical Test.

This endorsement permits the holder to drive vehicles equipped with air brakes in the vehicle class for which the driver is licensed.

To successfully prepare, consider utilizing these exams and the official Manitoba Air Brake Manual to your advantage. The more knowledge you can attain, the better it will be for you once you return to the MPI office to take the air brake license written knowledge test.