BC Air Brake Practice Test 04

It is crucial to familiarize oneself with the inspection requirements and procedures, as well as the braking and stopping distances for different vehicles. Being knowledgeable in these areas will not only enhance one’s chances of passing the test but also contribute to a safer driving experience. So, with dedication and a comprehensive approach, obtaining a BC air brake endorsement will not be an insurmountable task.

BC Air Brake Test 04

1 / 30

With regards to the spring brakes, what should happen before making a heavy service brake application?

Slightly release the spring parking brakes after beginning applying the service brakes

Always release the spring parking brakes

None of the above

Brake as normal

2 / 30

Should the proper operation of the tractor protection system be checked regularly?

If requested by a peace officer

Yes

Only if a problem presents itself

3 / 30

What is the name of the coupling device used to connect and disconnect air lines from tractors and trailers?

Grey hands

Glue hands

Glad hands

Grand hands

4 / 30

Which reservoir does the two-way check valve use to supply the parking brake dash control with air?

Both primary and secondary reservoirs

Just the secondary

The main supply

Just the primary

5 / 30

What is a spring brake modulator?

It senses a loss of pressure in the primary system, and when the service brakes are applied

It moderates how much air pressure is required before it goes to the spring brakes

It divides the air pressure for each spring brake

It adds more air pressure to the spring brakes

6 / 30

A peace officer may place your vehicle out of service if the tractor protection system allows the tractor pressure to drop below how much psi?

30 psi

40 psi

20 psi

45 psi

7 / 30

What is another name for the supply line?

Emergency line

Feeder line

Master line

Nothing

8 / 30

What is the only major item of the air brake system not found on a trailer air system that is on the tractor's system?

Foundation brakes

Air chambers

Air compressor

Air reservoirs

9 / 30

Are hand valves spring-loaded, like the foot valve?

Only if the spring is added as an after-market addition

Yes, only if they are new

Yes

10 / 30

What is the air that is delivered from the two-way check valve is frequently called?

Nothing

Mainstream

Blended air

Premium air

11 / 30

How can you tell if you have reversed the supply line and service line connections?

The spring parking brakes release but the service brakes won't function properly

The trailer service brakes function as normal but with a jerky action

The gauge on the dashboard shows you

The spring parking brakes won't release even when you use the parking brake control on the dashboard

12 / 30

If all air is lost and the vehicle has to be towed, how can the spring brakes be released?

With the slack adjuster

Releasing by a socket wrench

The brakes can be caged

None of the above

13 / 30

Trailers that aren't equipped with spring parking brakes use a device called...

None of these

Response emergency adjuster

Emergency stopping valve

Relay emergency valve

14 / 30

Some tractor protection systems will shut off immediately in a breakaway, but some will do what?

Allow tractor pressure to drop to as low as 10 psi before shutting off

Allow tractor pressure to drop to as low as 5 psi before shutting off

Allow tractor pressure to drop to as low as 40 psi before shutting off

Allow tractor pressure to drop to as low as 20 psi before shutting off

15 / 30

What is it called when the relay emergency valve senses the trailer has broken away from the tractor and applies the trailer service brakes with full trailer reservoir pressure?

Exploding

Nothing

Dynamiting

Fusing

16 / 30

What is the purpose of the tractor protection system?

To prevent the tractor air from being depleted to an unsafe level

To prevent the brakes from overheating

Relay emergency valve

To prevent the trailer from disconnecting from the tractor

17 / 30

Can you use the hand valve should in normal or emergency situation braking?

Yes

Only during emergency situations

Yes, just for normal braking situations

18 / 30

When bobtailing, the braking pressure to the drive axle brakes is reduced by as much as...

75%

50%

60%

45%

19 / 30

What's the purpose of the supply line?

It supplies the trailer reservoirs with air at full tractor reservoir pressure

None of the above

It attaches to the foot valve

It brings air into the compressor

20 / 30

How many inlet ports does the two-way check valves have?

Three

Two

Four

One

21 / 30

What is the purpose of the control line?

It controls the pressure in the brake lines

It controls the dispersion of air

It fills the reservoirs with air

It carries the control signal from the tractor

22 / 30

What is the method used to check that the two-way check valve is working?

Adjust the brakes with the slack adjuster

Drain the primary reservoir and check that air pressure in the secondary reservoir doesn't bleed back into the primary reservoir

Check the warning lights

Monitor the air pressure gauges

23 / 30

Why should glad hands be fastened to dead-end (dummy) couplers or to each other when not in use?

To prevent dirt and debris from entering the air lines

To ensure they don't get damaged

To help keep the couplers lubricated

For easy access when you need them next

24 / 30

What should always be done after coupling the tractor to a trailer?

An air pressure test

A brake test

A block test

A tug test

25 / 30

What is another name for the control line?

Feeder line

Supply line

Service line

Master line

26 / 30

Spring parking brakes are mounted on which axles?

Drive axles

Trailer axles

Rear axles only

Steering axles

27 / 30

What's the purpose of a hand valve?

It allows independent control of the trailer brakes

It controls the governor

It controls the air compressor

None of the above

28 / 30

A bobtail tractor has very little weight over the rear drive axles, so it's very easy to lock up the rear brakes. What system is used to help prevent this?

A bobtail proportioning system

Anti-lock braking system

Hydraulic braking system

Nothing

29 / 30

When spring parking brakes are applied, how much force is applied to all of the brake components?

Up to 2,000 lbs

Up to 1700 lbs

Up to 1200 lbs

Up to 1500 lbs

30 / 30

Most trailer air supply valves are what shape and colour?

Octagon and red

Triangle and yellow

Square and green

Circle and orange

Your score is

BC Air Brake Practice Test 04

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