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?

None of the above

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

Brake as normal

Always release the spring parking brakes

2 / 30

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

The brakes can be caged

With the slack adjuster

None of the above

Releasing by a socket wrench

3 / 30

What is another name for the supply line?

Feeder line

Emergency line

Nothing

Master line

4 / 30

Most trailer air supply valves are what shape and colour?

Octagon and red

Triangle and yellow

Circle and orange

Square and green

5 / 30

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

The main supply

Just the primary

Both primary and secondary reservoirs

Just the secondary

6 / 30

Spring parking brakes are mounted on which axles?

Drive axles

Steering axles

Rear axles only

Trailer axles

7 / 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 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 10 psi before shutting off

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

8 / 30

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

Check the warning lights

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

Monitor the air pressure gauges

9 / 30

What is the purpose of the control line?

It fills the reservoirs with air

It controls the pressure in the brake lines

It carries the control signal from the tractor

It controls the dispersion of air

10 / 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

11 / 30

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

Yes, just for normal braking situations

Only during emergency situations

Yes

12 / 30

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

For easy access when you need them next

To prevent dirt and debris from entering the air lines

To ensure they don't get damaged

To help keep the couplers lubricated

13 / 30

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

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

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

The gauge on the dashboard shows you

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

14 / 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

45 psi

20 psi

40 psi

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?

Nothing

Dynamiting

Fusing

Exploding

16 / 30

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

Grey hands

Grand hands

Glad hands

Glue hands

17 / 30

What's the purpose of a hand valve?

It controls the governor

None of the above

It controls the air compressor

It allows independent control of the trailer brakes

18 / 30

What is the purpose of the tractor protection system?

To prevent the trailer from disconnecting from the tractor

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

To prevent the brakes from overheating

Relay emergency valve

19 / 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?

Air compressor

Air reservoirs

Air chambers

Foundation brakes

20 / 30

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

A tug test

A block test

An air pressure test

A brake test

21 / 30

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

Yes, only if they are new

Yes

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

22 / 30

What's the purpose of the supply line?

It brings air into the compressor

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

None of the above

It attaches to the foot valve

23 / 30

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

Up to 1700 lbs

Up to 1200 lbs

Up to 2,000 lbs

Up to 1500 lbs

24 / 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

25 / 30

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

One

Two

Three

Four

26 / 30

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

Premium air

Blended air

Nothing

Mainstream

27 / 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?

Hydraulic braking system

Nothing

A bobtail proportioning system

Anti-lock braking system

28 / 30

What is another name for the control line?

Supply line

Feeder line

Master line

Service line

29 / 30

What is a spring brake modulator?

It adds more air pressure to the spring brakes

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

30 / 30

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

45%

60%

75%

50%

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BC Air Brake Practice Test 04

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