BC Air Brake Practice Test 07

Taking the BC air brake practice test is a crucial step towards obtaining your commercial driver’s license. It provides an opportunity to familiarize yourself with the format and content of the official exam. By taking the practice test multiple times, you can assess your strengths and weaknesses and focus your studying accordingly. When the time comes to take the official exam, it is essential to remain calm and confident.

BC Air Brake Test 07

1 / 30

Once you know the proper direction, why do you continue turning until solid resistance is met?

It indicates that the brake linings have contacted the brake drum

It indicates that the pushrod is at the maximum depth

To know you're half way through the adjustment

To know you're done

2 / 30

When adjusting the brakes, what should the air system be?

80% pressure

75% pressure

50% pressure

Full pressure

3 / 30

What happens if the brakes on one or the other axle have been mistakenly backed off?

Nothing serious happens

It's tough to remove the wrench

A warning light shows on the dash

It creates a serious safety hazard

4 / 30

Would the s-cam brakes seem to be effective when the brake drum is cool and with normal brake application pressure?

In wet weather

Only at slow speeds

Yes

5 / 30

Which statement is false? While checking air brakes look for other brake component wear and excessive play including...

S-cam spline wear

S-cam bushing wear

Thread wear

Clevis pin wear

6 / 30

When you turn the adjusting bolt, why are you watching the end of the camshaft?

It should rotate slightly as the bolt is being turned

It should remain tight as the bolt is being turned

It should become loose

None of the above

7 / 30

When using the pry method of free stroke measurement, when would the brakes need adjustment?

If the distance is more than 1 1/2 of an inch

If the distance is more than 1/4 of an inch

If the distance is more than 3/4 of an inch

If the distance is more than 1 1/4 of an inch

8 / 30

How would you know if the adjusting bolt is being turned in the wrong direction?

The adjusting bolt is too tough to move

The adjusting bolt is too loose to move

None of the above

If the slack adjuster is pulling the pushrod out of the chamber when you turn the adjusting bolt

9 / 30

Which statement is false? Make sure you have the proper equipment to check the brakes, including...

Chalk or other marker, and a ruler or other marking device, to check pushrod free stroke

A flashlight to inspect components

Lubricant

A tool to pry on the air brake chamber pushrod to check for free stroke

10 / 30

What is done with a spring-loaded locking sleeve on most manual slack adjusters?

Pull it out and turn it counter clockwise

Pull it out and turn it clockwise

Pull it out so the adjusting bolt can be turned

Press it in and hold it so the adjusting bolt can be turned

11 / 30

To perform a leak test, hold a firm brake application for 1 minute, you cannot lose any more then how many psi?

9 psi

7 psi

5 psi

3 psi

12 / 30

Do air-brake-equipped vehicles lose their brakes?

Rarely

Once every 1500 km traveled

Once every 500 km traveled

Once a month

13 / 30

Once the leak test is completed, how much air pressure as a minimum should you confirm there is in the reservoirs?

80 psi

100 psi

70 psi

90 psi

14 / 30

Can s-cam brakes be adjusted very accurately with the wheels on the ground?

Yes

Just the trailer brakes can

Just the tractor brakes can

15 / 30

What is meant by pushrod travel?

The distance the pushrod extends from the air brake chamber when the brakes are released

The measurement from one end of the pushrod to the other

The distance the pushrod extends from the air brake chamber when the brakes are applied

The diameter of the pushrod

16 / 30

Is it common, especially on tandem axle units, for the adjusting bolts on one axle to adjust in one direction, while the other axle requires an opposite turn?

Yes

On older vehicles only

On new vehicles only

17 / 30

When using the pry method of free stroke measurement, what psi should the air system be?

Less than 60 psi

Less than 100 psi

Over 100 psi

Between 60 and 90 psi

18 / 30

What size wrench is typically used to turn the adjusting bolt?

3/4 inch

9/16 inch

1/2 inch

3/8 inch

19 / 30

Should each brake on an axle be adjusted to have a similar amount of pushrod travel?

They can be quite off, but as long as they work

They are all separate

Yes

20 / 30

How would you know if the previous slack adjustment was done incorrectly?

If the pushrod goes into the chamber

If the pushrod was loose

If the pushrod was tight

If there is wear markings

21 / 30

When using the applied stroke method of checking the s-cam brakes, at what distance should the brakes require adjustment?

More than 1 1/4 inch

More than 1 1/8 inch

More than 1 3/4 inch

More than 1 1/2 inch

22 / 30

With the applied stroke method of servicing s-cam brakes, what is the minimum reservoir pressure required?

70 psi

100 psi

80 psi

65 psi

23 / 30

New air brake chamber pushrods have a marking. What does it indicate?

To indicate when brake adjustment must be done immediately

None of the above

When the pushrod needs to be replaced

That braking pressure is too severe

24 / 30

Do cast iron brake drums expand when heated?

Not in cool weather

After roughly 50 applications

Yes

25 / 30

How can you visually verify that the linings have contacted the drum?

Crawl underneath the vehicle

Use a magnifying glass

If the brake has no dust shields, or if you can see the brake shoes and linings through an inspection slot

You can't

26 / 30

Who uses the applied stroke method for checked adjusting s-cam brakes?

Drivers

Peace officers

Carriers

Roadside inspectors

27 / 30

On long downgrades, what can the expansion of hot brake drums can cause?

A total loss of braking and result in a runaway

Nothing

Shorter stopping distance because of the friction

A longer but controlled stop

28 / 30

How much should you back off the adjusting bolt to establish correct running clearance between the lining and drum?

about 1/2 of a turn

about 1/3 of a turn

about 1/4 of a turn

about 2/3 of a turn

29 / 30

Why should you turn off the engine while doing brake adjustments?

To listen for leaks

To relax the lines

To cool the brakes

None of the above

30 / 30

When correctly adjusted, what is the running clearance between the brake lining and drum?

1/16 on an inch

1/64 of an inch

A few thousandths of an inch

1/32 of an inch

Your score is

BC Air Brake Practice Test 07

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