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

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

It should become loose

It should rotate slightly as the bolt is being turned

It should remain tight as the bolt is being turned

None of the above

2 / 30

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

A longer but controlled stop

Nothing

Shorter stopping distance because of the friction

A total loss of braking and result in a runaway

3 / 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

90 psi

70 psi

4 / 30

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

To know you're half way through the adjustment

To know you're done

It indicates that the brake linings have contacted the brake drum

It indicates that the pushrod is at the maximum depth

5 / 30

Do air-brake-equipped vehicles lose their brakes?

Once every 1500 km traveled

Rarely

Once every 500 km traveled

Once a month

6 / 30

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

80 psi

70 psi

100 psi

65 psi

7 / 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

8 / 30

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

A flashlight to inspect components

Lubricant

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

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

9 / 30

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

To indicate when brake adjustment must be done immediately

That braking pressure is too severe

When the pushrod needs to be replaced

None of the above

10 / 30

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

The adjusting bolt is too loose to move

None of the above

The adjusting bolt is too tough to move

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

11 / 30

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

If the distance is more than 1 1/4 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 1/2 of an inch

12 / 30

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

Drivers

Roadside inspectors

Carriers

Peace officers

13 / 30

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

80% pressure

75% pressure

Full pressure

50% pressure

14 / 30

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

It creates a serious safety hazard

Nothing serious happens

It's tough to remove the wrench

A warning light shows on the dash

15 / 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

16 / 30

Do cast iron brake drums expand when heated?

Not in cool weather

Yes

After roughly 50 applications

17 / 30

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

Between 60 and 90 psi

Less than 60 psi

Over 100 psi

Less than 100 psi

18 / 30

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

If the pushrod goes into the chamber

If there is wear markings

If the pushrod was loose

If the pushrod was tight

19 / 30

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

More than 1 3/4 inch

More than 1 1/2 inch

More than 1 1/8 inch

More than 1 1/4 inch

20 / 30

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

3 psi

5 psi

7 psi

9 psi

21 / 30

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

To relax the lines

To listen for leaks

None of the above

To cool the brakes

22 / 30

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

Use a magnifying glass

Crawl underneath the vehicle

You can't

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

23 / 30

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

Only at slow speeds

Yes

In wet weather

24 / 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?

On new vehicles only

Yes

On older vehicles only

25 / 30

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

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

Pull it out and turn it clockwise

Pull it out and turn it counter clockwise

Pull it out so the adjusting bolt can be turned

26 / 30

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

3/4 inch

1/2 inch

3/8 inch

9/16 inch

27 / 30

What is meant by pushrod travel?

The diameter of the pushrod

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

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

The measurement from one end of the pushrod to the other

28 / 30

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

Clevis pin wear

Thread wear

S-cam bushing wear

S-cam spline wear

29 / 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 2/3 of a turn

about 1/4 of a turn

about 1/3 of a turn

30 / 30

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

1/32 of an inch

A few thousandths of an inch

1/64 of an inch

1/16 on an inch

Your score is

BC Air Brake Practice Test 07

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