Ontario Air Brake Test 07

When preparing for the Ontario air brake test, it’s important to take advantage of resources like the Ontario air brake practice test. This practice test is an invaluable tool for ensuring that you thoroughly understand the content and format of the actual exam. The practice test contains questions that cover important topics such as air brake adjustment, system components and inspection, and safe driving practices. Additionally, taking the practice test allows you to identify areas where you may need to review material or seek additional resources. With dedication and preparation, you can feel confident going into the Ontario air brake test and ultimately earning your air brake endorsement.

1 / 30

A trailer's spring brakes must automatically apply whenever what happens?

The vehicle is parked

The engine is turned off

The trailer is disconnected from the towing vehicle

All of the above

2 / 30

What is the concern when oil is found in any air tank, other than the supply tank?

It's time for an oil change

There is a risk of air brake system contamination

The tank must be drained

An air hose has been compromised

3 / 30

While a small amount of oil may be found in the supply tank, any visible quantity of oil should be...

Reported or repaired

Cleaned up

None of the above

Ignored

4 / 30

What will generally affect the governor pressure setting?

The age of the compressor

The driver's decision

The model year of the vehicle

The number of brakes on the vehicle

5 / 30

The vehicle passes the test if the device activates when pressure is at or above what psi on both primary and secondary air tank gauges?

None of the above

65 psi

45 psi

55 psi

6 / 30

The vehicle passes the system air-loss rate test when the drop in pressure...

When the warning gauges fail to show anything

When the driver can't hear any air loss

All of the above

Is equal to or less than the value specified for the vehicle

7 / 30

Which of the following is not a step for testing a tractor (towing vehicle) protection valve?

Disconnect the trailer service air line coupler from either the trailer or the dead-end coupler and place it where it can be observed.

Ensure that the air brake system is within its below operating pressure range

Ensure the trailer supply valve is closed (pulled out)

Press and hold the brake pedal

8 / 30

The system's pressure range is controlled by what?

The size of the compressor

The size of the brake chambers

All of the above

The air-compressor governor settings

9 / 30

The vehicle fails the system air-loss rate test when...

The drop in pressure exceeds the value specified for the vehicle

The compressor cuts out

None of the above

The drop in pressure is barely noticeable

10 / 30

The air brake system is defective when cut-out pressure is above...

135 psi

155 psi

125 psi

145 psi

11 / 30

A significant quantity of moisture being discharged from the supply tank - even when the tank is drained on a regular basis is...

Normal

Time to replace the tanks

A bigger problem

Cause for concern

12 / 30

Which of the following is not one of the steps for testing air-compressor governor settings?

Run the engine until air brake system pressure reaches its maximum level and note the cut-out pressure setting

Properly secure the vehicle and apply the spring brakes

Press and release the brake pedal several times to lower the system pressure and note the cut-in pressure setting

Observe the primary and secondary air-tank pressure gauges

13 / 30

When testing air pressure build-up time, how fast should the rpm be?

500 rpm

1200 rpm

900 to 1100 rpm

600 to 900 rpm

14 / 30

The air loss rate for a straight truck, tractor or bus is...

1 psi per minute

3 psi per minute

4 psi per minute

2 psi per minute

15 / 30

When do air pressure gauges stop climbing?

When the rpm of the engine drops

When the brakes are not applied

All of the above

With compressor cut-out

16 / 30

The air loss rate for a tractor and trailer is...

2 psi per minute

4 psi per minute

1 psi per minute

3 psi per minute

17 / 30

Which of the following is not a step when testing the automatic application of the trailer spring brakes?

Ensure the air brake system is within its normal operating pressure range

Observe the trailer for application of the trailer's spring brakes

Pull out the trailer supply valve to close it

Ensure the trailer supply valve is closed and the trailer is fully charged

18 / 30

To test the air-pressure build-up time, what should the system pressure be reduced to?

Below 80 psi

Below 50 psi

Above 90 psi

Below 60 psi

19 / 30

When testing air-compressor governor settings, what does compressor cut-in cause?

A beeping sound

Less horsepower

A change in the sound of the engine

Weak braking power

20 / 30

The vehicle fails the test if the device does not activate or activates when pressure is below what psi on both primary and secondary air tank gauges?

75 psi

65 psi

55 psi

45 psi

21 / 30

To test the air-loss rate of the brake system, release the spring brakes, establish normal air pressure, shut off the engine and hold the brake pedal in the fully applied position and observe the air-pressure readings for how long?

One minute

Two minutes

Three minutes

Four minutes

22 / 30

What happens if the device does not activate or activates when pressure is below the described psi on either the primary or secondary air pressure gauge?

It fails

It must be tested again with the engine off

It sends a warning

Start the engine and try again

23 / 30

When testing the low air pressure warning devices, what should the psi be?

90 psi

55 psi

75 psi

80 psi

24 / 30

After the air tanks are drained regularly, what should happen?

The drain valves cleaned

All of the above

The drain valves replaced

The discharge should be observed for abnormalities

25 / 30

Which of the following is not a step for testing low air-pressure warning devices?

Observe the primary and secondary air tank pressure gauges

Watch and listen for the low air-pressure warning device to activate

Press and release the brake pedal repeatedly to lower air pressure

The engine may be stopped or left running but the ignition must be off

26 / 30

The air loss rate for a tractor and two or more trailers is...

4 psi per minute

8 psi per minute

5 psi per minute

6 psi per minute

27 / 30

When testing a tractor (towing vehicle) protection valve, the vehicle passes the test when...

Air does not extend beyond the primary tank

Air does not exhaust from the trailer service line

All of the above

Air does not exhaust from the brake chambers

28 / 30

With the engine idling between 600 and 900 rpm, how long should it take for the air pressure to rise from 85 to 100 psi?

Up to 3 minutes

4 minutes or more

Within 2 minutes

Less than 60 seconds

29 / 30

Which of the following is not a step when testing the spring (parking and emergency) brakes?

Ensure the air tanks are full

Observe the vehicle's response

Apply the spring brakes on the vehicle to be tested and remove wheel chocks

Gently apply engine power in a low gear

30 / 30

To test the low air-pressure warning device, pressure in the system must be reduced to the point where the device activates or what at psi, whichever is higher?

45 psi

55 psi

35 psi

65 psi

Your score is

Ontario Air Brake Test 07

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