Manitoba Commercial Practice Test 3

All 25 questions in this test

Every question and its answer choices. The correct answers and explanations appear when you take the test above.

1. What happens to a vehicle driven by someone whose licence is suspended?

   1. It is impounded only if the driver owns it
   2. It is impounded for at least 30 days
   3. It is impounded for 72 hours
   4. It is ticketed but stays with the owner

2. Why might poorly adjusted brakes go unnoticed?

   1. The low air warning hides it
   2. They make the pedal feel softer at all times
   3. The loss shows mainly under heavy demand
   4. They only affect the trailer in reverse

3. You fail the Class 1 knowledge test. When may you try it again?

   1. After seven days
   2. After 30 days
   3. On the next working day
   4. After 14 days

4. A train has just passed on a crossing with two tracks. What should you do before starting across?

   1. Make sure no train is coming on the other track
   2. Go at once before the gates come back down
   3. Follow the train's direction across the tracks
   4. Sound your horn and cross quickly

5. On a right turn, how close to the curb should the trailer's rear wheels stay?

   1. Right against the curb
   2. In the centre of the curb lane
   3. Within about 1.5 m of the curb
   4. Within about 3 m of the curb

6. What is a risk of a trailer with spring brake priority?

   1. Its spring brakes can never be released by the driver
   2. It needs twice as much air to charge
   3. It can move before its service brakes have air
   4. Its service brakes apply when parked

7. What is the only sure way to know tire pressure is correct?

   1. Kicking each tire firmly
   2. Checking the dash warning light
   3. Looking at the tire bulge
   4. Using a tire gauge

8. By what pressure must the low air-pressure warning activate in Manitoba?

   1. Before either tank falls to 55 psi
   2. Before either tank falls to 90 psi
   3. Before either tank falls to 20 psi
   4. Before either tank falls to 100 psi

9. How high may the lower edge of a mud flap be on a road test vehicle?

   1. Any height, if both sides match
   2. No more than 350 mm from the ground
   3. No more than 150 mm from the ground
   4. No more than 600 mm from the ground

10. What windshield damage in the area swept by the wipers must be reported?

    1. Only damage on the passenger side
    2. A star or chip 12.7 mm or larger
    3. Any small scratch at all
    4. Only cracks longer than 30 cm

11. A load is 4.8 m wide. What is required?

    1. Only a wide load sign
    2. Escort vehicles in front and behind
    3. Night travel with amber lights
    4. One escort vehicle behind the load only

12. What causes most skids?

    1. Using the radio while driving
    2. Carrying a light load
    3. Driving too fast for road conditions
    4. Tires that are slightly over-inflated

13. For progressive shifting, at what engine speed does MPI suggest changing gears?

    1. Between 2,000 and 2,400 rpm
    2. Between 1,400 and 1,600 rpm
    3. At the maximum governed rpm
    4. Between 600 and 800 rpm

14. What is the most precise way to know when to change gears?

    1. Feeling the vehicle vibration
    2. Watching the speedometer only
    3. Listening to the engine sound
    4. Watching the tachometer

15. When must the trailer hand valve never be used?

    1. During coupling
    2. For parking or emergency stops
    3. When testing trailer brakes
    4. To check the service line

16. Outside a city, where should a bus stop to load or unload passengers if possible?

    1. Right at a railway crossing
    2. On the opposite side of the road
    3. Clear of the travelled part of the highway
    4. In the centre of the driving lane, with flashers on

17. Outside a city, town or village, how far before the intersection should you signal a turn?

    1. About 15 m
    2. About 500 m
    3. About 150 m
    4. About 30 m

18. What is 'micro sleep'?

    1. A few seconds when the brain tunes out
    2. A 20-minute nap taken at a rest stop on a long trip
    3. Sleeping fewer than six hours a night
    4. The drowsy feeling after a large meal

19. What does the '8 in 3' rule mean when snubbing the brakes on a downgrade?

    1. Drop eight gears within three seconds
    2. Keep speed 8 km/h below the limit for three km
    3. Brake eight times every three minutes
    4. Slow by about 8 km/h in about three seconds

20. In a dual-circuit system, one circuit fails. What still works?

    1. Only the spring parking brakes
    2. Only the trailer hand valve
    3. The brakes on the other circuit's wheels
    4. Nothing; all the service brakes fail at once

21. In the leak test, what is the maximum air loss in one minute for a tractor and one trailer?

    1. 1 psi
    2. 4 psi
    3. 6 psi
    4. 3 psi

22. An empty school bus approaches a railway crossing. Must it stop?

    1. Only on provincial highways
    2. No, only when carrying students
    3. Only if the crossing has no signals
    4. Yes, whether or not it carries passengers

23. A red Class 2.1 placard indicates what kind of dangerous good?

    1. A corrosive liquid
    2. A flammable gas
    3. A non-flammable gas
    4. A radioactive material

24. Where should a single heavy concentrated load go on a straight truck?

    1. At the tailgate for easy unloading
    2. Against the cab for better balance and steering
    3. On one side to leave room for more
    4. Just ahead of the rear axles, long side down

25. What is a slack adjuster's effective length?

    1. Camshaft centre to clevis pin distance
    2. The distance between the two axles
    3. The diameter of the brake chamber
    4. The length of the pushrod when the brake is released