Saskatchewan 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. How often does SGI recommend a commercial driver stop to rest?

   1. Only after 13 hours of driving
   2. At least every two hours
   3. At least every four hours
   4. Whenever the fuel tank is half empty

2. A tire is hot after a long run and its pressure reads high. What should you do?

   1. Leave it; check and adjust pressure when cold
   2. Spray it with water to cool it down
   3. Add air so it matches the other tires
   4. Bleed it down to the cold pressure setting

3. How should safety chains be attached between a converter dolly and the lead trailer?

   1. Crossed under the tongue
   2. Left hanging loose for turning
   3. Wrapped around the pintle hook
   4. Attached to the dolly axle only

4. Which knowledge papers does a Class 2 applicant write?

   1. Class 1, Class 2 and Air Brake
   2. Sign, Basic, Class 2, Class 3 and Class 4
   3. Sign, Basic, Class 2 and School Bus
   4. Sign, Basic and Class 2 only

5. What is the maximum length of a single vehicle in Saskatchewan without a permit?

   1. 15 m
   2. 10.5 m
   3. 23 m
   4. 12.5 m

6. Why is the first reservoir also called the wet tank?

   1. It sits closest to the fuel tank
   2. It is the only tank fitted with a draincock
   3. It is filled with antifreeze in the winter
   4. Most water and oil from the compressor collect there

7. After adjusting, you tap the brake drum with a hammer and hear a dull sound. What does it mean?

   1. The brake is perfectly adjusted
   2. The lining is new and still bedding in
   3. The brake is dragging and needs readjusting
   4. The drum is cracked and must be replaced

8. Wear down the centre of a tire's tread usually means what?

   1. The tire has been over-inflated
   2. The wheels are out of balance
   3. The tire has been under-inflated
   4. The tire is a mismatched radial

9. An emergency vehicle with lights and siren approaches while you are inside an intersection. What must you do?

   1. Stop at once in the middle of the intersection
   2. Keep going at normal speed in your lane
   3. Clear the intersection, then pull right and stop
   4. Reverse out of the intersection quickly

10. Who is not allowed to obtain a Class 1, 2, 3 or 4 licence?

    1. A driver who is still a novice
    2. A driver with a farm-plated truck
    3. A driver who holds a Class 5 licence
    4. A driver over 65 years of age

11. How does a longer wheelbase affect off-tracking?

    1. It increases the amount of off-track
    2. It has no effect on off-tracking
    3. It reduces the amount of off-track
    4. It removes off-track on gentle curves

12. Reflective tape along each side of a trailer must cover at least how much of its length?

    1. 100%
    2. 25%
    3. 75%
    4. 50%

13. A towed vehicle's own lights do not work. What is required?

    1. Nothing, if towing only in daylight
    2. Temporary tail, brake and signal lights
    3. A red flag tied to the towed vehicle's front bumper
    4. Hazard lights on the tow truck only

14. Why should tailgate loading never be practised?

    1. It wastes space at the front of the box
    2. It is allowed only when hauling empty pallets or bins
    3. It makes unloading at docks slower
    4. It strains the equipment and leads to collisions

15. A school bus must stop at which railway crossings?

    1. All of them, unless automatic signals show clear
    2. Only crossings that also have a stop sign posted
    3. Only crossings with more than one set of tracks
    4. Only crossings outside towns

16. Why should you release the parking brakes before a full foot-brake application test?

    1. To avoid compounding the forces on the brake parts
    2. To keep the low air warning from sounding
    3. To stop the trailer from rolling forward
    4. To let the compressor cut in sooner

17. Which items should an en route inspection cover?

    1. Only the mirrors and the windshield
    2. Only the paperwork, the logbook and the bill of lading
    3. Only fluid levels and the fuel tank
    4. Tires, hubs, brakes, couplings, lights, load

18. In a combination with air brakes, what does the foot valve do to the trailer brakes?

    1. Applies them at the same pressure as the tractor's
    2. Applies them at half the tractor's pressure
    3. Applies them only after the tractor stops
    4. Releases them so the tractor does the braking

19. How often must a Transportation of Dangerous Goods training certificate be renewed?

    1. Every 24 months
    2. Every 12 months
    3. Every 36 months
    4. Every 60 months

20. The service line to the trailer ruptures. When will you notice an effect?

    1. Immediately, as the trailer brakes apply
    2. Only when the trailer-supply valve is closed
    3. Never, the tractor protection valve seals it
    4. Only when you make a brake application

21. How must the practical air brake demonstration be done?

    1. Unassisted, without a checklist, on your own equipment
    2. With the examiner reading out each step for you to follow
    3. With a written checklist you bring along
    4. On an SGI-owned training simulator

22. Which valves separate the primary and secondary reservoirs from the supply reservoir?

    1. Relay valves
    2. Quick-release valves
    3. One-way check valves
    4. Safety valves

23. What is the most common cause of air brake failure?

    1. Poor brake adjustment
    2. A cracked compressor
    3. Low engine oil
    4. A burnt-out stop lamp

24. You need to turn a tractor-trailer around in a town. What does SGI advise?

    1. Use a three-point turn at the next corner
    2. Drive around the block instead of a U-turn
    3. Back into a driveway and pull out
    4. Make a U-turn on a wide four-lane street

25. You drop students at their school on a two-way street. Where should the bus stop?

    1. On the far side, so students cross at the lights
    2. On the school's side, so students step onto the sidewalk
    3. In the school parking lot, backing in
    4. In the centre lane with the stop arm out