Saskatchewan Commercial Practice Test 1

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. The supply line to the trailer ruptures. What happens to the trailer brakes?

   1. They go into an emergency application at once
   2. They release completely
   3. They wait until the next foot application
   4. They work only with the hand valve

2. In winter, how often should you drain the air tanks?

   1. Only when the low air warning sounds
   2. Once a month during cold weather
   3. Daily, leaving them empty when not in use
   4. Only when water is seen at the gladhands

3. Your truck has an air dryer. Do you still need to drain the reservoirs?

   1. Only if the air dryer's own warning light comes on
   2. Only once a month during the summer driving season
   3. Yes, daily; the dryer does not remove all moisture
   4. No, the dryer removes all the water

4. One wheel's brake is poorly adjusted. What happens to the other brakes?

   1. They lock up at the first application
   2. They release slightly to balance the load
   3. They do more than their share and may overheat
   4. They keep working exactly as before

5. How is a straight truck designed to carry its cargo weight?

   1. All of it on the rear tires
   2. About 50% on each axle
   3. About 90% on the rear tires, 10% on the front
   4. About 70% on the front, 30% on the rear

6. A driver has taken a sedating medication and then drinks a beer. How do the effects combine?

   1. They add up to the two amounts together
   2. They multiply, causing far more impairment
   3. The medication cancels out the alcohol
   4. Only the alcohol affects driving ability

7. Your load overhangs the truck body. What marking is required at night?

   1. A red flag tied to the end of it
   2. A red light at the end of the overhang
   3. A white reflector on each side of the overhang
   4. An amber flashing light on the cab

8. At what pressure must the governor cut out the compressor?

   1. Between 80 and 100 psi
   2. Between 60 and 70 psi
   3. Exactly 150 psi
   4. Between 120 and 145 psi

9. What vehicle must you bring for a Class 1 road test?

   1. A school bus with air brakes
   2. A three-axle power unit and a 48 ft or longer trailer
   3. A two-axle truck towing any trailer heavier than 4,600 kg
   4. A tandem tractor without a trailer

10. Why might badly adjusted brakes go unnoticed?

    1. They only fail in warm weather
    2. The low air warning hides them
    3. They make the pedal feel harder
    4. They seem fine under light braking

11. A passenger urges a taxi driver to speed to catch a flight. What does SGI's research show?

    1. Speeding in city traffic saves only a few minutes
    2. Breaking rules is legal for paid fares
    3. Fast drivers have fewer collisions overall
    4. Speeding cuts city trip times in half

12. When may a driver refuse passage to a person who offers the legal fare at a scheduled stop?

    1. When it is full, or the person is drunk or disorderly
    2. When the person has a large suitcase
    3. When the person boards at a rural stop
    4. When the bus is running behind its published schedule

13. Trailers heavier than what weight must have their own service brakes?

    1. 900 kg (2,000 lb.)
    2. 1,360 kg (3,000 lb.)
    3. 2,000 kg (4,400 lb.)
    4. 4,600 kg (10,141 lb.)

14. Why is driving in a caravan of trucks prohibited?

    1. It wastes fuel by increasing wind resistance on the lead truck
    2. It confuses drivers at weigh scales ahead
    3. It overloads bridges with too many axles
    4. It leaves too little room to stop and blocks passing

15. On a highway curve to the left, where should you keep the front wheels?

    1. In the middle of the lane
    2. Over the centre line slightly, to give the rear wheels room
    3. Close to the right edge
    4. Close to the centre line

16. With a push-to-release park valve, at about what pressure do spring brakes begin to drag?

    1. About 10 psi
    2. About 70 psi
    3. About 45 psi
    4. About 100 psi

17. Before entering a provincial highway, how far from the travelled portion must a school bus stop?

    1. Not less than 1 m and not more than 3 m
    2. Not less than 15 m and not more than 30 m
    3. Exactly at the shoulder line
    4. Not less than 4 m and not more than 10 m

18. What is the last coupling step SGI lists before driving away?

    1. Pull ahead and test trailer brakes with the hand valve
    2. Release the tractor air suspension and leave it lowered
    3. Lower the landing gear back down to the ground for support
    4. Disconnect the electrical cord to test it

19. Which two valves make up the tractor protection system?

    1. The relay valve and the quick-release valve on the axle
    2. The foot valve and the trailer hand control valve
    3. Trailer-supply valve and tractor protection valve
    4. The safety valve and the governor

20. A fuel tanker has unloaded, but residue still makes it hazardous. How is the shipping document marked?

    1. RESIDUE – LAST CONTAINED
    2. CLEANED – NO HAZARD
    3. EMPTY – NOT REGULATED
    4. RETURN – SEE SHIPPER

21. How should you drive through a curve to avoid skidding, rolling or jackknifing?

    1. Slow before the curve, then apply gentle power
    2. Keep your speed and steer sharply at the apex
    3. Coast through the curve in neutral
    4. Brake firmly in the middle of the curve

22. Under the weight and dimension regulations, a bus is a vehicle designed to carry more than how many passengers?

    1. 36
    2. 24
    3. 15
    4. 10

23. What is the minimum number of exits every passenger vehicle must have?

    1. Four
    2. Three
    3. One
    4. Two

24. Which trucks may a driver with a G (heavy trailer) endorsement use to tow heavy trailers?

    1. Two-axle trucks that are not power units
    2. Buses seating more than 24 people
    3. Any power unit with a fifth wheel and a semi-trailer
    4. Three-axle trucks over 11,794 kg

25. Where is the PMVI decal placed on a bus or school bus?

    1. On the rear bumper
    2. On the right window
    3. On the left window
    4. On the left front corner