Saskatchewan Commercial Practice Test 6

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. You pass an emergency vehicle stopped with its lights flashing on your side of the road. What is the maximum speed?

   1. 60 km/h
   2. 30 km/h
   3. 40 km/h
   4. 80 km/h

2. Which of the six driving conditions does SGI call the most important?

   1. Driver condition
   2. Road condition
   3. Weather condition
   4. Vehicle condition

3. In a dual-circuit system, the secondary circuit develops a major leak. What happens?

   1. All service brakes fail at once
   2. The primary circuit keeps working on its own
   3. The compressor shuts down to save air
   4. The spring brakes apply immediately

4. Apart from pole trailers, what is the maximum length of a draw-bar between a motor vehicle and trailer?

   1. 1.83 m (6 ft.)
   2. 4.6 m (15 ft.)
   3. 0.9 m (3 ft.)
   4. 3.05 m (10 ft.)

5. Who must supply the placards and product identification number to the first carrier?

   1. The driver's employer
   2. The consignor (shipper)
   3. The consignee (receiver)
   4. The provincial highway ministry

6. Which inspection schedule applies to a bus seating more than 10 people, including the driver?

   1. Schedule 3
   2. Schedule 4
   3. Schedule 2
   4. Schedule 1

7. What is off-tracking?

   1. Rear wheels following a shorter path than the front wheels
   2. Trailer tires sliding sideways on a wet road
   3. Front wheels drifting toward the outside edge of a sharp curve
   4. The tractor pulling away from the centre line

8. An ambulance driver is responding to a call with lights and siren on. Which statement is true?

   1. The driver may ignore all pedestrians
   2. The driver must still use due care for others
   3. The driver is free of any liability
   4. Other drivers must always stop first

9. What limits the maximum pressure you can apply to the brakes?

   1. The strength of your leg
   2. The air pressure in the reservoir
   3. The size of the foot valve
   4. The governor cut-in setting

10. How does rising temperature from −18 °C toward 0 °C affect braking on ice?

    1. Braking distance gets shorter as ice softens
    2. Braking distance can double as ice gets slicker
    3. It has no effect once the ice is packed
    4. Braking distance stays the same on sanded ice

11. How far apart are the axle centres in a tandem axle group?

    1. More than 1 m and not more than 1.85 m
    2. Exactly 1.5 m in every case
    3. More than 2.4 m and not more than 3.7 m
    4. Less than 1 m apart

12. A typical Class 2 motor coach has at least how many tires and rims to inspect individually?

    1. Four
    2. Eight
    3. Six
    4. Eighteen

13. Turning left with a semi-trailer from a two-way street, how close should the trailer stay to the centre line?

    1. Within about three metres
    2. Centred in the lane
    3. Straddling the centre line
    4. Within about one metre

14. What does a bobtail proportioning relay valve do when no trailer is attached?

    1. Raises service pressure to the drive axle for shorter stops
    2. Lowers service pressure, so you press the pedal farther
    3. Shuts off the front brakes completely
    4. Applies the spring brakes automatically

15. Your disabled truck sits partly in the lane. Where do the three warning devices go?

    1. About 10 m, 50 m and 100 m behind the vehicle, all in the lane
    2. All three about 30 m behind the vehicle in a straight line
    3. 3 m behind on the traffic side, 30 m behind, 30 m ahead
    4. About 3 m ahead, 3 m behind and 30 m behind

16. An automatic slack adjuster is badly out of adjustment. What may bring it back into adjustment?

    1. Up to 12 applications of about 100 psi
    2. One brake application at about 20 psi
    3. Turning the adjusting nut by hand each morning
    4. Driving with the park brake on

17. What does an L restriction on a Saskatchewan licence mean?

    1. No driving outside the province
    2. No Class 2, Class 4 or rideshare vehicles
    3. No passengers for hire in any vehicle
    4. No vehicles with a standard (manual) transmission

18. What can over-braking in a curve or on ice cause with a tractor-trailer?

    1. The fifth wheel to unlock
    2. The air dryer to freeze up
    3. The trailer to overheat its tires
    4. A jackknife or skid

19. Air at 120 psi acts on a 30 square inch diaphragm. How much force does it produce?

    1. 3,600 lb.
    2. 36,000 lb.
    3. 360 lb.
    4. 150 lb.

20. You re-test for your S endorsement 60 days before your five-year anniversary. What happens to the date?

    1. Your anniversary moves 60 days earlier
    2. You must re-test again within 90 days
    3. Your original anniversary date stays the same
    4. Your endorsement is cancelled for 60 days

21. Which trip inspection documents must a commercial driver carry?

    1. Only the PMVI certificate and decal
    2. Only today's report, signed by the vehicle owner and carrier
    3. Reports for the past seven days
    4. Reports for today and yesterday, plus the schedule

22. What may an express transporter not carry in a vehicle carrying passengers?

    1. Live animals, acids or explosives
    2. Bicycles or wheelchairs
    3. Sealed food or bottled water
    4. Mail, parcels or luggage

23. How can heat from hard braking reduce reserve chamber stroke?

    1. Hot cast-iron drums expand, adding push rod stroke
    2. Hot air in the chamber shrinks the diaphragm
    3. Heat stiffens the return spring
    4. Heat raises the governor cut-out pressure

24. What is the minimum licence class needed to drive a school bus carrying up to 15 passengers?

    1. Class 3, with no endorsement
    2. Class 4, with an A endorsement
    3. Class 2, with an S endorsement
    4. Class 5, with an S endorsement

25. What should you use on a burning gasoline or oil fire?

    1. Water mixed with a little dish soap
    2. A wet blanket soaked in diesel fuel
    3. An extinguisher, sand or dirt to smother it
    4. A steady stream of water from a hose