Saskatchewan Commercial Practice Test 7

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 should you connect gladhands?

   1. Clean them, put the seals together at 90° and snap down
   2. Line them up straight and twist clockwise
   3. Connect them with the engine stopped and tanks empty
   4. Grease the rubber seals heavily first

2. During the in-cab check, how far may the brake pedal travel under heavy force?

   1. No more than 50% of its available travel
   2. No more than 80% of its available travel
   3. No more than 95% of its available travel
   4. All the way to the floor, then release

3. What does a front axle ratio valve do during light brake applications?

   1. Reduces pressure to the front brakes
   2. Doubles the application pressure to the front brakes
   3. Shuts off the rear brakes
   4. Applies only the trailer brakes

4. How must different classes of livestock be transported together?

   1. Tied together to stop them shifting
   2. Loaded with the largest animals at the front
   3. Separated by a partition
   4. Only with a veterinarian on board

5. All air has been lost and the spring brakes have applied. How can the vehicle be moved?

   1. Pump the foot valve several times until the brakes release
   2. Repair and recharge, or cage the springs
   3. Pull the park brake valve out and then push it back in
   4. Use the trailer hand valve to release them

6. When may a school bus driver leave students alone on the bus?

   1. Only for less than five minutes at a scheduled stop
   2. Only if an older student is left in charge of the others
   3. Never, under any circumstances
   4. With an interlock set, or engine off, key out, brake on

7. Which warning is required on an over-dimension load during daylight hours?

   1. Clearance lights along the edges
   2. Red flags at its extremities and edges
   3. Reflective tape only on the rear
   4. A white light at the rear

8. When may an emergency vehicle driver disregard the ordinary rules of the road?

   1. Any time the vehicle is on duty in its own area
   2. Any time its lights are flashing, even without a siren
   3. Only between midnight and 6 a.m.
   4. Only on a call, using siren and lights

9. If you double your speed, how much braking force do you need to stop in the same distance?

   1. Eight times as much
   2. Three times as much
   3. Four times as much
   4. Twice as much

10. What can happen if you use an engine retarder on a slippery road?

    1. The drive wheels may lock and the unit may jackknife
    2. The retarder will switch off the ABS system
    3. The trailer brakes will apply on their own and stay applied
    4. The air tanks will lose pressure quickly

11. A truck has hydraulic brakes with an air-powered assist. Do you need an A endorsement?

    1. Only if the truck has three axles
    2. Only for trips outside Saskatchewan
    3. No, air-over-hydraulic brakes are exempt
    4. Yes, any air component at all requires it

12. About how long is brake lag in a properly maintained air brake system?

    1. About 4/10 of a second
    2. About 1 1/2 seconds
    3. About 2 seconds
    4. About 1/100 of a second

13. An experienced commercial driver in Saskatchewan wants to take a phone call while driving. What is allowed?

    1. Holding the phone on speaker below the dash
    2. Holding the phone briefly if the call lasts under one minute
    3. A mounted hands-free phone using voice or one touch
    4. Texting only while stopped at a red light

14. How long should it take the compressor to raise pressure from 85 to 100 psi at 600–800 rpm?

    1. Less than ten seconds
    2. Less than two minutes
    3. Less than five minutes
    4. Exactly three minutes

15. Under the TDG Regulations, Class 3 dangerous goods are what?

    1. Explosives
    2. Flammable liquids
    3. Radioactive materials
    4. Corrosives

16. Who may supervise a driver who holds a learner endorsement for a higher class?

    1. A driver who has held any commercial class for at least 90 days
    2. A driver who has held that class for 365 days in the last three years
    3. Any driver with a Class 5 licence held for one year
    4. Any certified instructor, even without that class

17. What is the minimum pressure at which the governor should cut the compressor back in?

    1. 80 psi (552 kPa)
    2. 120 psi (828 kPa)
    3. 60 psi (414 kPa)
    4. 100 psi (690 kPa)

18. A typical Class 1 combination has at least how many tires and rims to inspect?

    1. 10
    2. 22
    3. 8
    4. 18

19. Why do brakes lose power after long, hard use on a downgrade?

    1. The brake fluid freezes in the lines
    2. The linings swell and lock the wheels
    3. Hot drums expand away from the linings
    4. The air pressure in the tanks rises too high

20. When turning left with a bus, when do you start turning the wheel?

    1. When the intersecting curb line shows in the front left window
    2. As soon as the front bumper begins to enter the intersection
    3. When the rear wheels pass the stop line
    4. When your mirror shows the cross street

21. Before leaving the driver's seat of a bus, what must you do?

    1. Stop the engine, remove the key and set the brakes
    2. Put an automatic transmission in drive
    3. Leave the engine idling with the doors open
    4. Set the brakes but leave the key for the next driver

22. Why does an under-inflated tire raise the risk of hydroplaning?

    1. It cannot push water out from under the tread well
    2. It makes the steering wheel too easy to turn
    3. It runs cooler and loses its grip on the road
    4. It lifts the vehicle higher off the road surface

23. At what point in a turn is mirror vision of a tractor-trailer most limited?

    1. When the front wheels first begin to turn
    2. When the trailer is straight behind the tractor
    3. When the tractor is at its sharpest angle to the trailer
    4. When the unit has fully completed the turn and straightened out

24. What does 'compounding' the brakes mean?

    1. Draining both reservoirs at the same time
    2. Applying the service brakes while the park brake is on
    3. Using the hand valve and foot valve together
    4. Pumping the brakes on a downgrade

25. When uncoupling, at what point do you stop to dump the tractor air suspension?

    1. Before releasing the fifth-wheel lock
    2. Before lowering the landing gear
    3. After the tractor is fully clear of the trailer
    4. When the kingpin is just clear of the jaws