Saskatchewan Commercial Mock Exam 2

All 73 questions in this test

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

1. On a steep downgrade, how far below maximum governed rpm should you keep the engine?

   1. At least 200 to 300 rpm below
   2. At least 800 to 1,000 rpm below
   3. Right at the governed maximum
   4. At least 50 to 100 rpm below

2. After adjusting a manual slack adjuster, how much push rod travel should there be when pulled by hand?

   1. Less than 1/8 inch
   2. 1 to 1 1/2 inches
   3. 1/2 to 3/4 inch
   4. About 2 inches

3. 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

4. During which hours do most fatigue-related collisions occur?

   1. Noon–2 p.m. and 6–9 p.m.
   2. 1–4 p.m. and 2–6 a.m.
   3. 10 a.m.–noon and 8–11 p.m.
   4. 7–9 a.m. and 4–6 p.m.

5. 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

6. 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

7. What is a trailer jackknife?

   1. The rear of the trailer swings around
   2. The kingpin breaks loose from the fifth wheel
   3. The trailer tips onto its side
   4. The tractor's rear skids sideways

8. Your tractor-trailer starts to skid. When might gentle use of the hand valve help?

   1. Whenever the road is icy
   2. When the tractor skids, to help straighten the unit
   3. Only to hold the unit still when parked on a grade
   4. When the trailer is skidding sideways behind you

9. 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

10. How can you apply the trailer brakes without the tractor brakes?

    1. Press the foot valve lightly
    2. Turn on the engine retarder
    3. Use the trailer hand control valve
    4. Pull the yellow parking brake valve

11. For a two-point highway turn-about, how far past the intersection should the trailer's rear be when you stop?

    1. At least 3 m (10 ft.)
    2. At least 30 m (100 ft.)
    3. At least 9 m (30 ft.)
    4. Exactly level with the approach

12. How do you test the trailer's emergency brakes in the Class 1 brake response test?

    1. Hand valve applied, then reverse slowly
    2. Trailer brakes off, tractor brakes on, pull hard
    3. Trailer emergency brakes on, tractor brakes off, pull gently
    4. Both park brakes off, coast down a slope

13. During offset backing to the driver's side, when do you turn the wheel fully left?

    1. Before you put the unit in reverse
    2. When the tractor tires line up with the landing gear
    3. As soon as the trailer begins to move backward at all
    4. When the rear of the trailer reaches the edge of the stop box

14. How long before driving a school bus must a driver avoid alcohol?

    1. Four hours
    2. Twenty-four hours
    3. Eight hours
    4. Twelve hours

15. What does a converter dolly do?

    1. Lifts an axle off the road when empty
    2. Converts a semi-trailer into a full trailer
    3. Links two tractors for heavy hauling
    4. Converts a tractor into a straight truck

16. When uncoupling, how far should you lower the landing gear?

    1. Until the trailer lifts fully clear of the fifth wheel plate
    2. Until the trailer is level with the dock
    3. Just until the pads touch the ground lightly
    4. Until most weight is off the tractor, trailer still on the fifth wheel

17. 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

18. 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

19. 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

20. Placards rather than labels are used on containers larger than what capacity?

    1. 450 litres
    2. 200 litres
    3. 45 litres
    4. 1,000 litres

21. 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

22. Why should you never take a spring-brake chamber apart?

    1. It lets moisture into the air system
    2. The compressed spring can cause serious injury
    3. It voids the vehicle's inspection decal
    4. It changes the slack adjuster angle

23. 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

24. 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

25. During the Class 1 trip inspection, what must be true of the fifth-wheel locking handle?

    1. It is in the locked position
    2. It is removed and stowed in the cab
    3. It is tied back with wire
    4. It is pulled out for easy release

26. A temporary foreign worker has a Class 1 licence from another country. Can they drive a semi in Saskatchewan?

    1. Yes, with an air brake endorsement
    2. Yes, for up to 90 days after entering Canada
    3. Yes, if an employer's supervisor rides along
    4. No; they need MELT and a Saskatchewan Class 1

27. What is the job of the air compressor?

    1. To build up and maintain air pressure
    2. To remove water from the air supply
    3. To apply air to the brake chambers
    4. To store air for several brake stops

28. 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

29. 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

30. 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

31. When passing on a highway, what sight distance should a school bus driver have?

    1. At least 50 seconds
    2. At least 20 seconds
    3. At least 2 minutes
    4. At least 10 seconds

32. Before pulling a bus away from the curb, what should you do besides checking the mirror?

    1. Look over your left shoulder
    2. Open the door to check behind
    3. Flash the headlights twice
    4. Sound the horn three times

33. 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

34. What may a bus driver not do while the vehicle is moving?

    1. Collect fares or load and unload passengers
    2. Use the mirrors to watch passengers
    3. Adjust the heater or ventilation
    4. Answer a passenger's urgent question

35. How often must a school bus driver re-test to keep the S endorsement?

    1. Every five years
    2. Every ten years
    3. Every year
    4. Every three years

36. 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

37. 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

38. 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.)

39. Which manoeuvres are added to the Class 1 road test?

    1. Parallel parking on a city street and a hill start only
    2. Offset and alley dock backing, coupling and uncoupling
    3. A U-turn in town and a reverse slalom
    4. A skid pad recovery test and a controlled emergency stop

40. What is a B-train?

    1. A tractor and semi-trailer towing a full trailer hitched with an A-dolly
    2. A truck towing a pony trailer with a rigid drawbar
    3. A tractor and semi-trailer towing a semi-trailer on a rear fifth wheel
    4. A tractor and semi-trailer towing a trailer with a C-dolly

41. Which vehicle needs a Class 4 licence in Saskatchewan?

    1. A highway coach seating 40
    2. A two-axle truck towing 6,000 kg
    3. A three-axle gravel truck
    4. An ambulance being used for hire

42. 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

43. During a Class 2 bus trip inspection, what must you check at the emergency exits?

    1. They are locked so passengers cannot open them
    2. They open and close properly and the alarm works
    3. Only the roof hatch, since doors are checked daily
    4. They are covered to keep out dust and cold

44. How does the Class 1 trip inspection test differ from Classes 2 to 4?

    1. You inspect a random block of components and describe defects
    2. You inspect the trailer only, not the tractor
    3. You may use a checklist from the examiner
    4. You only answer written questions about inspections

45. At about what temperature do most brake linings work best?

    1. Around 250 °C
    2. Around 30 °C
    3. Around 120 °C
    4. Around 300 °C

46. 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

47. How many hours of Mandatory Entry-Level Training does a Class 1 applicant need before the road test?

    1. At least 40 hours
    2. At least 80 hours
    3. At least 200 hours
    4. At least 121.5 hours

48. 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

49. 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

50. Your permit allows a heavier load, but a bridge sign posts a lower weight limit. What applies?

    1. The sign applies only at night
    2. The posted sign must be obeyed
    3. Either one, at the driver's choice
    4. The permit overrides the sign

51. Which matter must a school bus driver promptly report to the employer?

    1. Any change in the driver's home phone
    2. A minor dent found on a private car in the driveway
    3. A medical condition that could affect safe driving
    4. A parking ticket received on a personal vehicle

52. What must every trailer equipped with brakes have in case it breaks loose?

    1. A spare set of gladhands kept in a sealed box
    2. A second electrical cord as backup
    3. A reflector on the hitch tongue
    4. A device to apply its brakes automatically

53. If both the weight and the speed of a truck are doubled, how much more stopping power is needed?

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

54. 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

55. 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)

56. What is the purpose of the one-way check valve between the supply and service reservoirs?

    1. It warns the driver of low pressure
    2. It stops air flowing back if the supply side fails
    3. It lets air flow both ways to balance tanks
    4. It releases excess pressure into the air

57. On a highway with a speed limit over 50 km/h, how far before a stop must the school bus safety lights come on?

    1. At least 25 m
    2. At least 100 m
    3. At least 200 m
    4. At least 50 m

58. With the brakes released, what angle should the slack adjuster arm make with the push rod?

    1. Less than 90°
    2. Exactly 180°
    3. Exactly 45°
    4. Greater than 90°

59. When must the strobe light on a school bus be used?

    1. Only in fog, rain or snow, at any time of day
    2. Only on gravel roads at night
    3. Only while students are loading or unloading at a stop
    4. Whenever carrying passengers outside a town

60. How should you attach the converter dolly tongue to the pintle hook?

    1. By leaving the safety latch open for turns
    2. By backing into it at speed
    3. By hand, then fasten the latch, chain and pin
    4. With the trailer hand valve applied

61. How far from an intersection should you preferably park when stopping for a break?

    1. 300 m (1,000 ft.) or more
    2. 15 m (50 ft.) or more
    3. 153 m (500 ft.) or more
    4. 50 m (165 ft.) or more

62. When should the bus doors be opened at a loading zone?

    1. Just before the bus stops, to save time
    2. Only after the bus has come to a full stop
    3. Whenever passengers stand up to leave
    4. As soon as you begin to slow down

63. 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%

64. In a train, the rear trailer starts to fishtail. What does SGI recommend?

    1. Brake hard with the foot valve and steer away from the swing
    2. Steer sharply against the swing
    3. Lightly apply trailer brakes and add power
    4. Release power and coast to a stop

65. Before a right turn with a long unit, why position the trailer as SGI shows?

    1. To stop traffic from squeezing in on your right
    2. To give pedestrians a wider crosswalk
    3. To keep the trailer off the centre line
    4. To let following cars pass on the left

66. Of the Class 1 MELT hours, how many are spent behind the wheel?

    1. 47 hours
    2. 57 hours
    3. 30 hours
    4. 17.5 hours

67. At what pressure must the low air warning activate?

    1. Below 100 psi (690 kPa)
    2. Below 45 psi (310 kPa)
    3. Below 20 psi (138 kPa)
    4. Below 60 psi (414 kPa)

68. 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

69. On ice and snow, how much longer can stopping distances be than on dry pavement?

    1. Two to three times longer
    2. About 50% longer
    3. Fifteen to 20 times longer
    4. Three to 12 times longer

70. 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

71. What does a quick-release valve do?

    1. Opens the safety valve when pressure is high
    2. Applies the brakes faster in an emergency
    3. Exhausts air near the chamber to release brakes faster
    4. Lets the driver release the spring brakes

72. Which function belongs to the relay emergency valve on a trailer?

    1. It dries the air before it reaches the trailer tank
    2. It controls the tractor's spring parking brakes
    3. Applies the trailer brakes if the supply line parts
    4. It lowers pressure to the trailer's front axle

73. 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