What is the last coupling step SGI lists before driving away?
Saskatchewan Commercial overview
SGI Class 1 Practice Test
Free practice questions for SGI's 20-question Class 1 paper: coupling and uncoupling, trains, MELT, the Class 1 trip inspection and tractor-trailer handling.
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A Saskatchewan Class 1 licence lets you drive a power unit pulling a semi-trailer and any truck towing more than 4,600 kg. It is the only class that writes all six papers: Sign (30 questions), Basic Class 5 (20), Class 1 (20), Class 2 (15), Class 3 (10) and Class 4 (10). Most semi drivers also need the 18-question air brake paper. Before the road test you must finish at least 121.5 hours of Mandatory Entry-Level Training.
This page focuses on the topics we group under the Class 1 paper: coupling and uncoupling a tractor-trailer with air ride suspension, hooking up a pup-train and converter dolly, draw-bar and safety chain rules, the Class 1 trip inspection and road test, combination braking and jackknifing. For the other papers, use our Class 2, 3 and 4 pages and the air brake test, then take the full mock exam, which follows SGI's 20-15-10-10-18 blueprint.
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All 28 questions in this test
Every question and its answer choices. The correct answers and explanations appear when you take the test above.
What is the last coupling step SGI lists before driving away?
- Pull ahead and test trailer brakes with the hand valve
- Release the tractor air suspension and leave it lowered
- Lower the landing gear back down to the ground for support
- Disconnect the electrical cord to test it
How many hours of Mandatory Entry-Level Training does a Class 1 applicant need before the road test?
- At least 40 hours
- At least 80 hours
- At least 200 hours
- At least 121.5 hours
Apart from pole trailers, what is the maximum length of a draw-bar between a motor vehicle and trailer?
- 1.83 m (6 ft.)
- 4.6 m (15 ft.)
- 0.9 m (3 ft.)
- 3.05 m (10 ft.)
What is a trailer jackknife?
- The rear of the trailer swings around
- The kingpin breaks loose from the fifth wheel
- The trailer tips onto its side
- The tractor's rear skids sideways
When a coupling device other than a fifth wheel is used, what else is needed?
- An auxiliary chain or cable as strong
- A red flag on the draw-bar
- An extra set of trailer mud flaps
- A second fifth wheel fitted to the front of the trailer
A temporary foreign worker has a Class 1 licence from another country. Can they drive a semi in Saskatchewan?
- Yes, with an air brake endorsement
- Yes, for up to 90 days after entering Canada
- Yes, if an employer's supervisor rides along
- No; they need MELT and a Saskatchewan Class 1
How should you attach the converter dolly tongue to the pintle hook?
- By leaving the safety latch open for turns
- By backing into it at speed
- By hand, then fasten the latch, chain and pin
- With the trailer hand valve applied
What can over-braking in a curve or on ice cause with a tractor-trailer?
- The fifth wheel to unlock
- The air dryer to freeze up
- The trailer to overheat its tires
- A jackknife or skid
When lining up to couple, where should you first stop the tractor?
- With the fifth wheel locked under the kingpin
- Fifth wheel just ahead of the trailer, off the kingpin
- About ten metres away, so you can walk around and inspect the trailer
- With the drive wheels under the trailer apron
Which manoeuvres are added to the Class 1 road test?
- Parallel parking on a city street and a hill start only
- Offset and alley dock backing, coupling and uncoupling
- A U-turn in town and a reverse slalom
- A skid pad recovery test and a controlled emergency stop
When uncoupling, at what point do you stop to dump the tractor air suspension?
- Before releasing the fifth-wheel lock
- Before lowering the landing gear
- After the tractor is fully clear of the trailer
- When the kingpin is just clear of the jaws
During offset backing to the driver's side, when do you turn the wheel fully left?
- Before you put the unit in reverse
- When the tractor tires line up with the landing gear
- As soon as the trailer begins to move backward at all
- When the rear of the trailer reaches the edge of the stop box
After connecting the air lines, how do you supply air to the trailer?
- Pull out the yellow parking brake valve
- Open the draincock on the trailer tank
- Apply the trailer hand valve fully
- Push in the red trailer supply valve
How can you apply the trailer brakes without the tractor brakes?
- Press the foot valve lightly
- Turn on the engine retarder
- Use the trailer hand control valve
- Pull the yellow parking brake valve
Before backing under a trailer, how should the fifth wheel look?
- Dry, with all grease wiped off
- Slide pins pulled out and unlocked
- Horns tilted down and jaws unlocked (open)
- Horns tilted up and jaws locked
How does the Class 1 trip inspection test differ from Classes 2 to 4?
- You inspect a random block of components and describe defects
- You inspect the trailer only, not the tractor
- You may use a checklist from the examiner
- You only answer written questions about inspections
How should safety chains be attached between a converter dolly and the lead trailer?
- Crossed under the tongue
- Left hanging loose for turning
- Wrapped around the pintle hook
- Attached to the dolly axle only
How do you test the trailer's emergency brakes in the Class 1 brake response test?
- Hand valve applied, then reverse slowly
- Trailer brakes off, tractor brakes on, pull hard
- Trailer emergency brakes on, tractor brakes off, pull gently
- Both park brakes off, coast down a slope
After you hear the fifth wheel lock, how should you confirm the coupling?
- Drive one block and then check it
- Rock the trailer with the landing gear
- Listen for the air dryer to purge
- Do at least two tug tests and look at the jaws
During the Class 1 trip inspection, what must be true of the fifth-wheel locking handle?
- It is in the locked position
- It is removed and stowed in the cab
- It is tied back with wire
- It is pulled out for easy release
When uncoupling, how far should you lower the landing gear?
- Until the trailer lifts fully clear of the fifth wheel plate
- Until the trailer is level with the dock
- Just until the pads touch the ground lightly
- Until most weight is off the tractor, trailer still on the fifth wheel
A typical Class 1 combination has at least how many tires and rims to inspect?
- 10
- 22
- 8
- 18
What must every trailer equipped with brakes have in case it breaks loose?
- A spare set of gladhands kept in a sealed box
- A second electrical cord as backup
- A reflector on the hitch tongue
- A device to apply its brakes automatically
Of the Class 1 MELT hours, how many are spent behind the wheel?
- 47 hours
- 57 hours
- 30 hours
- 17.5 hours
In a train, the rear trailer starts to fishtail. What does SGI recommend?
- Brake hard with the foot valve and steer away from the swing
- Steer sharply against the swing
- Lightly apply trailer brakes and add power
- Release power and coast to a stop
What vehicle must you bring for a Class 1 road test?
- A school bus with air brakes
- A three-axle power unit and a 48 ft or longer trailer
- A two-axle truck towing any trailer heavier than 4,600 kg
- A tandem tractor without a trailer
With air ride suspension, what do you do with the tractor suspension as you back under the trailer?
- Dump it and leave it down while driving away from the yard
- Leave it unchanged the whole time
- Dump it, then restore normal height
- Raise it to the highest setting first
Reflective tape along each side of a trailer must cover at least how much of its length?
- 100%
- 25%
- 75%
- 50%
FAQ
SGI Class 1 practice test: common questions
How many questions are on the SGI Class 1 test?
The Class 1 paper has 20 questions. A Class 1 applicant writes six papers in total, 105 questions, and the air brake paper adds another 18.
Is MELT required for Class 1 in Saskatchewan?
Yes. Mandatory Entry-Level Training of at least 121.5 hours must be completed before you can schedule the Class 1 road test. Your training school updates your SGI file.
What vehicle do I need for the Class 1 road test?
A three-axle power unit and a trailer of at least 48 ft, and you must be accompanied to the test site by a driver licensed for that class.
Keep practising
- SGI Class 4 practice test50 original practice questions for SGI's Class 4 paper: driver condition, following distance, braking, trip inspections, taxis and emergency vehicles. Free, with handbook pages.
- SGI Class 3 practice test40 practice questions for SGI's Class 3 paper: weights and dimensions, off-tracking and turns, loads and securement, bills of lading and dangerous goods.
- SGI Class 2 practice testFree practice questions for SGI's 15-question Class 2 paper: bus operation, passenger safety, railway crossings, school buses and the Class 2 trip inspection.
- SGI air brake test50 practice questions for SGI's 18-question air brake paper: components, governor pressures, dual circuits, spring brakes, tractor-trailer systems and adjustment.
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Practice by topic
- Licence classes, endorsements and examsWhat Class 1, 2, 3 and 4 licences allow, novice-driver limits, A, G and S endorsements, learner endorsements, the knowledge papers each class writes, Class 1 MELT and commercial medical standards.
- Driver condition, speed and following distanceDistraction, fatigue, alcohol and drugs, night vision and glare, the six driving conditions, traffic tempo, the time-based following count for long vehicles, tailgaters, intersections, railway crossings and the danger zone.
- Braking, passing, parking and backingSmooth stops, downgrades and retarders, combination braking, ABS warning lights, passing and being passed, curves, gear shifting, mirrors, parking on grades, warning devices for stopped vehicles, and safe backing.
- Tires, fire safety, fuel efficiency and winter drivingTire pressure and heat, tire matching, carbon monoxide, fire prevention and extinguishers, flares, fuel-saving habits and idling, plus the essential winter checks and the six hazards of winter driving.
- Vehicle condition and trip inspectionsThe PMVI program and inspection decals, who needs a daily trip inspection, Schedules 1 to 3, minor and major defects, the trip inspection report, the circle check order, brake response tests, en route and post-trip checks, and lighting.
- Taxis, ambulances, emergency and tow vehiclesWhat Class 4 covers for hire, criminal record checks and the T restriction, emergency vehicle rules and the duties of other drivers, slowing to 60 km/h, tow truck lights and taxi driving practices.
- Vehicle weights and dimensionsLegal length, width and height limits, A, B and C trains, axle definitions, overheight and power lines, red flags, clearance and amber lights, weight systems, spring road bans, permits and weigh scales.
- Truck handling: off-tracking, turns and turn-aboutsTurning radius and off-track, positioning for curves, left and right turns with a long unit, steering a semi-trailer backward, U-turns and the highway three-point and two-point turn-abouts.
- Loads, cargo securement and bills of ladingWeight distribution on trucks and trailers, securing and covering loads, overhang flags and lights, special cargos and livestock, prohibited shipments and what a bill of lading must contain.
- Transporting dangerous goodsReporting duties, TDG training certificates, consignor, carrier and consignee responsibilities, the nine hazard classes, labels, placards and UN numbers, routes and where the shipping document goes.
- Buses and passenger safetyClass 2 buses, loading zones, bus turns and leaving the curb, passenger precautions, railway crossings with passengers, standing passengers, refusing passage and the Class 2 bus trip inspection.
- School buses and the S endorsementWho may drive a school bus, re-testing every five years, safety lights and stop arm distances, what a school bus driver must and must not do, railway crossing steps, loading and unloading students.
- Coupling, uncoupling and trainsCoupling and uncoupling a tractor-trailer with air ride suspension step by step, tug tests, landing gear, hooking up a pup-train and converter dolly, safety chains, draw-bar rules and breakaway brakes.
- Tractor-trailer operation and the Class 1 licenceWhat a Class 1 licence covers, MELT training hours, the Class 1 road and trip inspection test, fifth-wheel checks, combination braking, jackknifing, offset and alley dock backing, and heavy trailers.
- Air brakes: who needs the A endorsement and braking principlesWhen the A endorsement is required, heat, friction and traction, how weight and speed change braking power, leverage and air pressure, and the three parts of stopping distance.
- Air brake components and system operationCompressor and governor pressures, reservoirs and draining, foot valve, brake chambers, S-cam brakes and disc brakes, safety valve, check valves, gauges, relay and quick-release valves, low air warning, ratio valve and air dryer.
- Dual-circuit systems and spring brakesPrimary and secondary circuits, what happens when one fails, spring-brake chambers, parking-brake valves and the pressures at which spring brakes drag and apply, compounding, blended air, the modulator valve and caging.
- Tractor and trailer air systemsThe tractor protection system, trailer-supply valve, supply and service lines, gladhands, the hand valve, relay emergency valve, breakaways and line ruptures, bobtail valve and trailer spring brakes.
- Brake adjustment and air brake pre-trip testsWhy poor adjustment causes brake failure, push rod stroke limits, manual and automatic slack adjusters, the hammer test, service tests, steep downgrade checks, and pre-trip air tests for single and combination units.