Before a lift truck drives into a transport trailer, what must be done to the trailer?
Forklift Operator: Docks, trailers, railcars and elevators
Securing trailers and railcars before you drive in, dock plates, jack stands, exhaust inside trailers, railway track rules and using a lift truck in an elevator.
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Study reference: Canadian lift truck safety guidance (Oct 2026), Ch. 8 Docks, trailers, railcars and elevators — Ontario lift truck guideline, Appendix III(b); CCOHS Forklift Trucks: Loading and Unloading
All 14 questions in this test
Every question and its answer choices. The correct answers and explanations appear when you take the test above.
Before a lift truck drives into a transport trailer, what must be done to the trailer?
- It must be emptied of every load before any lift truck enters
- It must be immobilized and secured against moving
- Its doors must be removed for better lighting
- It must be washed so the floor is not dusty
When may a lift truck be driven onto a freight elevator?
- Only on weekends when fewer workers are in the building
- Only if authorized and the elevator is designed to carry it
- Whenever the load is light enough for one person to lift
- Any time the elevator door is open and the car is empty
What must be true of a dock plate (bridge plate) before you drive over it?
- It is newer than the trailer it is placed against for loading today
- It is designed for the loaded truck's weight and firmly in place
- It is painted yellow on at least one of its sides
- It is wider than the trailer's rear door opening
How close to railway tracks may you park a lift truck?
- Directly beside the rail
- Anywhere, if the brake is on
- No closer than 1 m
- No closer than 3 m
Once a loaded lift truck is on the elevator, what should the operator do?
- Leave the truck running and ride the next elevator up
- Stay seated with the engine running and the forks partly raised
- Raise the load so it does not touch the elevator walls
- Set the brakes, lower the load, neutral, power off, get off
A railcar needs to be moved a few metres along the siding. May you push it with the lift truck?
- Yes, if a co-worker watches the coupling the whole time
- Yes, if the forks are lowered to the rail
- Yes, if the railcar is completely empty
- No, never push or tow railcars with a lift truck
While loading a trailer you notice a gap opening between the trailer and the dock. What should you do?
- Keep loading but only lighter pallets
- Drive faster over the gap so the wheels cross it
- Stop loading until the trailer is secured
- Fill the gap with a spare wooden pallet
Before entering an elevator with a lift truck, what should you confirm about its floor?
- It is covered with a rubber mat
- It has been mopped within the hour
- It is lower than the building floor
- It is level with the building floor
A trailer is parked at the dock without its tractor. What may be needed before a lift truck enters it?
- Nothing, because uncoupled trailers cannot move
- A jack stand to support the front of the trailer
- A ramp built from pallets under the rear wheels
- A second lift truck to hold the rear doors
What should you do when entering or leaving a trailer or bay?
- Switch to neutral
- Turn off the lights
- Raise the forks
- Sound the horn
Why should a propane lift truck not work inside a closed trailer for long periods?
- Propane trucks cannot reverse in trailers
- The trailer floor will melt from the heat
- Propane freezes inside trailers in summer
- Exhaust can build up without ventilation
Which steps help keep a trailer from rolling away from the dock?
- Set the brakes, chock the wheels and use a trailer restraint
- Keep the dock door half closed while loading it
- Park the trailer at a slight angle to the dock door
- Leave the trailer's engine running so the driver can react quickly
Why should the truck driver be asked to turn off the trailer's engine during loading?
- To reduce exhaust fumes and prevent movement
- To let the lift truck battery recharge
- To save fuel for the delivery company that owns the trailer
- Because the radio disturbs the operator
Before driving into a railcar, what should be set?
- The railcar doors fully closed for safety
- Only the lift truck's own parking brake
- Warning cones placed on the far side of the railcar
- Hand brakes, wheel blocks and the derailer
Docks, trailers, railcars and elevators: key rules to remember
Our summary of what the official handbook says on this topic, in our own words. Read it before or after the practice questions above, then check the original chapter. Read the official chapter ↗
Appendix III(b), loading trucks and railway cars
- Before driving into a truck, trailer or boxcar, loaded or not: make sure the vehicle is restrained against moving, the floor is strong and sound, lighting is adequate, and the dock or bridge plate is rated for the loaded lift truck and firmly in place.
- Support an uncoupled trailer with a jack stand where needed.
- Reg. 851 / guideline: a vehicle being entered by a lift truck must be immobilized and secured against accidental movement.
Loading and Unloading
- Set the trailer brakes, ask the driver to turn off the engine, chock the wheels and use a trailer restraint if there is one.
- Keep the driver clear of the area while the lift truck is moving; post signs warning not to move the vehicle.
- If the trailer is not coupled to a tractor, its landing gear or stabilizer must fully support it.
- Check roof clearance for the raised load and that the trailer deck can hold the truck plus load; inspect inside for holes, debris, spills and poor lighting.
- Dock plates must be in good condition, positioned, level, secured, rated and marked for weight; dock edges should be marked.
- Sound the horn when entering and leaving trailers; stop work if the trailer tilts, a gap opens at the dock, or steering becomes difficult.
- Do not run gas or propane trucks inside trailers for long periods without ventilation.
- Railcars: set hand brakes, wheel blocks and derailer before entering; cross tracks diagonally at designated places; never park within 3 m of tracks or inside railcars; never push or tow railcars or trucks, or open railcar doors with the forks.
Elevators
- Use a lift truck in an elevator only if authorized and the elevator is designed for it (capacity, clearance, ventilation).
- Make sure the elevator floor is level with the building floor; approach slowly and enter squarely.
- No other person rides with the loaded truck; set the brakes, lower the load, put the controls in neutral, shut off the power and get off the truck.
Study the Docks, trailers, railcars and elevators rules as flashcards →
Other topics
- Operator competence and the lawWho may drive a lift truck, what a competent person is, employer and worker duties, the right to refuse unsafe work, training records and retraining.
- Truck classes and the capacity plateThe seven lift truck classes, what the capacity (data) plate tells you, load charts, attachments and what happens to the rating when a truck is modified.
- Stability, load centre and tip-oversWhy a raised load makes the truck less stable, how speed, turns, grades and load position affect stability, counterweights, and what to do if the truck tips.
- Pre-use (circle) checksThe visual walk-around and the operational check with the key on: forks, chains, tires, fluids, battery or propane, brakes, horn, steering and lift controls, and reporting defects.
- Travelling and pedestrian safetySpeed, visibility, travelling in reverse, horns and mirrors, signallers, railway tracks, power lines, and traffic plans that keep pedestrians and lift trucks apart.
- Ramps, grades and surfacesWhich way the forks point on a ramp with and without a load, turning and lifting on slopes, uneven or slippery surfaces, and parking on an incline.
- Picking up, carrying and stacking loadsChecking weight and clearance, fork spacing and depth, tilting back, travel height, load backrest rules, pallets, stacking and placing loads.
- Lifting people on work platformsWhen a lift truck may raise a worker, platform and guardrail requirements, the half-capacity rule, test lifts, fall protection and staying at the controls.
- Parking, shutdown and unattended trucksThe shutdown sequence, what the law says about leaving a lift truck or a raised load unattended, chocking wheels and where not to park.
- Propane, fuel and battery chargingChanging propane cylinders, leak checks, carbon monoxide, refuelling gasoline equipment, charging lead-acid batteries, hydrogen gas and acid first aid.
- Maintenance, forks and recordsThe yearly load-capacity examination, inspection intervals, maintenance records, fork wear limits, who may repair forks and safe servicing practices.