All questions in this section (Combination Vehicles) are listed below. If you click on a question it will show you the possible answers that you might be asked in the DKT theory test, plus the correct answer and an explanation if necessary.

• Look at the diagram. The diagram shows a trailer with a tandem axle fitted with 8 standard tyres. The maximum statutory axle load is:
• Look at the diagram. The diagram shows a trailer with a tri-axle fitted with 12 standard tyres. The maximum statutory axle load is:
• Speed limiters for road trains are required to be set for what maximum speed capability?
• A B-Double must be speed limited so that it has a maximum road speed capability of:
• What is the maximum allowable width of a B-Double?
• What sign must be displayed to the rear of a B-Double?
• Where must a 'ROAD TRAIN' sign be displayed on a road train combination?
• Can a 'Road Train' sign be displayed on vehicles that are not coupled together as a road train?
• Must all units in a road train combination be registered?
• Which of the following is true when you are coupling a vehicle and trailer?
• A B-Double is:
• A Road train is:
• A road train is a truck hauling how many trailers?
• What sign must be fitted to the back of a B-double?
• Vehicle monitoring device records for B-Doubles must be retained for at least how long?