NYC Tow Truck Endorsement Practice Exam

What is the purpose of a dolly in towing?

1. To enhance vehicle visibility

2. To support the leading end of a towed vehicle

3. To support the trailing end of a towed vehicle

4. To further stabilize the towing vehicle

The correct answer is: To support the trailing end of a towed vehicle

The purpose of a dolly in towing is to support the leading end of a towed vehicle. When a vehicle is being towed, especially if it is a front-wheel drive vehicle, the dolly is typically used to elevate the front wheels of the towed vehicle off the ground. This helps in reducing friction and wear on the tires of the towed vehicle while ensuring that its weight is appropriately distributed. Using a dolly also aids in preventing damage to drivetrain components since the rear wheels remain on the ground and free-rolling, which is essential for many towing situations. This configuration allows for safer and smoother towing, as the steering of the towed vehicle is maintained through the elevated front end, resulting in better maneuverability and control during the towing process. In this context, the answer about supporting the trailing end is incorrect because it misses the primary function of the dolly, which is to support the leading end of the vehicle, ensuring both safety and efficiency in towing operations.