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A comprehensive set of questions and answers related to tow truck operation and safety. It covers essential topics such as vehicle classifications, weight ratings, towing capacity, and equipment terminology. Valuable for individuals seeking to obtain a tow truck endorsement or those interested in learning about the technical aspects of towing.
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Tow Truck - ANSWER- A motor vehicle that tows or carries a disabled, illegally parked or abandoned vehicle. GVWR - ANSWER- Gross Vehicle Weight Rating GCVR - ANSWER- Gross Combination weight rating. The GVWR plus the GVWR of the vehicle being towed equals the GCVR. Light duty - ANSWER- GVWR of 8,600 to 10,000 pounds Medium Duty - ANSWER- GVWR of 10,001 to 26, Heavy duty - ANSWER- GVWR over 26,000 pounds Car carrier - ANSWER- A vehicle designed to transport 1 to 3 motor vehicles. Car carriers use a platform that is used to facilitate the operation of towing one or many vehicles. They are known also as flatbeds, Slideback, equipment transporters and rollbacks. Overloading - ANSWER- Overloading can cause undetected damage, weaken the equipment significantly and cause equipment failure which can result in injury or death. GAWR - ANSWER- Gross Axle Weight Rating which is used to describe the weight of a single axle or a combination of axles is designed to carry. Overhang - ANSWER- Overhang is measured from the center of the lift point to the center of the rear axle of the tow trucks. The safe towing capacity decreases when overhang increases. STC - ANSWER- Safe towing capacity - Defined as the amount of weight or load that does not cause more than a 50% loss of original unloaded front axle weight. Wheelbase - ANSWER- The distance from the centerline of the front axle to the centerline of the rear axle. The breaking strength rating - ANSWER- TBSR is established by the manufacturer as the maximum weight or load that new, unused equipment can bear under ideal laboratory conditions.
The weight load limit - ANSWER- The weight load limit - The maximum weight or load that equipment can bear under normal operating conditions. Boom - ANSWER- A structural member of a tow truck that extends from a mast to support the load and extend or lift a load free of the ground. Mast - ANSWER- The structure that houses the boom and winchs PTO - ANSWER- PTO - Power take off- A device that transmits engine power to auxiliary equipment - PTO is locates in cab. Cable - ANSWER- Steel wire rope Cable terminators - ANSWER- Cable is no stronger than its end attachment, or terminations. The terminations recommended for towing is swage. Thimble - ANSWER- Shield to protect the cable at the lock assembly. Wedge socket - ANSWER- A wedge socket is a device that cable is threaded through to form a loop. Sheaves - ANSWER- Pulleys Snatch block - ANSWER- Single or multi pulley system that is used to reduce line tension or change cable direction. Proof coil - ANSWER- "3" or "30" - Not heat treated - low grade - not recommended for towing. High test - ANSWER- "4" or "40" - not heat treated - not to be used or recovery work Transport - ANSWER- "7" or "70" - high quality - heat treated - used widely in the towing industry. Alloy - ANSWER- "8" or "80" - heat treated - strong - very expensive - The only material recommended by OSHA