48.59. How should a jack be correctly positioned?
UAЯк правильно встановлюється домкрат?
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This exam question focuses on safety during a forced stop and performing work with the vehicle on the road. Proper jacking directly affects the stability of the car, the risk of it shifting, body damage, or injury to people. Therefore, in the context of the Traffic Rules of Ukraine, it is related to the safe operation of the vehicle during troubleshooting, in particular, wheel replacement.
The question tests the understanding of the principles of technically safe actions by the driver, which follow from the requirements of the traffic rules regarding the technical condition and operation of the car: clause 2.3 (the driver's duty to ensure proper condition) and clause 31.1 (compliance with the rules of technical operation and the manufacturer's instructions). Although there is no direct provision in the Traffic Rules about the jacking point, the theoretical exam includes the basic logic: the jack is placed at the designated support point on the body or frame so that it is as close as possible to the wheel being lifted, as this reduces the "lever," misalignment, and the likelihood of the jack slipping.
The option where the jack is placed as close as possible to the hub is correct: it provides the most stable lift and puts less stress on the underbody elements. On passenger cars, this is usually the reinforced sill stiffener or another designated jacking point, and on body-on-frame SUVs — the frame or permissible suspension elements, but still as close as possible to the wheel. The alternative of placing it "as far as possible" increases the risk of the car rocking, the jack slipping, and structural damage, so it does not correspond to safe practice as checked by the traffic rules within this exam ticket.
Traffic Rules of Ukraine — there is no direct rule regarding the place for installing the jack
The Traffic Rules of Ukraine do not contain clauses that directly specify where exactly on the body/frame the jack should be installed (this is regulated by the operating manual (guide) of the specific vehicle and the rules for safe work performance). Within the framework of the Traffic Rules, this issue checks the general obligation of the driver to ensure safe operation and the technically sound condition of the vehicle when eliminating a malfunction (in particular, when changing a wheel on the road).
Clause 2.3 (driver's duties regarding the technical condition of the vehicle)
"To ensure road safety, the driver is obliged to: a) before departure, check and ensure the technical soundness and completeness of the vehicle; ..."
Explanation of application: correct installation of the jack during wheel replacement is part of the safe elimination of a malfunction and the prevention of danger due to improper actions with the vehicle.
Clause 31.1 (requirements for the technical condition and equipment of vehicles)
"The technical condition of vehicles and their equipment must comply with the requirements of standards related to road safety, environmental protection, as well as technical operation rules and manufacturers' instructions."
Explanation of application: since the Traffic Rules refer to the manufacturer's instructions for operation, the place for installing the jack is determined precisely by the "regular jacking points" (as a rule, as close as possible to the corresponding wheel).
That is, the correct answer is "As close as possible to the wheel hub," given that the Traffic Rules do not establish a specific jacking point, but require the driver to ensure safe operation and to act according to the manufacturer's instructions, and the regular jacking points are located as close as possible to the wheel.
When changing a wheel, the jack must support the weight of the car without tilting or shifting. Therefore, it is installed at a specially designated support point on the body or frame, but always taking into account the main principle: the lifting point should be as close as possible to the wheel being raised.
The logic is simple: the closer the jack is to the wheel hub, the shorter the lever between the lifting point and the wheel. This reduces the load on the body elements, lowers the risk of the car tilting during lifting, and makes the setup more stable. If the jack is placed far from the wheel, the car may "rock" during lifting, increasing the chance of the jack slipping or damaging the underbody components.
On passenger cars (sedan, hatchback), the jack is usually placed under the reinforced sill or another designated jacking point. These places are structurally designed to handle the load and are located near the wheels to ensure safe lifting without deformation.
On body-on-frame vehicles or SUVs, the support point is more often chosen on the frame or on suspension components that allow lifting. Here, the same approach applies: choose the most reliable point closest to the required wheel to minimize tilting and load.
Therefore, the correct answer is "As close as possible to the wheel hub," since this ensures the most stable lift without unnecessary leverage, tilting, or risk of the jack slipping.