48.85. How should a jack be properly positioned?
UAЯк правильно встановлювати домкрат?
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This exam question from the Traffic Rules of Ukraine concerns the safe operation of a vehicle during a forced stop (for example, to change a wheel) and reducing the risks of the vehicle overturning or shifting. Proper use of a jack directly affects road safety: an unstable lift can cause the car to fall, injure people, or create obstacles for other road users.
The question tests knowledge of the requirements of the sections of the Traffic Rules regarding the driver's duties before departure and during operation (item 2.3), as well as the rules for stopping and parking (item 15.12). The logic is simple: the jack is installed at a strong support point provided by the manufacturer, but so that it is as close as possible to the wheel being lifted. In passenger cars, this is usually a reinforced section of the sill or a stiffening rib; in SUVs and frame constructions, it is the frame or permitted elements near the corresponding wheel. The shorter the distance to the wheel, the smaller the load "lever" and the more stable the jack stands.
Analysis of answer options in the theoretical exam shows: placing the jack as far as possible from the wheel increases body skew and the likelihood of the support slipping, and the statement that the location does not matter ignores the manufacturer's instructions and basic principles of stability. That is why the traffic rules and the practice of safe roadside repair emphasize installing the jack at the standard jacking point next to the required wheel.
Clause 2.3 (subclause "b")
To ensure road safety, the driver is obliged to: b) before driving, check and ensure the technical serviceability and completeness of the vehicle, the correct placement and securing of cargo, as well as the compliance of external lighting devices with standard requirements.
Brief application: correct and safe use of the vehicle’s standard equipment (in particular, the jack) is part of ensuring safe operation and technical serviceability/completeness of the vehicle; the jack is installed at the manufacturer-designated points (usually near the corresponding wheel on reinforcement elements/stiffening ribs), which ensures stability during lifting.
Clause 15.12
During stopping and parking, the driver must take measures to ensure that the vehicle cannot move on its own and does not create obstacles for other road users.
Brief application: when changing a wheel (when the vehicle is actually in stop/parking mode), the driver must ensure the stability and immobility of the car; installing the jack as close as possible to the wheel (at the designated jacking point) reduces the load arm and the risk of shifting/tipping, which is directly related to the requirement to prevent spontaneous movement and the creation of danger.
That is, the correct answer is "As close as possible to the wheel," considering that according to the Traffic Rules, the driver is obliged to ensure safe operation (technical serviceability/completeness) and, during stopping/parking, take measures to prevent the vehicle from moving on its own, and installing the jack at the designated point near the wheel ensures stability and safety during lifting.
When changing a wheel, the jack must lift exactly the part of the vehicle that is closest to the lifting point. This is necessary so that the load is transferred correctly to the strong elements of the body or frame, and the vehicle remains stable and does not shift during lifting.
On passenger cars, the jack's support pad is usually placed at the designated lifting point on the sill, near the reinforcement rib (a specially reinforced area). Such points are located next to the front or rear wheel so that the jack lifts the minimum part of the body and does not create unnecessary distortion. If you lift at a point far from the wheel, the vehicle may "lean" to the side, and the jack may lose stability.
On vehicles with a frame or other construction (for example, many SUVs), the jack is placed under strong elements intended for lifting: the frame or suspension components allowed by the manufacturer. In these cases, the correct places are also as close as possible to the wheel that needs to be removed, so that the lifting is controlled and safe.
Thus, the general principle is the same: the jack is installed at the designated strong support point, but it is chosen so that it is as close as possible to the wheel being lifted. This reduces the risk of the vehicle shifting and ensures proper load distribution.
Therefore, the correct answer is "As close as possible to the wheel," since the jack must rest on a strong designated lifting point near the corresponding wheel to ensure vehicle stability and safe lifting.