Question

before using a jack, check the lifting capacity specified on a sticker, located on the lifting arm. never exceed the jack.
prevent the vehicle from rolling. this can be achieved by applying the parking brake or by placing chocks behind the wheels that are not being lifted.
always work on firm, level flooring (preferably concrete). this prevents the jack from sinking into the ground and the car from dropping off the jack. remove any debris, that could keep the wheels from rolling freely.
the jack support cup should be positioned under a solid point on the car body or chassis.
often the car manufacturer specifies designated lifting points. these lifting points are shown in the corresponding service information and/or vehicle owners manual. positioning the jack at a non - designated lift point is dangerous and could cause damage to the vehicle.
note: some vehicles are designed with lift points that require a special adapter to be used in conjunction with the floor jack.
why should you never place the floor jack under a vehicle without checking its position?
the vehicle might be jacked up quicker than expected, which leads to hazardous situations.
the jack support cup may be positioned at a place not designated as a safe lifting point.
the floor jack might be severely damaged and rendered useless.

Explanation:

The text emphasizes that car manufacturers specify designated lifting points and positioning the jack at a non - designated lift point is dangerous and could cause vehicle damage. Also, the jack support cup should be under a solid point on the car body or chassis. So not checking the position may lead to the jack support cup being at a non - safe lifting point. There is no mention of the vehicle being jacked up quicker or the floor jack being damaged in the context of position - checking.

Answer:

The jack support cup may be positioned at a place not designated as a safe lifting point.