53.2. Choose the correct answer.
UAВиберіть правильну відповідь.
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This exam question from the Traffic Rules of Ukraine concerns road safety in relation to the technical condition of the vehicle, specifically the serviceability of the braking system. In the theoretical exam, such tasks check whether the driver understands that even a “minor saving” on brake maintenance can lead to dangerous vehicle behavior: pulling to the side during braking, loss of stability, and increased braking distance.
In essence, this question checks the requirements of the section of the Traffic Rules regarding the driver’s duty to ensure the technical serviceability of the vehicle before driving (item 2.3) and the provisions of section 31 “Technical condition of vehicles and their equipment,” which emphasizes compliance with standards and proper brake efficiency (specifically 31.1 and 31.4.1). The logic is simple: brakes must work symmetrically on the wheels of one axle; otherwise, the braking forces on the left and right will differ, which already contradicts the requirements for safe operation.
The analysis of the answer options comes down to maintenance practices, which directly affect compliance with the Traffic Rules. The statement about the need to check the pressure in the receivers after replacing the brake pads is not a universal rule for all vehicles and does not solve the key issue of this task: the difference in braking forces on the left and right wheels of the axle. The idea of swapping friction linings in case of uneven wear is incorrect, as it does not eliminate the causes of wear and may worsen braking predictability. Instead, the correct approach in the context of the traffic rules and technical condition requirements is to replace the pads in pairs on one axle (both front or both rear) to ensure even braking, stable handling, and compliance with the regulatory brake efficiency.
Clause 2.3 (subclause "a")
To ensure road safety, the driver is obliged: "before driving, to check and ensure the technical serviceability and completeness of the vehicle...".
Brief application: the question checks understanding that the braking system must be technically serviceable; replacing brake pads only on one side of the axle may lead to uneven braking, i.e., in fact, to an improper technical condition of the brakes.
Clause 31.1 — 31 "Technical condition of vehicles and their equipment"
"The technical condition of vehicles and their equipment must comply with the requirements of standards relating to road safety, rules of technical operation, instructions of manufacturing enterprises, and other regulatory and technical documentation."
Brief application: the requirement to comply with standards/regulations and manufacturer instructions also covers maintaining uniform and effective brake operation (in particular, by replacing pads in pairs on an axle as a typical requirement/practice to ensure equal braking characteristics of the wheels).
Clause 31.4.1 — 31 "Technical condition of vehicles and their equipment", 31.4 "Operation is prohibited...", 31.4.1 "Braking systems"
"Operation of vehicles is prohibited under the law if the following technical malfunctions and non-compliance with standards are present: ... 31.4.1. Braking systems: the service braking system does not provide the established braking efficiency...".
Brief application: uneven condition of the pads on the left/right wheel of one axle can lead to deterioration of the efficiency and uniformity of braking (up to non-compliance with standards), which is directly related to the grounds on which vehicle operation is prohibited.
That is, the correct answer is "When replacing brake pads on one side, you must also replace the pads on the other side," given that according to the definition of the Traffic Rules, the driver is obliged to ensure the technical serviceability of the vehicle, and the braking system must provide regulatory efficiency and uniformity of braking without a dangerous difference in braking forces on the wheels of one axle.
The braking system must operate symmetrically: when pressing the pedal, the vehicle should slow down evenly, without pulling to one side. The Traffic Rules establish the general obligation of the driver to ensure the vehicle is in technically sound condition, and the braking system is one of the key elements of traffic safety.
If you replace the brake pads on only one side of the axle, there will be a difference in thickness and working properties of the friction material between the left and right sides. As a result, one side will brake more effectively, while the other will be weaker. In practice, this means that during sudden braking, the car may “pull” to one side, increasing the risk of losing stability, and on a slippery road, this difference is even more dangerous.
For the driver, this means a simple rule: even if the pads on the other wheel of the axle seem “still usable,” their remaining life and braking characteristics will no longer match the new ones. In addition to impaired handling, uneven brake operation often causes extraneous noises, vibrations, and accelerated wear of parts, because the load is distributed incorrectly.
Therefore, the correct practice is to replace the pads in pairs on one axle: either both front or both rear. This ensures equal braking force on the left and right and meets the requirement for operating a technically sound and safe vehicle.
Thus, the correct answer is: "When replacing brake pads on one side, you must also replace the pads on the other side," because paired replacement on the axle ensures even braking and stable vehicle control.