53.12. How will a loss of tightness in the brake chamber on one side affect the vehicle during braking?
UAЯк позначиться на автомобілі порушення герметичності гальмівної камери з одного боку під час гальмування?
Question without image
This is an exam question from the Traffic Rules of Ukraine concerning road safety and the technical condition of the vehicle, specifically the operation of the braking system. During braking, the car must maintain stability and a straight trajectory, and any deviations in controllability are a dangerous sign of malfunction, which directly affects the braking distance and the risk of an accident.
The question tests knowledge of Section 31 "Technical condition of vehicles and their equipment," specifically the requirements of clause 31.4.1 regarding brake system malfunctions that prohibit operation (loss of airtightness in pneumatic or pneumohydraulic drive). It is also related to Section 2 "Duties and rights of drivers," since in the theoretical exam it is important to understand not only the signs of malfunction, but also the driver's duty to check the car before departure and act correctly when problems are detected on the road.
The logic of the answers is based on the physics of braking: if the brake chamber on one side loses airtightness, the pressure (or force) on that wheel will be lower, so the brakes will work unevenly. The option about the absence of consequences is incorrect, because the difference in braking forces is almost always noticeable in the behavior of the car. The symptom of hissing may occur as an accompanying sign of a leak, but it is not the main manifestation when pressing the pedal: the key effect for controllability is that the car deviates to the side where braking is more effective, and the driver has to steer to keep the lane.
Clause 31.4.1 — 31 “Technical condition of vehicles and their equipment” (malfunctions of braking systems that prohibit operation)
The operation of vehicles is prohibited according to legislation if, in particular, the braking systems: the tightness of the pneumatic or pneumatic-hydraulic brake drive is violated (as well as other brake system malfunctions specified in this clause).
Brief application to the question: violation of the tightness of the brake chamber on one side (air leakage) means that the braking force on the left/right will be different, which during braking manifests as the vehicle pulling to one side (due to uneven braking of the wheels).
Clause 2.3 (subclause “a”) — 2 “Duties and rights of drivers of motor vehicles”
To ensure road safety, the driver is obliged: before departure, to check and ensure the technical serviceability and completeness of the vehicle.
Brief application to the question: knowledge of the consequences of violation of the tightness of the brake drive/chamber is related to the driver’s duty to monitor the serviceability of the brakes, as such a malfunction directly affects stability and controllability during braking.
Clause 2.3 (subclause “ye”) — 2 “Duties and rights of drivers of motor vehicles”
To ensure road safety, the driver is obliged: in the event of technical malfunctions on the road that prohibit the operation of the vehicle, to take measures to eliminate them, and if this is not possible — to proceed by the shortest route to a parking or repair location, observing safety precautions.
Brief application to the question: if during movement the vehicle pulls to the side when braking (a sign of possible depressurization/malfunction of the brakes on one side), the driver must act in accordance with the requirements regarding malfunctions that prohibit operation.
That is, the correct answer is “The vehicle will be felt to pull to one side.”, given that according to the Traffic Rules, violation of the tightness of the pneumatic (pneumatic-hydraulic) brake drive is considered a dangerous malfunction of the braking system and causes uneven braking of the wheels on one side.
During braking, the vehicle should decelerate evenly, meaning the braking mechanisms on the left and right sides should generate approximately the same force. This is exactly what the brake system is designed for: to ensure the vehicle maintains straight-line movement and controllability.
If the brake chamber on one side loses its airtightness (for example, there is a leak or the chamber does not create the required pressure), then the brake on that wheel will either work less effectively or almost not at all. At the same time, the brake mechanism on the other side will remain functional and provide normal braking force.
Due to the difference in braking between the right and left sides, there is a difference in the forces acting on the vehicle: one side "brakes harder," while the other "rolls more freely." As a result, the vehicle begins to change its trajectory and is pulled toward the wheel where braking is more effective. In practice, the driver experiences this as the car pulling to one side when pressing the brakes and the need to steer to keep the vehicle in its lane.
Therefore, the correct answer is "The vehicle will be pulled to one side," because due to the loss of airtightness on one side, the braking force becomes uneven, and the vehicle deviates toward the side where the brakes work better.