49.14. Indicate the method for determining the cause of a sudden increase in steering wheel effort.
UAВкажіть метод визначення причини різкого збільшення зусилля на кермовому колесі.
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This is an exam question from the Traffic Rules of Ukraine concerning road safety through the technical condition of the vehicle: a sudden “stiff steering wheel” sharply worsens controllability and can lead to a dangerous situation on the road. According to the traffic rules, the driver is obliged to check the technical condition of the vehicle before departure and while driving (point 2.3), as well as not to operate the car if there are steering system malfunctions (section 31, in particular 31.4.1). Therefore, the theoretical exam tests understanding of basic diagnostic methods that actually help determine the cause of the problem.
The question tests the section of the Traffic Rules about the technical condition of vehicles and their equipment, as well as the logic of proper inspection of the steering system and power steering. The correct approach involves a step-by-step check of the power steering system: first an inspection (level and condition of the power steering fluid, tightness, hoses, drive belt, traces of leaks, unusual noises; for electric power steering — condition of power supply, fuses, contacts), and then checking operating parameters, in particular measuring the working pressure in the hydraulic booster. Only the combination of inspection and measurement allows you to distinguish, for example, a leak or air ingress from a drop in pump performance or valve problems.
Analysis of answer options in the exam format: visual inspection alone is sometimes insufficient, because the system may look intact but not generate the required pressure; at the same time, measuring pressure alone without an initial inspection will not reveal obvious causes such as a leak or incorrect fluid level. “Diagnosis while driving” can give general impressions (when the steering becomes heavier, whether it depends on engine speed), but is not a reliable method for determining the cause and does not replace checking components and parameters. Therefore, the correct logic for this exam question from the traffic rules is a comprehensive check: inspection of elements and measurement of working pressure.
Clause 2.3 (a)
“To ensure road safety, the driver is obliged to: a) before driving, check and ensure the technical serviceability and completeness of the vehicle…”
Application to the question: a sudden increase in steering effort is a sign of a possible malfunction of the steering system/power steering, so the cause should be determined by checking the technical condition of the relevant components.
Clause 2.3 (b)
“To ensure road safety, the driver is obliged to: b) while driving, monitor the technical condition of the vehicle…”
Application to the question: if the “steering becomes stiff” while driving, the driver must assess the technical condition (by diagnostics) and take measures not to continue driving with a potentially dangerous malfunction.
Clause 31.4 (general provision)
“Operation of vehicles is prohibited under the law if the following technical malfunctions and conditions are present:”
Application to the question: a sudden increase in steering effort may correspond to malfunctions from the list in section 31.4, therefore it is necessary to determine the cause (diagnose) to check whether a prohibition on operation has occurred.
Clause 31.4.1 — 31 “Technical condition of vehicles and their equipment”, 31.4 “Technical malfunctions and conditions under which operation is prohibited”, 31.4.1 “Steering”
The provisions of this subclause establish that operation is prohibited in case of steering malfunctions, in particular (according to the requirements of the Traffic Rules) when:
— the permissible total steering play is exceeded;
— there are malfunctions/damages to the steering drive/mechanism components (unintended play not provided by the design, unreliable connections, etc.);
— the power steering, provided by the design, does not work (or there are malfunctions that significantly impair controllability).
Application to the question: that is why the cause of “stiff steering” should be determined by practical diagnostic methods (inspection/checking of components and checking the parameters of the power steering/mechanism), to establish the presence of a malfunction from the list in 31.4.1.
That is, the correct answer is “Options 1 and 2.”, given that according to the Traffic Rules, the driver is obliged to monitor the technical condition of the vehicle (clause 2.3) and not to operate the vehicle if there are malfunctions of the steering/power steering (clauses 31.4, 31.4.1), therefore the cause of a sudden increase in steering effort is determined precisely by a comprehensive check (combination of the prescribed diagnostic methods).
When the effort on the steering wheel suddenly increases, it is a sign of a malfunction in the steering system or the power steering unit. For the driver, this is critical, as the vehicle's handling changes and the risk of losing control increases. Therefore, the cause should not be determined "by eye," but by a step-by-step inspection of the most likely sources of the problem.
The first step in such diagnostics is related to the power steering. If a hydraulic power steering system is installed, it is logical to first check the level and condition of the working fluid and the system's tightness: a drop in fluid level due to a leak or air entering the system often immediately makes the steering "stiff." Indirect signs may include unusual noises from the pump, foam, or a change in the appearance of the fluid. If the vehicle has an electric power steering system, instead of fluid, the electrical supply and the condition of the electrical components (fuses, contacts, presence of errors) are checked, since a failure of the electric power steering also manifests as a sudden increase in steering effort.
The second step concerns the mechanical part of the steering system and related components. Even if the power steering is working properly, the steering can become heavy due to jamming of the steering mechanism, problems in the tie rod joints, suspension elements, or due to misalignment of the wheels after an impact. Such causes are usually detected during inspection and checking for play/friction in the connections, as well as assessing the condition of the wheels and tires (for example, incorrect tire pressure also affects the steering effort when turning). That is why diagnostics should include both checking the power steering and inspecting the steering mechanisms.
Thus, the correct answer is "Options 1 and 2," since the cause of a sudden increase in steering effort is determined by sequentially checking the power steering (hydraulic or electric) and the condition of the mechanical elements of the steering system and suspension.