53.20. 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 exam question from the Traffic Rules of Ukraine concerns road safety through the technical serviceability of the steering system. A sudden increase in steering effort is a dangerous sign: the vehicle responds worse to the driver's actions, and the risk of losing control increases, especially during maneuvers. That is why the traffic rules require checking the technical condition before driving (point 2.3) and prohibit operating a vehicle with steering or power steering malfunctions (points 31.4 and 31.4.1).
In essence, this question tests the section of the Traffic Rules on the technical condition and operation of vehicles, as well as the practical logic of diagnostics needed for the theoretical exam. The idea is simple: the cause of "heavy steering" is determined by objective methods, not guesses. First, a check is performed of what can be quickly seen: fluid level and possible leaks, condition of the pump drive belt, connections and joints, damage or jamming of components. Next, the operability of the power steering system is checked by measuring the working pressure, which allows confirmation or exclusion of pump failure, valve mechanism issues, or problems in the hydraulic system.
When evaluating the answer options, visual inspection is a basic and mandatory step, as the cause is often found in leaks, a broken belt, or mechanical damage. Measuring the pressure in the power steering system provides an accurate diagnostic result and helps distinguish a hydraulic problem from mechanical sticking. In contrast, "diagnosis while driving" can only indicate symptoms but does not establish the cause and is not a reliable method, so in the context of the exam question from the traffic rules, the correct approach is a combination of inspection and measurement-based checks.
Clause 2.3 (subclause "a")
The driver is obliged: before departure, to check and ensure the technical serviceability and completeness of the vehicle, as well as the correct placement and securing of the cargo.
Clause 2.3 (subclause "b")
The driver is obliged: in the event of technical malfunctions on the road, with which, according to these Rules, the operation of vehicles is prohibited, 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 measures.
Clause 31.1
The technical condition of vehicles and their equipment must comply with the requirements of standards related to road safety, technical operation rules, and other regulatory documents.
Clause 31.4
The operation of vehicles is prohibited under the law if there are technical malfunctions and non-compliance with the requirements specified in these Rules (including malfunctions of the steering system).
Clause 31.4.1 (steering malfunctions)
The operation of vehicles is prohibited if: the total steering play exceeds the established norms; there is damage or unintended movement of steering components and assemblies; the power steering, provided by the vehicle's design, does not work.
(Application to the question: a sharp increase in steering effort is a typical sign of malfunction/failure of the power steering or jamming of steering components, i.e., a condition that may fall under the prohibition of operation and requires inspection/diagnostics.)
That is, the correct answer is "Options 1 and 2.", given that according to the Traffic Rules, the driver is obliged to ensure the technical serviceability of the vehicle (clause 2.3) and is not allowed to operate a vehicle with steering/power steering malfunctions (clauses 31.4, 31.4.1), and determining the cause of such a symptom primarily involves checking the technical condition (visual inspection and control/measuring the operability of components).
A sudden increase in steering effort means that the steering system or the power assist has stopped functioning normally. In such a situation, the driver should not guess the cause “by ear,” but determine it through checks that provide objective results. In the theoretical exam, the “method of determining the cause” refers to practical diagnostic methods, not general assumptions.
The first logical step is to inspect and check the obvious things that most often cause a sudden “heavy” steering wheel. This includes checking the level of working fluid and possible leaks in the power steering, the condition of the pump drive belt (if present), as well as the condition of the steering rods, joints, and front suspension elements for jamming or mechanical damage. This also includes checking tire pressure, as a significantly deflated tire also sharply increases steering resistance. Such an approach meets the Traffic Rules requirement not to operate a vehicle with dangerous malfunctions and to check the technical condition, particularly the steering system, before driving.
The second correct method is a measurement check of the effort, that is, determining the friction force or resistance in the steering mechanisms using a device (dynamometer). It is the measurement that allows you to distinguish whether the “heaviness” of the steering is caused, for example, by jamming in the rack/joints (mechanical friction increases), or by the lack of proper assistance from the power assist (resistance changes due to pump, valve mechanism, or electric assist malfunction). That is, it is not just an inspection, but confirmation of the cause with a specific indicator.
Other approaches such as “determining by feel while driving” are not considered a method of establishing the cause: they can only suggest a direction for the search, but do not confirm the malfunction and are not reliable diagnostics. Therefore, only those options that involve checking the condition of components and/or measuring the effort are considered correct.
Thus, the correct answer is “Options 1 and 2,” since the cause of a sudden increase in steering effort is determined by inspecting the steering elements and checks (level/sealing, condition of drives and joints), as well as by measuring the effort (friction force) in the mechanisms.