What are the causes of brake failure when going downhill in Subject 4?
2 Answers
Subject 4 downhill brake failure can utilize escape lanes to decelerate. Relevant information about Subject 4 is as follows: 1. Exam Content: The main contents include safe and civilized driving operation requirements, safe driving knowledge under adverse weather and complex road conditions, emergency handling methods for situations like tire blowouts, and post-traffic accident handling knowledge. Depending on the type of driver's license being tested, 50 questions are proportionally selected from the corresponding Subject 4 question bank. For car licenses, questions are selected from 1240, and for large vehicle licenses, from 1235, with each question worth 2 points. The exam duration is 45 minutes, and making mistakes totaling 12 points (6 questions) will terminate the exam. The question types include true/false questions (1-20), single-choice questions (20-40), and multiple-choice questions (41-50). Exam questions include picture-based questions, scenario recognition questions, and text-based questions. 2. Retake Instructions: Failing Subject 4 does not require retaking previously passed subjects (Subject 1, Subject 2, Subject 3), and candidates can schedule a retake on their own without additional fees. There are no scheduling restrictions for the safe and civilized driving theory test, but the driving skill test permit is valid for three years. If the applicant fails to complete the exams within the validity period, the results of any passed subjects will be voided.
I have experienced brake failure several times when driving down steep slopes, mainly due to brake system overheating causing brake fade. Continuously pressing the brakes can cause the temperature of the brake discs and pads to skyrocket, reducing friction effectiveness. Another common issue is insufficient or leaking brake fluid, where the hydraulic system cannot transmit sufficient pressure. Additionally, ABS malfunctions or electrical circuit problems, as well as incorrect sensor signals, can also affect brake response. It is recommended to use engine braking in combination with lower gears during long descents to reduce reliance on the brakes. Regularly checking the brake fluid level and brake pad thickness can prevent most risks. Never panic and attempt to slam on the brakes when experiencing brake failure.