High-frequency test points for First-Class Constructor in Mechanical and Electrical Engineering: Building Intelligence Projects
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1. System installation ✅ Key points: Sensor installation locations (avoiding heat sources, vibrations, and strong magnetic fields); requirements for signal cable routing (shielding, grounding, and connector techniques). 💡 Mnemonic: Ensure precise sensor placement; use shielded cables to prevent interference
📌 2025 First-Class Constructor Mechanical and Electrical Real Exam (Single Choice) Question: Passive infrared detectors in intrusion alarm systems ( ). A. Can be installed facing the direction of the light. B. Cannot be installed on objects prone to vibration. C. Can be installed facing an air conditioning vent. D. The typical installation height is 1.5–1.8 meters
Answer: B 🔍 Explanation: Passive infrared detectors should not be installed on objects that are in motion, nor should they face heat sources or the air outlets of air conditioners. The typical installation height is 2.2 to 2.7 meters.
2. System debugging ✅ Test point: Comprehensive testing of the water supply/recycled water monitoring system； 50% of drains shall be randomly inspected, with a minimum of 5 sets ； 💡 Mnemonic: Full inspection for water supply, half for drainage
📌 2024 First-Class Constructor Mechanical and Electrical Real Exam (Single Choice) Question: A certain project includes 6 water supply monitoring systems; what is the minimum number of tests that need to be conducted? A. 2 sets B. 3 sets C. 5 sets D. 6 sets
Answer: D 🔍 Explanation: The water supply and reclaimed water monitoring systems should all be inspected. 50% of the drainage monitoring systems should be sampled, with a minimum of 5 sets; if the total number is less than 5, all of them must be tested.
For reference: There are two possible orders for the subjects that need to be studied for the First-Class Constructor exam. One is to start with the more difficult subjects first, namely Management → Practice → Economics → Regulations. In this approach, one first tackles the more complex management and practical aspects that are closely related to each other, and once those are handled, dealing with economics and regulations becomes much easier. Another approach is to start with the easier tasks first: regulations → economics → management → practical applications. This is a gradual approach, making it difficult to feel discouraged when faced with difficulties. Each of the above has its own advantages and disadvantages.
The case-based questions in the Mechanical and Electrical Engineering section of the First-Class Constructor exam are indeed quite difficult; however, there are answering techniques that can help improve one’s score. The case analysis questions in the Mechanical and Electrical Engineering practice section of the First-Class Constructor exam are key points and difficulties in the test; candidates are usually required to conduct comprehensive analyses by integrating practical engineering knowledge, regulatory standards, and management principles.
Key scoring logic for case studies: points are awarded based on key points addressed, clear logic, and use of exact phrases from the textbook. When answering, one should first determine the nature of the issue, then present the relevant evidence, and finally outline the actions to take or the conclusion reached; colloquial language is not allowed.
1. Scoring based on keywords: Professional terms, standard figures, and fixed procedures mentioned in the textbook are key points for scoring. For instance, phrases like “leveling and alignment, grouting for fixation, dynamic load factor of 1.1, burial depth of 0.7m” must be written accurately; colloquial expressions should not be used as substitutes；
2. Answer in points: Even if the answers are short, use ①②③ so that examiners can quickly check each point and avoid missing any answers；