The random test of intermediate maintenance must participate in the offline manual assessmentThere are a total of 9 syllabuses in the syllabus for facility maintenance, and the examiner will randomly select about 2 of them to ask questions, mainly for the replacement of components of fire-fighting facilities.
Candidates are to answer the questions of the random test center through oral description, and pay attention to the difficult content of maintenance in the random test content of intermediate maintenance, and the replacement of components of the system needs to replace many components, which has a certain difficulty when reciting and memorizing.
Each maintenance test center has its own answering skills, and it is easy and quick to memorize these answering skills.
The practical operation interface of the elimination test has been revised!The interaction is smooth and closer to the national examination. Mobile phones and computers can be practiced Xi, including theory and practical operations, and Xi can be practiced. The theory question bank has been simulated with real questions over the years, close to the national examination questions, and the practical operation must be operated according to the requirements of the syllabus!
9 random exam questions for fire protection facility maintenance:
Identification point 29: replacement of automatic fire alarm system components
Identification point 30: Replacement of wet dry sprinkler system components
Identification point 31: fire fighting**, emergency broadcasting system component replacement
Identification point 32: replacement of fire emergency lamps
Identification point 33: replacement of fire shutter components
Identification point 34: replacement of fire door components
Identification point 35: replacement of fire hydrant components
Identification point 36: maintenance of water-based fire extinguishers and dry powder fire extinguishers
Identification point 37: Replacement of smoke prevention and exhaust system components
About the key and difficult points in the maintenance of facilitiesReplacement of wet and dry sprinkler system components, candidates at this test center are easy to lose points, hear this question, and directly answer the question of using special tools to disassemble the sprinkler head, use special tools to disassemble the pressure switch, etc.
Note that before dismantling the water system, it is necessary to prepare spare parts with consistent specifications and models, and then close the valve to cut off the water, open the valve to drain the water, and then replace it when there is no pressure water in the pipe network.
The answer is mainly divided into three parts, and the specific dictation is as follows:
1. How to replace the sprinkler head of wet and dry automatic sprinkler system?
1) Check that the specifications, models and performance parameters of the replacement parts should match or be consistent with the parts to be replaced;
2) Close the control valve in front of the water flow indicator in the partition where the sprinkler head is located
3) The electrical control cabinet of the pump set is converted to "manual" state;
4) Open the fire partition, floor water test valve or end water test device to discharge the pipeline water storage;
5) Use a special wrench to disassemble and assemble the old and new nozzles;
6) Open the water flow indicator control valve, and gradually close the end of the water test device when the pipeline is filled with water and pressurized until there is no gas discharge at the end of the water test device
7) The electrical control cabinet of the pump set is converted to the "automatic" state.
2. How to replace the pressure switch of the alarm valve group of the wet automatic sprinkler system?
1) Check that the specifications, models and performance parameters of the replacement parts should match or be consistent with the parts to be replaced;
2) Convert the electrical control cabinet of the fire pump unit to "manual".
3) Close the alarm pipeline control valve and confirm that the alarm bell test valve is closed
4) Unscrew the screws, open the shell, disconnect the cable, remove the pressure switch, install and connect the wire correctly;
5) Open the alarm bell test valve and check the signal feedback of the fire alarm controller
6) Close the alarm bell test valve, discharge the remaining water, and open the alarm pipeline control valve
7) Convert the electrical control cabinet of the fire pump unit to the "automatic" state.
3. How to replace the disc sealing ring of the dry alarm valve?
1) Close all valves of the dry alarm valve group;
2) Open the water supply side drain valve and all auxiliary drain valves, discharge the remaining water, and replace the sealing ring;
3) Check the flexibility and reliability of the anti-reset locking mechanism
4) Close all open valves, reset the valve disc, and carry out bottom water filling and gas filling operations
5) Slowly open the control valve on the water supply side, and close the water discharge valve when there is water flowing out of the discharge valve
6) Reset the valves of each way, and the system will return to normal state.