【Question 140】Boiler Foundation Questions (January 5)

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Please hide your replies; be cautious when posting, as edits are invalid! Those with different views on the provided answer keys can post discussions the next day. For multiple accounts under the same IP responding to participate, only the first response is valid. All participants receive 2 points as a reward. This round consists of multiple-choice questions, with 2 points for each question; 5 points are awarded for getting all questions correct. In principle, the top 50 respondents who answer within 48 hours will be graded. Please hide your replies; the method for doing this is: http://bbs.hcbbs.com/thread-492556-1-1.html 1. Which of the following statements about boiler injectors is incorrect? A. The higher the oil pressure, the more significant the improvement in atomization quality. B. There is a certain relationship between the nozzle diameter and atomization quality. C. The greater the rotation speed in the vortex chamber, the better the atomization quality. D. It is best to heat the fuel to a viscosity of Raymond No. 1 within about 60 seconds. 2. When the boiler is not in use temporarily and it is necessary to stop the fire while retaining steam, which of the following statements is incorrect? A. Switch to diesel fuel before shutting down the system.　　　　 B. Raise the water level to the high mark on the gauge at the time of shutdown. C. Drain waste water half an hour after shutdown. D. Light the fire intermittently during the pressure maintenance period to raise the steam pressure to the upper limit of the operating range. Reference answers: A, D