Daily Safety Technology Quiz (Single-choice Question) (2016.8.17)
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1. Before the maintenance of chemical processing units, flammable, explosive, toxic, and harmful gases present in all equipment within the maintenance area must be removed. If the density of the displacing medium is greater than that of the medium being displaced, the displacing medium should be fed in through the ____ of the equipment. A. Lowest point B. Highest point C. Upper half D. Lower half 2. After a chemical plant is shut down, the deposits of combustible materials inside the equipment can be removed by manual scraping. The ____ tool should be used for cleanup tasks. A, copper or wood B, copper or iron C, iron or wood D, iron or aluminum A;A
1.A. ---------2、A
1. Before the maintenance of chemical processing units, flammable, explosive, toxic, and harmful gases present in all equipment within the maintenance area must be removed. If the density of the displacement medium is greater than that of the medium to be displaced, the displacement medium should be fed in through the __A__ of the equipment. A. Lowest point B. Highest point C. Upper half D. Lower half 2. After a chemical plant is shut down, the deposits of combustible substances inside the equipment can be removed by manual scraping. The __A__ tool should be used for cleanup tasks. A、Copper or wood B、Copper or iron C、Iron or wood D、Iron or aluminum