If the feed pump for an auxiliary boiler fails to deliver the feed water to the boiler， the cause maybe （）.
B
举一反三
- Before an auxiliary boiler is shutdown for an extended period of time， the water in the boiler should have a pH value of （）.
- In an auxiliary boiler steam and water system， the highest pressure will be in the （）.
- The concentration of total dissolved solids in the water of an auxiliary boiler can increase as a result of （）.
- The purpose of the safety relief valves installed on an auxiliary boiler is to （）.
- The water wall of drum boiler mainly absorbs the radiation heat of high temperature flame in the boiler and generates steam (). A: Right B: Wrong
内容
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All visitors are asked _____ the animals in the Zoo. A: to not feed B: not feed to C: to feed not D: not to feed
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Which of the following equipment is not a traditional anti pollution equipment?_____ A: Ballast water treatment unit B: Exhaust gas boiler C: Oily water separator D: Incinerator
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A SECONDARY function of a waste heat boiler is to （）.
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()enables water to be blown down or emptied from the boiler A: scum valve B: soot blower C: blow-down valve D: vent cock
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Which of the following is not a primary product from insect farms? A: Insect grease as fuel material B: Insect protein as animal feed C: Feed residue as plant fertilizer D: Waste water for agricultural irrigation