If the feed pump for an auxiliary boiler fails to deliver the feed water to the boiler， the cause maybe （）.
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