Before an auxiliary boiler is shutdown for an extended period of time， the water in the boiler should have a pH value of （）.
举一反三
- If the feed pump for an auxiliary boiler fails to deliver the feed water to the boiler， the cause maybe （）.
- 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 （）.
- 27.The furnace of a oil fired boiler should be ____ before the operating burner is№
- The purpose of the safety relief valves installed on an auxiliary boiler is to （）.