举一反三
- If the feed pump for an auxiliary boiler fails to deliver the feed water to the boiler， the cause maybe （）.
- Before an auxiliary boiler is shutdown for an extended period of time， the water in the boiler should have a pH value of （）.
- Water evaporates or steam condenses at the saturation temperature, which depends upon the pressure, the higher the pressure _____ the saturation temperature. A: the more B: the highe C: the lowe D: the highest
- The concentration of total dissolved solids in the water of an auxiliary boiler can increase as a result of （）.
- 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
- 0
The highest pressure in any closed diesel engine freshwater cooling system is at the （）.
- 1
The purpose of the safety relief valves installed on an auxiliary boiler is to （）.
- 2
3. The three-phase point of water is a temperature and pressure condition under which water, ice and steam can coexist. The corresponding temperature is 0.01℃. Under this temperature, the external pressure of water is（ ） A: 101.325kPa B: 0.6106kPa C: 100kPa D: 1000kPa
- 3
Which one is not the major facility of water injection station: A: high-pressure pump system for improving injection pressure B: Christmas Tree C: flowmeter for measuring water rate D: the surface network for flowing in and out
- 4
The()is fitted in the steam supply line and is usually of the<br/>non-return type. A: main steam stop valve B: auxiliary steam stop valve C: feed check or control valve D: blow down valve