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The water in an auxiliary boiler should be chemically tested daily for alkalinity and（）

单选题
2022-01-04 01:37
A、soap hardness
B、nitrog encontent
C、chloride content
D、dissolved CO
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正确答案
C
试题解析
标签： 船舶电气与船舶安全
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The（） is fitted in pair one is the main valve, the other the auxiliary or standby.
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The water in an auxiliary boiler should be tested daily for （）.
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The water level showing in a boiler water gauge glass is usually ( ) duringworking.
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Who is in charge of the auxiliary boilers?（）
The correct procedure for giving an auxiliary boiler a bottom blow, is to begin（）
The procedures recommended for auxiliary boilers having high salinity include （）.
The water level in the gauge glass when a boiler is operating is （） when the boiler is shut down.
In an oily water separator the oil will travel （） to the oil collecting spaces.
In an auxiliary boiler steam and water system, the highest pressure will be in the （）.
The rate of heat transfer in a water-tube auxiliary boiler can be increased by （）.
The water in an auxiliary boiler should be tested daily for （）.
The water in an auxiliary boiler should be chemically tested daily for alkalinity and（）
Before an auxiliary boiler is shutdown for an extended period of time, the water in the boiler should have a pH value of （）.
The concentration of total dissolved solids in the water of an auxiliary boiler can increase as a result of （）.
When a boiler is operating, the water level in the gauge glass reads （） when the boiler is shut down.
The（）enables water to be blow down or emptied from the boilerIt may be used when partially or completely emptying the boiler.
Impurities from the boiler water surface can be removed through the （）.
If in doubt as to the true water level when a boiler is being oil-fired, you should （）.
Which of the following procedures decreases the total dissolved solids concentration in the water of an auxiliary boiler?（）
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