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單項(xiàng)選擇題

The abbreviation "TDS" about the potable water probably means （）.

A.total dissolved solids
B.temperature of distillation of sea water
C.total dissolved sodium
D.total delivery system

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單項(xiàng)選擇題

A condenser is a vessel in which（） is deprived of its latent heat of vaporization and so changed to its liquid state.

A.sea water
B.fresh water
C.vapour
D.gas

單項(xiàng)選擇題

In more recent years, （） heat exchangers have frequently been employed for jacket water and oil cooling.

A.shell and tube type
B.plate type
C.coil type
D.conical disc type

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