輪機英語船舶輔助機械章節(jié)練習(2017.12.19)

來源：考試資料網(wǎng)

1 The dew point of air is reached when the wet bulb temperature is （）.

2 If the head pressure of a reciprocating refrigeration compressor is excessive, （）.

3 All bilge suction must be fitted with suitable （）, which in the machinery space would be mud boxes positioned at floor-plate level for easy access.

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4 Attempts are made to eliminate axial thrust in centrifugal pump by （）.

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5 If a refrigeration system compressor crankcase is sweating, you should （）.

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6 A centrifugal pump may fail to deliver water when first started if the （）.

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7 Foaming of the oil in a refrigeration compressor crankcase is caused by （）.

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8 The boiling and condensation points of refrigerant mainly depend on the （） exerted upon it.

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9 The internal part of boiler should be cleaned by yard if found （）.

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10 The various pumps and lines are （） to some extent so that each pump can act as an alternative for another.

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