輪機英語章節(jié)練習(2020.03.11)

來源：考試資料網(wǎng)

1 With a purely resistance load the voltage and current are in phase, giving a power factor of （）.

2 Improperly fitted piston rings in a diesel engine can cause（）

3 The space between cylinder liner and jacket is called （）.

4 Low compressor head pressure in a refrigeration system can be caused by（）.

5 （） is a machine by which electrical energy is transformed into mechanical energy.

6 When paralleling two AC generators, the frequency of the machine coming on-line, immediately prior to closing its breaker, should be （）

7 If the detergent type lubricating oil being used in a diesel engine is black, the oil （）

8 Heat damage to fuel injection nozzles on small high-speed diesel engines, can be prevented by（）

9 The （） compressor and its electrical motor are entirely housed in a gas-tight casing.

10 A turbocharged diesel engine will have an intake manifold pressure（）