
【名词&注释】
安全阀(safety valve)、中华人民共和国劳动法
[单选题]《中华人民共和国劳动法》的实施日期是_。
A. 1994.1.1
B. 1995.1.1
C. 1996.1.1
D. 1997.1.1
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举一反三:
[单选题]One of the reasons that causes oil flowed from sludge outlet of a self-cleaning purifier is
A. seal water supply be cut off
B. make-up water supply be cut off
C. oil outlet valve closed or not open sufficiently
D. the flow rate of oil is too much
[单选题]会使舵机工作油压变高的是( )。
A. 提高安全阀调定压力
B. 减用一半转舵油缸
C. 采用平衡舵
D. 降低船速
[单选题]If the suction pressure at the refrigeration compressor is below normal, the cause can be
A. refrigerant overcharge
B. overfeeding by the expansion valve
C. a restricted suction strainer
D. due to short cycling of the compress
[单选题]航行中,在使用自动操舵方式时,应每()都要进行自动舵与随动操舵的转换,以观察转换是否灵活可靠,工作是否正常。
A. 昼夜
B. 班
C. 12小时
D. 航次
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