拆装螺母时，不符合安全操作规程的是（）。

【名词&注释】

安全操作规程、不符合(inconformity)、固定物(fixture)

[单选题]拆装螺母时，不符合安全操作规程的是（）。

A. 一手抓住固定物
B. 另一手力用推
C. 少用套筒或梅花扳手
D. 根据需要增加扳手延长套管的长度

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学习资料：

[单选题]在船上测量曲轴臂距差时，以曲柄销位置为准记录臂距值时，应自（）开始测量。

A. 曲柄销位于195°处
B. 曲柄销位于165°处
C. 曲柄销位于15°处
D. 曲柄销位于345°处

[单选题]（） should not undertake any task which will interfere with the supervision duties relating to the main machinery and associated equipment.

A. The watch keeping personnel
B. The chief engineer
C. The person on a bunker barge
D. Any of the above

[单选题]The total starting air capacity required for reversible main engines is to be sufficient for at least （）.

A. six consecutive starts
B. eight consecutive starts
C. ten consecutive starts
D. twelve consecutive start

[单选题]A viscous damper, as used on a marine diesel, is a sealed precision built device which dampens the torsional vibrations in the （）.

A. camshaft
B. flywheel
C. crankshaft
D. thrust shaft

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