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單項(xiàng)選擇題

Prior to any overhaul work on electric equipment, it is important to ensure the circuits are （）.

A.live
B.dead
C.excited
D.on line

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單項(xiàng)選擇題

（） control system is one in which the control action is independent of the output.

A.Feed back
B.Negative feed back
C.Close loop
D.Open loop

單項(xiàng)選擇題

（） power is the power developed within the cylinder and can be measured by an engine indicator.

A.The shaft
B.The mechanical
C.The electric
D.The indicated

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