單項(xiàng)選擇題During the watch keeping at sea, at appropriate intervals inspection should be made of （）, auxiliary machinery and steering gear spaces by the duty engineer.

A.the main propulsion plant
B.lifesaving jackets
C.lifeboat engine
D.state of emergency generator


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1.單項(xiàng)選擇題The ground terminal of a starter should be connected to （）

A.the common ground point
B.the starter’s frame
C.the commutator
D.the starter’s mounting bolts

2.單項(xiàng)選擇題Wires should have each feature of the following except （）

A.flame retardant
B.moisture resistant
C.oil resistant
D.low conductivity

3.單項(xiàng)選擇題（）connectors hold best if a wire is accidentally pulled or a connection becomes loose.

A.Ring type
B.Fork type
C.Spade type
D.Push on pull off type

5.單項(xiàng)選擇題（）is electricity that is flowing where it’s not supposed to through water, fittings on your boat, wet wood, damp surfaces, etc.

A.Stray current
B.Rated current
C.Starting current
D.Earth current