单项选择题
Wires should have each feature of the following except （）
A.flame retardant
B.moisture resistant
C.oil resistant
D.low conductivity
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相关考题
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单项选择题
（）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 -
单项选择题
If you must make an electricity connection in a poorly accessible spot, solder it and seal it against （）
A.metal
B.wood
C.water
D.plastic -
单项选择题
（）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
