单选题The clutch band of a constant tensioning mooring winch must be set up tight enough to drive the winch drum and should slip only when （）.Aexcessive loads are placed on the winchBminimum pull is being exerted by the winchCautomatic operation of the winch is desiredDwire is being retrieved at the maximum rate
单选题
The clutch band of a constant tensioning mooring winch must be set up tight enough to drive the winch drum and should slip only when （）.
A
excessive loads are placed on the winch
B
minimum pull is being exerted by the winch
C
automatic operation of the winch is desired
D
wire is being retrieved at the maximum rate
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