If an attempt is made to hoist a load that exceeds the capacity of an electric winch，an overload safety device causes a circuit breaker to cut off the current to the winch motor（）.

When discharging oil from an oil tanker the instantaneous rate（）60 liters per nautical mile.

When instructing a crew member concerning the right way to lift a weight，you would instruct him to（）.

On no account（）to be exceeded.

Sudden starts or stops of the boom is likely to cause all of the following except（）.