The net productivity per gang-hour can be improved through a decrease of（）.

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（）.

What does “evel-luffing” accomplish during crane operations（）.

Where is the most probable location of the remote shutdown station for cargo pumps on a tank barge carrying oil（）.

The item（）is not the advantage of the hydraulic winch．

Which of the following statement（s）is/are FALSE regarding a twin pedestal crane set （）.

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

The Master or person in charge of a ship shall ensure the crane record book shows the（）.

Official draft measurements should be（）by authorized persons，agreed by both parties involved.

Which statement comparing a shipboard crane to conventional gear is TRUE（）.