The greatest strain，when lifting a load with the jumbo purchase，is on（）.

Large quantities of uncovered pig iron or billets should not be carried in the upper-tween decks because（）.

In securing deck loads for an ocean tow，drill pipe should be（）.

An oil tanker，except as provided for otherwise，might discharge certain amount at certain rate of oil or oily mixtures into sea when（）.

A vessel has an amidships superstructure. Which location would be most suitable for on-deck stowage of automobiles?（）.

If reefer spaces are not properly cleaned prior to loading cargo，it will most likely cause（）.

According to regulations，access to a cargo pumproom in a tanker carrying grades C or D liquid cargo shall be（）.

To serve as a person in charge of transfer operations on board a self-propelled tanker，an individual must（）.

By regulation，cargo tank atmosphere must be inert before and during which operation?（）

Cargo booms must be weight tested to recertify the Safe Working Load (SWL) every（）.