航海英語(yǔ)各種英文申請(qǐng)書單項(xiàng)選擇題每日一練(2019.01.24)

單項(xiàng)選擇題
A hand held instrument used to measure distances between objects and the ship is a（）.
A.vernier
B.psychrometer
C.hygrometer
D.stadimeter
單項(xiàng)選擇題
Permanent magnetism is found in（）.
A.hard iron
B.soft iron
C.vertical iron only
D.horizontal iron only
單項(xiàng)選擇題
Cargo transfer operations on a tank vessel need NOT be stopped when（）.
A.a tug comes alongside while the tanker is loading grade
B.and E cargoes B. a large，fresh oil spill is discovered immediately adjacent to the side of the tanker
C.there is an electrical storm in the vicinity
D.there is a fire on the dock or on a nearby vessel
單項(xiàng)選擇題
An inert gas system installed on a tanker is designed to（）.
A.aid in the stripping and cleaning of cargo tanks
B.increase the rate of discharge of cargo
C.force toxic and explosive fumes from a cargo tank to vent to the outside atmosphere
D.lower the oxygen levels inside cargo tanks，making explosion nearly impossible
單項(xiàng)選擇題
A jack-up drilling rig being towed must（）.
A.turn off all lights that interfere with the navigation lights
B.turn on all available working lights on deck
C.ring the bell rapidly for five seconds once a minute
D.display two black diamonds in a vertical line during the day