轮机英语船舶电气与船舶安全单项选择题每日一练(2019.01.23)

单项选择题
Electric circuits are protected against overloads and short circuits by means of a/an （）.
A.circuit breaker
B.amplifier
C.diode
D.capacitor
单项选择题
Bunkering shall be terminated if there is a （）
A.severe electrical storm
B.fire on the pier
C.fire on the ship
D.any of the above
单项选择题
Generally, runaway means such situation when the speed main engine exceeds the rating speed by its （）
A.10%
B.15%
C.20%
D.5%
单项选择题
Safety is dependent on orderliness and cleanlinessOrder may be maintained by （）
A.storing all items in an assigned place
B.storing all items in a common storage container except those ready-for-sea
C.tagging all items according to their age and then storing them together
D.disposing of worn-out items
单项选择题
The water in an auxiliary boiler should be chemically tested daily for alkalinity and（）
A.soap hardness
B.nitrog encontent
C.chloride content
D.dissolved CO₂