轮机英语单项选择题每日一练(2020.02.17)

单项选择题
Burning fuel with a high sulfur content in a diesel engine will （）
A.increase thermal efficiency
B.cause clogging of the fuel system
C.increase the ability of the engine to start in cold weather
D.produce corrosion in the cylinder and exhaust system at low loads
单项选择题
Since the engine doesn’t work well, you’d better （） as soon as possible.
A.reduce its speed
B.find out its trouble
C.eliminate its trouble
D.all the above
单项选择题
A feedback is an input（）
A.which governs the state of a variable
B.which provides a visual and audible alarm
C.which indicates values of controlled variables
D.which measures the state of the controlled variable
单项选择题
In any diesel engine closed freshwater cooling system, the lowest pressure exists at the （）.
A.jacket water outlet
B.cooling water pump outlet
C.heat exchanger outlet
D.expansion tank atmospheric vent
单项选择题
There will usually be summaries or daily account tables for heavy oil, diesel oil, lubricating oil, and fresh water, which will be compiled（）
A.at the beginning of every watch
B.at the beginning of the first watch every day
C.at the completion of every watch
D.at noon every day