轮机英语船舶电气与船舶安全单项选择题每日一练(2018.12.15)

单项选择题
A condenser is a vessel in which（） is deprived of its latent heat of vaporization and so changed to its liquid state.
A.sea water
B.fresh water
C.vapour
D.gas
单项选择题
Which of the conditions listed could cause the cylinder relief valves on a large, low-speed, propulsion diesel engine to lift?（）
A.Plugged injector nozzles
B.Excessive fuel injection
C.Very late injection timing
D.Incorrect crankshaft clearance
单项选择题
Prior to starting, the purpose of turning over a main propulsion diesel engine with the cylinder test cocks open, is to （）
A.test the starting system
B.remove condensation from the cylinders
C.check the compression
D.check for proper lube oil pressure
单项选择题
Clogged or partially obstructed exhaust ports on a diesel engine can cause（）
A.over-speeding of the engine
B.failure of the engine to shut down
C.no effect of engine mounting bolts
D.high exhaust temperatures
单项选择题
Overload protection on hydraulic system is provided by the use of （）.
A.stop valves
B.pressure relief valves
C.balance valves
D.regulating speed valves