海船船员考试轮机部三管轮模拟题1(轮机英语)
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The inner part of the condenser should be cleaned with _____.
- A.gas oil
- B.diesel oil
- C.chemical compound
- D.Freon-12
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The purpose of an air compressor unloading device is to _____.
- A.drain water from the air receiver
- B.drain water from the cylinders
- C.delay the compression process until the motor is up to speed
- D.check pump alignment
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Governors are equipped with motors for synchronizing, load sharing and frequency control.
- A.speed setting
- B.load setting
- C.speed changing
- D.load setting
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Thermostatic expansion valves can be adjusted for _____.
- A.suction pressure only
- B.head pressure only
- C.superheat only
- D.suction pressure and box temperature
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Which of the listed characteristics of lube oil are the most important to the engineer from an operational standpoint?
- A.Ash content, carbon residue, and gravity
- B.Viscosity, acidity, and demulsibility
- C.Pour point, flash, point, and precipitation number
- D.Auto-ignition point, viscosity index, and film strength
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Deck machinery, which is also known as hull machinery, includes all power driven equipment located ______ the machinery spaces that is ______ with the main propulsion plant.
- A.inside / associated
- B.inside / not associated
- C.outside / associated
- D.outside / not associated
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A lube oil sample taken from the main engine lube oil system has dark yellow opaque colorThis is the result of .
- A.water contamination
- B.mixing oils of two widely different viscosities
- C.overheating
- D.aeration
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Each cylinder liner on the marine medium speed engines _____.
- A.is usually cooled by sea water
- B.can be replaced when worn out
- C.is in direct contact with the water in the bore of the cylinder
- D.can t expand when heated
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The space between cylinder liner and jacket is called _____.
- A.the circulating tank
- B.the scavenge box
- C.the cooling water space
- D.the cooler
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The crankshaft deflection is at first to be _____ before and after repair.
- A.disassembled
- B.renewed
- C.measured
- D.regulated
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