轮机部三管轮考试题2(轮机英语)
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Texture measurement by instruments will give a value in degree CelciusThis scale of measurement is normally used for all readings and temperature values _____ dealing with theoretical calculations involving the gas laws.
- A.in addition to
- B.in addition that
- C.except that
- D.except when
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The successful operation of any engine or machine and ____ depend on effective lubrication.
- A.their no trouble period
- B.their freely trouble period
- C.its free trouble life
- D.its trouble-free life
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Each ship shall carry on board a shop security plan approved by .
- A.the chief engineer officer
- B.the master of the ship
- C.the manager of the company
- D.the Administration
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To ensure oil purifier working in normal condition, the interval between two sludge discharging should not exceed hours.
- A.2
- B.4
- C.5
- D.6
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______ means a plan developed to ensure the application of measures on board the ship designed to protect persons on board, cargo, cargo transport units, ship’s stores or the ship from the risks of a security incident.
- A.Ship security plan
- B.Company security plan
- C.Port facility security plan
- D.National security plan
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Which of the petroleum products listed has the lowest flash point?
- A.Hydraulic oil
- B.Lubricating oil
- C.Diesel oil
- D.Refrigeration oil
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Which of the following statements concerning a simple parallel resistance circuit is correct?
- A.The voltage drop across each resistor is the same
- B.The total current flow equals the reciprocal of the sum of the individual currents
- C.The total resistance equals the sum of the individual resistances
- D.The total voltage equals the sum of the individual voltages across each resistance
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The most common type of containment device for spilled oil on the water is the use of _____.
- A.straw
- B.booms
- C.skimmers
- D.chemical dispersants
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What is the term given to the process of breaking up fuel oil into very fine particles for better combustion?
- A.Settling
- B.Straining
- C.Spraying
- D.Atomizing
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The delivery rate of a variable stroke axial piston hydraulic pump is controlled by varying the position of the _____.
- A.slide block
- B.tilting box
- C.pintle
- D.reaction ring
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Crank web deflection readings will give a positive indication of _____.
- A.worn main bearing journals
- B.torsional stress deformation
- C.slack thrust bearings
- D.bearing shells shim dimensions
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The main purpose of starting the diesel engine on air briefly is .
- A.to inspect if the cylinder has the water leakage
- B.to expel out the residual water /gas /oil from the cylinder
- C.to check if fuel supply is normal
- D.A and B
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Oily water separator mis-alarms, the most possible reason is ____.
- A.separating oil too fast
- B.the sensor flushed badly
- C.the discharge solenoid value out of order
- D.too low heating temperature
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Fuel is not supplied to the corresponding cylinders due to _____.
- A.a failure of the motor
- B.a failure of lubricator
- C.a failure of cylinder
- D.a failure of fuel pump
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Which of the listed conditions will affective pressure the most in the cylinder of a diesel engine?
- A.TBN of the lubricating oil
- B.Temperature of the lube oil
- C.Completeness in the mixing of the fuel and air
- D.Temperature of the cooling (sea) water
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A centrifugal bilge pump requires priming _____.
- A.primarily to lubricate the shaft seals
- B.due to the inability of this type of pump to lift water to cover the suction (eye) of the impeller
- C.to initially unload the pump by having its head pressure equal to discharge pressure
- D.in order to overcome the potential energy of water in the discharge line
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The cylinders, with cooling jackets, are _____ to the engine frame. by eight tie rods.
- A.screwed
- B.welded
- C.fastened
- D.rotated
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Sludge may form. in the lubricating oil crankcase of a reciprocating air conditioning compressor as a result of ______.
- A.wax precipitation in the lube oil
- B.contamination by dust, scale, or moisture
- C.refrigerant bubbles in the lube oil
- D.refrigerant reducing the lube oil viscosity
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Exhaust valve grooving and corrosion is caused by certain components of residual fuel oilThese components are sodium, sulfur, and _____.
- A.vanadium
- B.carbon
- C.copper
- D.ash
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Cross scavenging requires the fitting of _____ to prevent air or exhaust gas escape when the piston is at the top of the stroke.
- A.a exhaust valve
- B.a piston skirt
- C.a piston crown
- D.an air suction valve
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A segregated ballast system is a system where _____.
- A.all ballast is processed through the oily water separator
- B.ballast is taken on and discharged through a separate main deck riser
- C.ballast and cargo tanks are separated by cofferdams
- D.all ballast lines, tanks, and pumps are independent of those used for oil
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A gudgeon pin in a trunk piston may be free to float and rotate, with _____ to limit axial movement.
- A.split pins
- B.crankpins
- C.dipsticks
- D.circlips
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Engine operating conditions may be indicated by the color of the exhaust smokeBlack smoke could indicate____.
- A.an insufficient speed droop setting
- B.an overloaded engine
- C.clogged drain holes in the oil control rings
- D.complete combustion
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The engine has one or two group of fuel pumps, depending upon _____.
- A.the number of fuel valves
- B.the number of cylinders
- C.the speed of engine
- D.the power of engine
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The objective of ISPS Code is .
- A.to protect the marine environment
- B.to provide a method to avoid an accident
- C.to protect the ship from collision
- D.to keep terrorism action away from ships
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The most common cause of scale formation in an auxiliary boiler is _____.
- A.concentrations of calcium sulfate in the boiler water
- B.fuel oil in the feed water
- C.improper treatment of the feed water with calcium sulfate
- D.excessive feed water alkalinity
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Which statement concerning the collection of fresh water is FALSE?
- A.Fresh water may be obtained from fish
- B.lifeboat covers or canopies should be washed with rain before drinking water is collected
- C.Fresh water may be collected from condensation inside the life-raft
- D.Freshwater cannot be produced from standing seawater
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The responsibilities of the engineer officer in charge of the watch do not include ________ .
- A.to ensure the main propulsion plant are kept under constant surveillance
- B.to ensure the auxiliary systems are kept under constant surveillance
- C.to inspect the steering gear spaces at suitable intervals
- D.to inspect and overhaul the equipments in his charge
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Cylinders of marine diesel engines are normally cooled by _____.
- A.sea water
- B.fine mineral oil
- C.sanitary water
- D.fresh water
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A pump is defined as device that
- A.produces pressure
- B.imparts energy to a fluid to move it from level ‘A’ to level ‘B’
- C.creates a vacuum to move a liquid in all installation
- D.is to develop a pressure differential
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After the trouble of the automatic control system has been completely eliminated, assistance is _____ required.
- A.remained
- B.still
- C.no longer
- D.much mere
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Whether a ship is sailing before the wind or sailing in the rough sea, we must reduce the fuel injection of the main engineFor the former one, it aims to prevent the main engine being , while for the later one, it aims to prevent the main engine being .
- A.overspeed / overload
- B.overload / overspeed
- C.over torque / overspeed
- D.low mechanical efficiency / overload
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Main bearings are required to support the crankshaft at each _____.
- A.end
- B.web
- C.pin
- D.journal
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When the heat load begins to increase, the needle valve of an expansion valve will______.
- A.move in an opening direction
- B.move in a closing direction
- C.either open or close
- D.not move at all
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____ into the cylinder because no fuel can burn _____ it.
- A.Air must be admitted/without
- B.Oil must be injected/without
- C.Air must be admitted/with
- D.Oil must be injected/with
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Copper is often used as an electrical conductor because it _____.
- A.has high resistance at low temperatures
- B.has a highly polished surface
- C.is able to pass current with little opposition
- D.holds insulation together well
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Differential needle valves used in fuel injectors are directly closed by .
- A.cam action
- B.spring force
- C.fuel oil pressure
- D.firing pressure
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To operate a centrifugal fire pump at reduced capacity, you should _____.
- A.readjust the relief valve
- B.throttle the suction line
- C.throttle the discharge valve
- D.open the priming line
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Which one of three elements for a fire on a tanker vessel is most difficult to eliminate (isolate)?
- A.a combustible element, fuel
- B.energy (resources for ignition) to start the combustion
- C.oxygen to support the combustion
- D.both A and C are correct
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During working, thermostatic expansion valve should be _____.
- A.either all the way open or all the way closed
- B.normally fully open
- C.throttled depending on load
- D.controlled by liquefied pressure
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Voltage generated by most AC generators is fed from the machine to the bus by means of_____.
- A.brushes on a commutator
- B.brushes on slip rings
- C.slip rings on a commutator
- D.direct connections from the stator
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The alarm signal for engine room catching fire is a blast of random bell follow by ____.
- A.two knock
- B.three knocks
- C.four knocks
- D.five knocks
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When the vessel on the full speed ahead, if full astern immediately ____ the main engine start astern and fuel injection.
- A.after the thrust power is zero
- B.after the torsion is zero
- C.surpass the critical point on the water turbo phase
- D.after the speed is zero
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Since the burning or combustion takes place within the engine itself, the engine is known as _____.
- A.a fire -tube boiler
- B.an internal combustion engine
- C.an external combustion engine
- D.an internal combustion generator
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The cooling water is in direct contact with the outer surface of the liner as a result of which it is termed a _____.
- A.water liner
- B.wet liner
- C.dry liner
- D.drown liner
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When you notice oil on the water near your vessel while taking on fuel, you should FIRST _____.
- A.stop loading
- B.notify the senior deck officer
- C.notify the terminal superintendent
- D.determine whether your vessel is the source
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Electrical supply is always needed even if only for lighting so after a ship goes into service it is extremely rare for the main bus-bars to be dead, it therefore follows that the bus-bars are continuously alive_____ the life of the ship .
- A.along
- B.will
- C.throughout
- D.for
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The minimum speed an engine must attain before ignition can occur depends upon _____.
- A.the type and size of the engine
- B.the condition of the engine
- C.ambient temperature
- D.all of the above
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The scavenge air receiver is of a simplified and modular design with integral non-return flaps, hanging cooler and two auxiliary air blowers.
- A.dozens
- B.parcels
- C.bundles
- D.gallons
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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