我
- A.open / “stop”
- B.closed / “stop”
- C.open / “start”
- D.closed / “start”
- A.3 n mile
- B.5 n mile
- C.12 n mile
- D.25 n mile
- A.flanges
- B.nuts
- C.expansion joints
- D.bolts
- A.one-half engine speed
- B.the same as engine speed
- C.twice engine speed
- D.four times engine speed
- A.the main engines
- B.the auxiliary engines
- C.the emergency generator engine
- D.the auxiliary engines and the main engine(s)
- A.the expansion ratio will decrease
- B.combustion will be slowed down
- C.thermal efficiency will decrease
- D.thermal efficiency will increase
- A.Special tools are required for lapping or grinding
- B.It is impossible to throttle flow with a butterfly valve
- C.To close the valve, it is only necessary to turn the handle a quarter of a turn
- D.The butterfly valve should never be used in a freshwater system
- A.The pressure-vacuum relief valve should be reset
- B.The tanks should be made seaworthy to prevent contamination
- C.The tanks should be sounded to make sure the levels are not rising
- D.The tanks should be marked with a bull stamp on the manifold filling valve
- A.the column
- B.the jacket
- C.cylinder cover
- D.cylinder liner
- 10
-
In a centrifugal Freon refrigeration system, the overall capacity of the system is increased by .
- A.opening more bypass lines
- B.opening additional expansion valves
- C.adding refrigerant
- D.speeding up the machine
- A.alternator
- B.glass thermometer
- C.burdon tube
- D.piezoelectric pressure transducer
- A.by opening the separator manually
- B.by separating the lower part from the upper part automatically
- C.by separating the upper part from the lower part automatically
- D.continuously
- A.compression ratio
- B.valve size
- C.fuel pressure
- D.cylinder clearance volume
- A.too little seal water
- B.improper gravity disc
- C.oil discharging pump not working very well
- D.low water level of the working water
- A.(1) and (2)
- B.(1), (2) and (3)
- C.(1) and (3)
- D.(2) and (3)
- A.seating
- B.bedplate
- C.entablature
- D.cylinder block
- A.in the middle of evaporator coils
- B.near the evaporator coil outlet
- C.near the evaporator coil inlet
- D.on the bottom row of evaporator coils
- A.feed pump suction line
- B.hot well
- C.shell of the feed heater
- D.feed lines to the boiler
- A.undercutting
- B.sanding
- C.burnishing
- D.filing
- A.stop the L.O pump, S.W pump, F.W pump
- B.stop the priming F.O transfer pump
- C.engage the turning gear
- D.open the scavenge air belts drain valve and cover the turbocharger silencer with the dustproof cover
- A.excessive heat
- B.insufficient heat
- C.effective cooling
- D.high output
- A.bimetallic type
- B.diaphragm type
- C.bourdon tube type
- D.resistance-temperature type
- A.the chief engineer must be informed at first
- B.the captain must be informed at first
- C.it must be taken by the duty engineer
- D.the generator engine must be stopped
- A.Both are higher than normal burning temperatures
- B.The flash point is always higher
- C.The ignition temperature is always higher
- D.They are not necessarily related
- A.decreased clearances between rotating parts
- B.decreased slippage to the suction side of the pump
- C.air binding in the discharge ports
- D.erosion and excessive wear
- A.the power of main engine will be reduced
- B.exhaust temperature will be increased
- C.the speed of the ship will be reduced
- D.the propulsion characteristic of propeller will keep unchanged
- A.saturated
- B.super-cooled
- C.wet
- D.superheated
- A.sluggish response
- B.speed droop variations
- C.isochronous governing
- D.sensitivity increase
- A.III .II .I
- B.III .I .II
- C.I.III .II
- D.II .III .I
- A.deprival of oxygen
- B.removal of heat
- C.spraying of water
- D.injecting of soda-acid
- A.Water energy
- B.Electrical energy
- C.Chemical energy
- D.Heat energy
- A.mixed-flow
- B.axial-flow
- C.centrifugal
- D.displacement
- A.repeatedly
- B.quickly
- C.gradually
- D.immediately
- A.Gas exchange
- B.Charging
- C.Scavenging
- D.Supercharging
- A.metal particles loosened by wear
- B.air when air cleaners are not used
- C.condensation of water vapors
- D.breakdown of the lubricating oil by dilution
- 36
-
Clean oil is achieved in a clarifier bowl where the impurities and water collect at the bowl _____.
- A.bottom
- B.top
- C.center
- D.periphery
- A.higher efficiency of the gear train while reversing
- B.the higher gear ratio
- C.the multi-start feature
- D.higher recovering speed
- A.low compression
- B.air-bound fuel system
- C.improper spark
- D.change in viscosity
- A.To work
- B.Working
- C.Having worked
- D.worked
- A.less than
- B.lighter than
- C.larger than
- D.smaller than
- A.reduce radial thrust to the impeller
- B.double the liquid velocity through the pump when compared to a single volute
- C.reduce hydraulic end thrust
- D.provide the effect of multi-staging
- A.to starboard
- B.to port
- C.forward
- D.aft
- A.not be changed
- B.be changed
- C.should not be changed
- D.should be changed
- A.Each has three separate but identical armature windings acted on by one system of rotating magnets
- B.Each has one armature winding acted on by three identical but separate systems of rotating magnets
- C.All three-phase alternators are designed to operate with a O8 leading power factor
- D.The three phases always provide power to the load through three sets of slip rings and brushes
- A.engine operating speed
- B.an air manifold
- C.a hydraulic distributor
- D.individual cams and valve gear
- A.lantern rings
- B.bearings
- C.easing volutes
- D.wearing rings
- A.heavy carbon deposits will buildup on the valves and in the exhaust
- B.fuel dilution is increased at low load
- C.exhaust valves may be damaged
- D.all of the above
- A.worn bearings and piston pins
- B.slugging due to flooding back
- C.too much oil in circulation
- D.All of the above
- A.if
- B.as
- C.unless
- D.when
- A.control equipment
- B.power unit
- C.transmission mechanisms
- D.fittings and pipeline
- A.the indicators
- B.the starting valves
- C.the cylinder lubricators
- D.the turning gear
- A.change from heavy fuel oil to diesel oil for mail engine
- B.pumping oil bilge water
- C.change sea chest form. high level one to lower one
- D.test emergency generator
- A.satisfied engineers
- B.qualified ratings
- C.satisfied chief engineer
- D.qualified chief engineer
- 54
-
Excessive oil foaming in the crankcase of a refrigeration compressor at start up can cause _____.
- A.compressor damage from improper lubrication
- B.refrigerant absorption by the lubricant
- C.increased viscosity in the lubricant
- D.carbon deposit on the compressor suction valves
- A.stop the engine by cutting off the cooling water supply
- B.stop the engine by closing the air intake
- C.slow the engine but not stop it
- D.slow the engine to half of normal load
- A.high lube oil viscosity
- B.increased lube oil consumption
- C.low lube oil temperatures
- D.high firing pressures
- A.update
- B.finish
- C.outdated
- D.expire
- A.reduce gas flow turbulence
- B.prevent exhaust gas corrosion
- C.increase the rate of combustion
- D.increase the rate of heat transfer
- A.Flash point improvers
- B.Pour point improvers
- C.Inhibitors
- D.Foam suppressors
- A.(1) only
- B.(1) and (2)
- C.(2) and (3)
- D.(1), (2) and (3)
- A.(1), (2) and (3)
- B.(1) and (2)
- C.(1) and (3)
- D.(2) and (3)
- A.increased horsepower
- B.reduced efficiency
- C.increased heat loss
- D.lower cylinder pressures
- A.a burned out solenoid in the oil supply valve
- B.high temperature excess air
- C.incorrectly setting the hot-well dump valve
- D.an incorrectly positioned burner snubber realy
- A.the period of time during which no trouble occurs to the engine
- B.no trouble will occur to the engine all its life
- C.trouble may occur freely to the engine
- D.no matter what you do to the engine, no trouble will occur during this period
- A.six months
- B.one year
- C.three year
- D.five years
- A.increased heat transfer
- B.fireside erosion
- C.high steam demand
- D.overheated tubes
- A.about marine pollution prevention
- B.covering safety of life
- C.about marine
- D.about ship and port security
- A.the crosshead
- B.the crankshaft
- C.large end
- D.the piston bosses
- A.class A
- B.class B
- C.class C
- D.class D
- A.viscosity
- B.density
- C.velocity
- D.electricity
- A.space
- B.distance
- C.visibility
- D.access
- A.turn engine with jacking gear
- B.drain filters and strainers and bleed off water at each injection pump
- C.use ether to start the engine with blow-down valves open
- D.blow through the cylinders and fuel lines with a drying agent
- A.relieve excess fuel oil pressure during the “off” fire cycle
- B.admit water to the dry pipe
- C.throttle the forced draft fan output for proper combustion
- D.reduce excess steam pressure in the boiler
- A.the relief valve should open before the high-pressure cutout
- B.the relief valve should open and let excess refrigerant go to receiver
- C.the high-pressure cutout switch should operate before the relief valve opens
- D.close in on the suction valve
- A.lubricating
- B.cooling
- C.sealing
- D.cleaning
- A.I only is correct
- B.Ⅱ only is correct
- C.both I and Ⅱ are correct
- D.neither I or Ⅱ are correct
- A.thousandth ( 10 to the - 3rd power)
- B.millionth (10 to the -6th power)
- C.billionth ( 10 to the - 9th power)
- D.trillionth (10 to the - 12th power)
- A.metal
- B.wood
- C.water
- D.plastic
- A.draw a one line diagram of the circuitry
- B.test all fuses and measure the line voltage
- C.take megger readings
- D.insulate the apparatus from ground
- A.series of baffles
- B.crossover pipe
- C.condensate separator
- D.drain pump
- A.posting a fire watch in the immediate area
- B.providing an extinguisher which is ready for immediate use
- C.requiring the fire watch to remain on post for 30 minutes after the completion of welding or burning
- D.All of the above
- A.Dry chemical
- B.Foam
- C.Water
- D.Carbon dioxide
- A.descriptions
- B.discrepancies
- C.different
- D.deflections
- A.produce the heat for ignition
- B.decrease injection lag
- C.increase ignition delay
- D.aid in exhausting burnt gases
- A.after TDC
- B.before TDC
- C.after BDC
- D.before BDC
- A.reciprocating motion of exhaust valves
- B.rotary motion of the camshaft
- C.reciprocating motion of the piston
- D.developed differential
- A.make-up
- B.desired value
- C.deviation
- D.set value
- A.at once
- B.as soon as
- C.quickly
- D.straight
- A.Pre-lube cylinders with hand cranks
- B.Open all air space drain cocks
- C.Open all indicator valves
- D.All of the above
- A.reduce the ring groove wear rate
- B.seal against crankcase vapors
- C.lessen the wear on aluminum part of the cylinder
- D.allow for the greater expansion rate of aluminum
- A.increasing the quantity of starting air
- B.increasing the lube oil pressure
- C.heating the engine fuel supply
- D.heating the engine coolant
- A.solenoid valve
- B.low pressure cutout switch
- C.king valve
- D.thermal expansion valve
- A.to revolve
- B.revolved
- C.revolving
- D.to be revolved
- A.air compressor
- B.refrigeration compressor
- C.vacuum pump
- D.purifier
- A.the motor
- B.the fresh water generator
- C.the governor
- D.the fuel pump
- A.fusion
- B.vaporization
- C.condensation
- D.sublimation
- A.lowest absolute humidity
- B.lowest relative humidity
- C.highest absolute humidity
- D.highest relative humidity
- A.Inefficient scavenging; twice
- B.Inefficient scavenging; 1.8 times
- C.Fewer strokes in a circle; twice
- D.Fewer strokes in a circle; 1.8 times
- A.Class "A"
- B.Class "B"
- C.Class "C"
- D.Class "D"
- A.be less than
- B.be larger than
- C.be as large as
- D.not be so large as
- A.pumping action of the piston
- B.pressure of the fuel charge
- C.vacuum developed in the manifold
- D.pressure of the fresh air charge
- A.brake capabilities
- B.reversing capabilities
- C.maneuvering capabilities
- D.acceleration capabilities
- A.increased / decreased
- B.decreased/increased
- C.decreased/decreased
- D.increased/increased
- A.sensitivity
- B.stability
- C.promptness
- D.speed droop
- A.failure of proper operation of propulsion
- B.paint peeling off the uptake
- C.no operation procedures for the oil separators
- D.damaged sanitary pump
- A.renewed
- B.welded
- C.machined
- D.chromium-plated
- A.the supply of normal air and removal of compressed air
- B.the supply of fuel oil and combustion of the atomized oil
- C.the supply of fresh air and removal of exhaust gases
- D.the supply of fresh air and removal of the extra heat
- A.total heat
- B.residual heat
- C.specific heat
- D.superheat
- A.mechanical foam
- B.chemical foam
- C.carbon dioxide
- D.soda acid
- A.BDC
- B.TDC
- C.BBDC
- D.ATDC
- 111
-
To check the setting of the overspeed trip on a diesel powered generator, you would use a _____.
- A.tachometer
- B.torsion meter
- C.dynamometer
- D.pony brake
- A.cold fuel oil
- B.low fuel oil pressure
- C.low atomizing steam pressure
- D.water in the fuel oil
- A.brake horsepower
- B.displacement
- C.cylinder volume
- D.cylinder clearance
- A.hydraulic
- B.electric
- C.steam
- D.diesel
- A.Keep the plant running all time
- B.Start another blower
- C.Increase the ratio of circulated to fresh air
- D.Reduce the seawater flow to the condenser
- A.used to do mechanical work
- B.used to establish the magnetic field of the motor
- C.lost as heat generated by the windings
- D.lost in doing work to turn the motor itself
- A.Full Ahead
- B.Half Ahead
- C.Full Astern
- D.Half Astern
- A.reciprocating pump
- B.gear pump
- C.centrifugal pump
- D.vane pump
- A.the after one is more than forward one
- B.the forward one is more than after one
- C.the forward one is the same with after one
- D.it depends on the type of engine
- A.make
- B.put
- C.keep
- D.get
- A.look for
- B.find out
- C.consult
- D.read
- A.Faulty thermostatic bypass valve
- B.Eroded zinc pencils in the heat exchanger
- C.Steam formation in the expansion tank
- D.Excessive leakage from jacket water pump seal
- A.low wax content
- B.high pour point
- C.high viscosity
- D.all of the above
- A.acid
- B.alkali
- C.salt
- D.None of the above
- A.the guideway
- B.the piston rod
- C.the crosshead shoes
- D.the interlocked circlip
- A.control the fluid flow through it
- B.prevent the pressure before it over the specified valve
- C.make the pressure after it steady
- D.control the direction of oil flow
- A.rapid reduction of ship’s friction force
- B.shaft system over mechanical load
- C.sharp growth of the torque of diesel engine
- D.propeller torque change along J= 0 curve
- A.REEFER
- B.RO/RO SHIP
- C.CONTAINER
- D.TANKER
- A.A filter
- B.A centrifuge
- C.A distiller
- D.A generator
- A.Stand-by Engine
- B.Stop Engine
- C.Finished With Engine
- D.Dead Slow Ahead
- A.cause an alarm condition
- B.secure power to the indicator
- C.secure power to the monitored device
- D.automatically recluse within 10 seconds
- 132
-
Which of the following should be the FIRST step in removing a generator from parallel operation?
- A.Trip the generator off the switchboard
- B.Turn off all electrical equipment
- C.Remove the load from the "off going" generator
- D.Increase the cycles of the generator staying on the line
- A.(1) only
- B.(2) only
- C.either (1) or (2)
- D.neither (1) or (2)
- A.low speed
- B.unequal heating
- C.less lubricating
- D.low charge air pressure
- A.point of opening
- B.speed of opening
- C.lift from its seat
- D.all of the above
- A.caustic embrittlement of the boiler metal
- B.acidic corrosion of the boiler metal
- C.hard scale deposits on the boiler tubes
- D.etching of the heat exchange surfaces
- A.Hydraulic
- B.Mechanical
- C.Pneumatic
- D.Electrical
- A.provide a means of draining the boiler
- B.warn the engineer of low water level
- C.cool the crown sheet at high firing rates
- D.open the burners electrical firing circuits
- A.acid formation
- B.sludge formation
- C.ice in the expansion valve
- D.All of the above
- A.cast iron has weakness
- B.cast iron can stand up shock loading
- C.cast iron fittings are only suitable in low pressure situation
- D.east iron fittings are not suitable in low pressure situation
- A.as much fuel as
- B.less fuel than
- C.less fuel as
- D.more fuel than
- A.Sensitivity
- B.Power
- C.Speed droop
- D.Compensation
- A.no equipment in contact with sea water
- B.less equipment in contact with fresh water
- C.more equipment in contact with sea water
- D.less equipment in contact with sea water
- A.is running
- B.stops
- C.is repaired
- D.lacks of oil
- A.precaution measures
- B.safety measures
- C.security measures
- D.emergency response measures
- A.prevent engine back pressure at heavy loads
- B.increase total engine efficiency at low loads
- C.prevent boiler corrosion at low engine loads
- D.improve engine fuel consumption at any load
- 147
-
Which of the following problems is the main source of fuel pump and injection system malfunctions?
- A.Improper lubrication
- B.Air in the fuel system
- C.Coated fuel lines
- D.Excessive vibration
- A.well ventilated
- B.well clean
- C.in good order
- D.more room
- A.Large passenger vessels
- B.General cargo ships
- C.Container ships
- D.Oil tankers
- A.atmosphere
- B.the fresh water
- C.compressed air
- D.chemical compounds
- A.should not be carried out during the watches
- B.can only be carried out in port
- C.is a kind of maintenances carried out prior to the occurrence
- D.is a kind of maintenances carried out after the occurrence
- A.clockwise
- B.anticlockwise
- C.crosswise
- D.vertically
- A.at each control station
- B.in the chief engineer’s quarters
- C.in the captains quarters
- D.All of the above are correct
- A.petroleum crystals
- B.phosgene gas
- C.water vapor
- D.carbon monoxide
- A.of the thin wall thickness
- B.honing makes it easier to maintain the desired oil ilm
- C.water seals are not required
- D.it fits more loosely due to a decrease in heat transfer through the composite wall
- A.vapor feed heater
- B.air ejector condenser
- C.saltwater heater
- D.distillate cooler
- A.pump would be very noisy
- B.pump would vibrate excessively
- C.pump would develop insufficient flow
- D.stuffing box would leak excessively
- A.The blow down valve
- B.The scum valve
- C.The air release cock
- D.Scot-blower
- A.engineer on watch
- B.Chief Engineer
- C.Chief Mate
- D.Master
- A.cam rollers on the camshaft
- B.spring force
- C.air pressure on top of the valve differential piston
- D.air pressure on the bottom of the valve differential piston
