我
- A.phase angle
- B.frequency
- C.wave form.
- D.half mode
- A.disengaging the clutch firstly, then stopping the main engine
- B.stopping the main engine firstly, then disengaging the clutch
- C.stopping the cooling water pump firstly, then stopping the main engine
- D.stopping the main engine and disengaging the clutch at the same time
- A.they must be located at the after end of the engine
- B.they can only be used with one engine at a time
- C.they eliminate the need for controllable pitch propellers
- D.they are connected to the engine with a flexible coupling
- A.condensate
- B.a small amount of make-up feed
- C.A and B
- D.None of the above
- A.Increased viscosity of the product needs higher loading pressure, which increases the chances of a spill
- B.Air pockets may cause the fuel to bubble out of the ullage hole
- C.The temperature rise of the fuel will cause an overflow
- D.Fueling valve may become stuck closed and cause the fuel oil to spill before the valve can be opened
- A.Degree of saturation
- B.Saturation temperature
- C.Superheated temperature
- D.Degree of superheat
- A.Oil leaking from tanks inside engine room
- B.Engine room cleaning water
- C.Water leaking from the separator sludge tank
- D.Sewage
- A.ram relief valves bypass oil to stop rudder movement
- B.six-way valve shifts to the neutral flow position
- C.steering pump electric motor is de - energized by the transfer switch
- D.follow-up gear takes the hydraulic pump off stroke
- A.periodic survey
- B.statutory survey
- C.additional survey
- D.annual survey
- A.worn gland sealing shaft
- B.worn wearing rings
- C.a bent shaft
- D.reversed pump coupling
- A.direct action of cam shaft
- B.compressed air pressure
- C.hydraulic “push rods”
- D.direct action of the main piston moving down
- A.water
- B.babbitt
- C.iron or steel
- D.acids
- A.piston crown
- B.piston ring groove
- C.piston skirt
- D.piston ring area
- A.exhaust and suction process
- B.suction and compression process
- C.combustion and exhaust process
- D.working and exhaust process
- A.intercooler
- B.open air
- C.oil fired boiler
- D.B and C
- A.lowest absolute humidity
- B.lowest relative humidity
- C.highest absolute humidity
- D.highest relative humidity
- A.to fuel oil instead of diesel oil
- B.for fuel oil instead of diesel oil
- C.to diesel oil into fuel oil
- D.for diesel oil into fuel oil
- A.connect to the busbar when the load increasing
- B.supply power specially to charging panel
- C.be put into operation during the ship arriving at or leaving port
- D.ensure the power supply to critical equipment after the main switchboard out of power
- A.speed will drop drastically with any increase in load
- B.will stop due to zero fuel supply
- C.will stall upon application of load
- D.speed will remain fairly constant despite load changes
- A.scavenging air ports; exhaust ports
- B.inlet ports; scavenging air ports
- C.scavenging air ports; inlet ports
- D.exhaust ports; inlet ports
- A.drill holes through the heavy side of the impeller until it balances
- B.weld counterweights to the light side of the impeller
- C.remove metal from the heavy side by machining in a lathe
- D.acid wash and serape the heavy side until it balances
- A.The lower / the worse
- B.The higher / the better
- C.The lower / the better
- D.The highest / the worst
- A.cooling water pump
- B.nozzle cooling passages
- C.cylinder jackets
- D.heat exchanger
- 24
-
If the capacity of the refrigeration compressor is too large, the saturation temperature will _____.
- A.rise
- B.fall
- C.be maintained constant
- D.None of the above
- 25
-
How can the chance of contaminating hydraulic fluid be decreased when working on hydraulic system?
- A.clean the fittings before they are disconnected
- B.Place drip pans under leaky fittings
- C.Seal any cracks in lines with Permatex
- D.Coat all threads with graphite oil
- A.change from diesel oil to heavy fuel oil for mail engine
- B.pump out bilge water
- C.change sea chest form. lower level one to high level one
- D.test emergency generator
- A.a differential gear
- B.return springs
- C.a hydraulic accumulator
- D.relief valves
- A.hour
- B.day
- C.week
- D.month
- A.insufficient load
- B.excessively high oil viscosity
- C.relief-valve pressure setting too high
- D.reservoir level being maintained two inches above normal
- A.top of the ring groove
- B.back of the ring groove
- C.bottom of the ring groove
- D.piston ring end clearance
- A.many thousand times
- B.between times
- C.one time
- D.at times
- A.forced circulating pump
- B.compressed air
- C.gravity tank
- D.bead tank
- A.superheated outside the system
- B.in contact with an open flame
- C.heated to the boiling point
- D.All of the above
- A.positive displacement
- B.ejector
- C.centrifugal
- D.air compressor
- A.seaworthy/ be fined in our port
- B.un-seaworthy/ be disassembled in our port
- C.seaworthy/ be assembled in our port
- D.un-seaworthy / be detained in our port
- A.fuel will not be properly atomized in the cylinder
- B.ignition will be delayed due to low ignition temperature
- C.maximum fuel expansion will occur on the compression stroke
- D.fuel will ignite before top dead center
- A.after TDC
- B.before TDC
- C.after BDC
- D.before BDC
- A.misfiring
- B.pre-ignition
- C.interrupted scavenging
- D.reduced scavenging
- A.Proportional controller
- B.Integral controller
- C.Derivative controller
- D.PID controller
- A.during low loads
- B.after proper oil viscosity is reached
- C.during starting
- D.after cleaning filters
- A.the use of a poor quality oil
- B.the deterioration of its properties
- C.the formation of deposits
- D.the reduction in heat transfer ability
- A.copper
- B.carbon
- C.hydrogen
- D.sulfur
- A.a closed loop control system
- B.an open loop control system
- C.a boiler control system
- D.a steering gear control system
- A.Cooling the air to a temperature just above dew point
- B.Heating the air to a point at which moisture will boil off ,then re-cooling it
- C.Cooling the air to a point below dew point, then reheating it
- D.Heating the air and then cooling it to a point below dew point
- A.latent heat of fusion
- B.latent heat of vaporization
- C.specific heat of vaporization
- D.latent heat of the gas
- A.make
- B.cause
- C.result
- D.produce
- A.always be wide open when the compressor restarts
- B.continue to operate as if the system were in operation
- C.remain open until evaporator pressure equalizes, then close until the compressor restarts
- D.always be completely closed until the compressor restarts
- A.Open the crankcase immediately to check for damage
- B.Apply fire fighting water through the crankcase breather
- C.Allow the engine to cool before opening the crankcase
- D.Assume that there is no damage to the crankshaft
- A.height of the metacenter
- B.fighting arm
- C.righting moment
- D.metacentric height
- A.steam stop valve
- B.dry pipe
- C.feedwater system
- D.generating tubes
- A.speed of the prime mover
- B.AC excitation to the field
- C.DC excitation to the field
- D.DC excitation of the voltage regulator
- A.Prevents lateral movement of the slow speed gear
- B.Transmits propeller thrust to the hull
- C.Keeps spring bearings in line
- D.Prevents main reduction gear axial movement
- A.reduce engine exhaust noise
- B.reduce engine back pressure
- C.increase engine cycle efficiency
- D.increase turbocharger efficiency
- 54
-
As for a hydraulic single action vane pump, the inner wall of the stator is usually of _____ shape.
- A.circular
- B.elliptical
- C.rectangular
- D.hexagon
- A.the lifting appliance can always lift the freight within its rated load
- B.attention should be paid in order not to break the wedge when lifting cargo
- C.sometimes the lifting work needs other assistance other than the lifting appliance
- D.lifting work should be done with every part fit, tightness or adhesion
- A.aeration of the oil
- B.contamination of the oil
- C.pump cavitation
- D.spongy actuator movements
- A.melts and must be replaced
- B.is enclosed in a tube of insulating material with metal ferrules at each end
- C.gives no visual indication of having opened the circuit
- D.trips to break the circuit and may be reset
- A.cargo crane
- B.jib
- C.safe working load
- D.oil pressure
- A.carbonization of oils from the combustion chambers
- B.emulsions of lube oil and water
- C.coagulation of unburned fuel below the piston rings
- D.all of the above
- A.lubrication
- B.cooling
- C.balancing purpose
- D.ventilation
- A.Diesel engine propulsion
- B.Diesel electric propulsion
- C.Steam engine propulsion
- D.Gas turbine propulsion
- A.check oil level in bearing sump
- B.check them for leakage c through end seals
- C.pump bilges in time
- D.check temperature
- A.metal particles loosened by wear
- B.air when no air cleaners are used
- C.condensation of water vapors
- D.breakdown of the lubricating oil by dilution
- A.affect the injection pressure
- B.improve combustion
- C.reduce compression pressure
- D.decrease power output
- A.the exhaust valve
- B.the starting air
- C.the inlet valve
- D.the fuel oil
- A.BRC
- B.MCC
- C.AUT-0
- D.AUT-1
- A.intake stroke
- B.compression stroke
- C.power stroke
- D.exhaust stroke
- A.increase in temperature
- B.lose its energy partly
- C.expand and do work
- D.begin to be compressed
- A.late fuel injection
- B.early fuel injection
- C.high exhaust temperature from that cylinder
- D.decreased effective stroke from that injector
- A.Reciprocating
- B.Centrifugal
- C.Rotary
- D.Gear
- 71
-
Which of the following faults would allow lube oil to enter the cooling system of a diesel engine?
- A.Excessive valve train lubrication
- B.Leaking standby oil cooler core
- C.Excessive lube oil pressure
- D.Excessive lube oil in the system
- A.cam followers
- B.push rods
- C.combustion gases
- D.valve springs
- A.throttling the pressure line
- B.changing the speed of the driving rotor
- C.either A or B
- D.None of the above is tree
- A.burn excessive amounts of lube oil
- B.overheat without smoking
- C.operate with reduce power or stop
- D.run away without load
- A.ballast tanks
- B.sludge tanks
- C.machinery space bilges
- D.cargo hold bilges
- A.excessive internal leakage in the pump
- B.low discharge pressure and fluid flow
- C.excessive fluid level in the hydraulic reservoir
- D.operation of the pump at 100% efficiency
- A.signaling that all personnel are clear before lifting or lowering material
- B.Examining material for sharp edges or protruding points before handling
- C.Closing, tagging, or securing valves that permit entrance of steam, water, or air into a fitting or other equipment
- D.Throwing materials from high places to the deck
- A.larger than
- B.smaller than
- C.equal to
- D.none of the above
- A.increase the amount of cooling water to the condenser
- B.decrease the amount of cooling water to the condenser
- C.add more refrigerant to the system
- D.remove some of the refrigerant from the system
- A.voyage repairs
- B.routine docking
- C.damage repairs
- D.conversion
- A.a crankcase explosion
- B.a scavenge fire
- C.abnormal compression ratio
- D.incorrect air / fuel ratio
- A.excessive fuel pressure
- B.high lube oil viscosity
- C.inadequate fuel injection
- D.excessive starting air pressure
- A.series circuit
- B.grounded circuit
- C.short circuit
- D.closed circuit
- A.save network cost
- B.improve the reliability of supplying power to important load
- C.prevent sequence reverse
- D.increase the power factor of important load
- A.minimum
- B.maximum
- C.leading
- D.lagging
- A.superheat of the gas leaving the compressor
- B.back pressure in the evaporator
- C.temperature of the icebox
- D.superheat of the gas leaving the evaporator
- A.Liner wear is distributed equally between the upper and lower portions of the cylinder
- B.Excessive liner wear causes wear between piston ring and groove
- C.Excessive, but uniform. liner wear will not cause wear between piston ring and groove
- D.Liner wear is normally greatest in the middle of the cylinder
- A.Impeller
- B.Compressor
- C.After-cooler
- D.Exhaust differ
- A.molecular fluid vibration
- B.energy losses
- C.wide pressure variations
- D.mechanical damage to control valves
- A.clearance
- B.crush
- C.pitch
- D.thrust
- A.pilot air; pilot air
- B.handle; solenoid
- C.handle; pilot air coming through the distributor
- D.solenoid; pilot air coming through the distributor
- A.the Prevention of Pollution by Oil
- B.the Prevention of Pollution by Noxious Liquid Substances in Bulk
- C.Prevention of Pollution by Garbage from Ships
- D.Prevention of Air Pollution from Ships
- A.To reduce the main engine speed
- B.To increase the main engine speed
- C.To govern the main engine speed
- D.To fix the propeller shaft
- A.Class A
- B.Class B
- C.Class C
- D.B+C
- A.Radiation
- B.Conduction
- C.Convection
- D.Each of the above
- A.the pressure of the starting air is high enough
- B.there is enough air in the air reservoirs
- C.the air is supplied into the cylinders in the appropriate sequence
- D.all of the above
- A.Routine supervisory labor particularly the unproductive night-service labor is reduced
- B.Engine mal-operation is automatically sensed and manned
- C.The engine room need be manned at night in bad weather or close waters
- D.Some remedial measures can be taken automatically
- A.Camshaft beatings
- B.Main bearings
- C.Piston crowns
- D.Cylinder walls
- A.reciprocating pumps
- B.positive displacement pumps
- C.centrifugal pumps
- D.centripetal pumps
- A.in series
- B.in parallel
- C.assembled
- D.together
- A.To provide accessibility to the cylinder liners
- B.To add stability to the engine block
- C.To add rigidity to the block and a surface for attaching other parts
- D.To make a surface for the base
- A.through bolts
- B.turbo-chargers
- C.bed plates
- D.columns
- A.Cooling water is alkalescence
- B.cooling water is acidity
- C.cooling water has salinity
- D.cooling water has impurity
- A.Maintains a constant head on the system
- B.Reduces the likelihood of air or steam pockets formation
- C.Provides a low pressure point for the addition of makeup cooling water
- D.All of the above
- A.Spark plug
- B.Heat of compression
- C.Carburetor
- D.Glow plug
- A.less even torque
- B.higher cylinder head temperatures
- C.fewer power strokes per revolution
- D.greater weight/size requirements
- A.laying a straight edge across the crank webs at the crankpin and measuring the distance to the crankpin in two places
- B.measuring the crank drop on either side of each crank throw while the crankshaft is slowly rotated through one revolution
- C.rotating the crankshaft through one revolution, pausing each 90oof rotation to measure bearing clearances, top and bottom
- D.taking micrometer reading between the crank cheeks opposite the crankpin every 90°of crank angle rotation
- A.proportional band
- B.the error signal
- C.the reset signal
- D.feedback
- A.the solid waste dump chute
- B.an access door
- C.the same way for waste oil burners
- D.a changing opening
- A.ISM
- B.DOC
- C.SMC
- D.PSC
- A.Maritime Safety Administration
- B.Master of the vessel
- C.Chief Engineer
- D.Chief Mate
- A.accelerates / decelerates
- B.accelerates / accelerates
- C.decelerates / decelerates
- D.decelerates / accelerates
- A.the solenoid valve to seize
- B.the compressor to hunt
- C.flash gas to form. in the liquid line
- D.the expansion valve to freeze open
- A.fresh water
- B.sea water
- C.lubrication
- D.fuel oil
- 115
-
Which of the following components provides a direct source of seawater for the fire main system?
- A.Rose box
- B.Sea chest or spool piece
- C.Sluice valve
- D.Fire pump stuffing box
- A.(1) only is correct
- B.(2) only is correct
- C.both (1) and (2) are correct
- D.Neither (1) or (2) are correct
- A.completed
- B.carried out
- C.cleaned
- D.steamed
- A.The tank is safe to enter
- B.The tank is especially dangerous to enter
- C.Carbon monoxide is present
- D.Water vapor present when the tank was sealed has oxidized
- A.manual mode
- B.automatic mode
- C.remote mode
- D.follow-up mode
- A.fuel knock
- B.increased power
- C.low compression pressure
- D.high exhaust temperature
- A.pinion arrangement
- B.push rod
- C.handle bar
- D.cam device
- A.Feed back
- B.Negative feed back
- C.Close loop
- D.Open loop
- A.need to repair
- B.need to be repaired
- C.needs to repair
- D.needs repairing
- A.erase the entry and rewrite it
- B.notify the ships officer-in-charge
- C.completely black it out and make the correct entry alongside
- D.draw a single line through the wrong entry and initial it
- A.set point
- B.control point
- C.deviation
- D.offset
- A.primary feedback
- B.deviation
- C.sensitivity
- D.dead band
- A.Internally finned liner
- B.Externally finned liner
- C.Wet liner
- D.Integral water-jacket liner
- A.a cooling system
- B.a lubricating system
- C.an electric system
- D.an injection system
- 129
-
Fuel oil is thought to be one of the main factors _____ the operation and maintenance of an engine.
- A.have nothing to do with
- B.having nothing to do with
- C.have much to do with
- D.having much to do with
- A.no oxygen is needed
- B.oxygen is necessary
- C.oxygen is given off
- D.no gas is produced
- A.the indicators
- B.the starting valves
- C.the cylinder lubricators
- D.the turning gear
- A.secure all openings to the tank
- B.discharge an initial charge of CO2 with a hand portable extinguisher
- C.direct a fire hose into the tank and energize the fire main
- D.spray the tank boundaries with a fire hose to promote cooling
- A.The amount of fuel injected will be increased
- B.The start of injection will be retarded
- C.The nozzle will permit fuel to dribble
- D.The spray pattern will be distorted
- A.preparation for stand-by should be organized by engine room
- B.engine trails should be agreed with bridge, and then do it
- C.As to engine trials of the twin diesels and two propellers, the two diesels should use “slow ahead” at the same time
- D.After engine trials, the handle of the engine telegraph should be put in the “stop” position
- A.crankshaft
- B.camshaft
- C.piston rod
- D.rack and pinion
- A.chain lifter
- B.winch barrel
- C.slewing rim
- D.warping dru
- A.At zero load the intake manifold pressure is greater than the exhaust manifold pressure
- B.At full load the intake manifold pressure and exhaust manifold pressure are equal
- C.At full load the intake manifold pressure is less than the exhaust manifold pressure
- D.At full load the intake manifold pressure is greater than the exhaust manifold pressure
- A.camshaft seizure
- B.lube oil pump failure
- C.lube oil cooler failure
- D.lube oil pump overflow
- A.incorrect replacement of barrels and plungers of jerk pumps
- B.overheating of the nozzle orifices
- C.cracked pump housings
- D.dirt in the fuel
- A.pumped speed/came out
- B.pumping rate/overflowed
- C.flowing rate/leaked out
- D.flowed speed/spilled out
- 141
-
To successfully reduce an excessively high diesel engine exhaust gas temperature, you should _____.
- A.reduce the engine driven fuel pump outlet pressure
- B.retard the fuel injector timing to reduce power
- C.increase the fuel rack setting
- D.reduce the load on the engine
- A.implement/verify
- B.maintain/improve
- C.implement/maintain
- D.review/access
- A.can be started at low temperature and are free from preheating
- B.usually are preheated by steam before being started
- C.are kept at a constant temperature and free from preheating
- D.are kept at a low temperature to save energy
- A.in order that
- B.because of
- C.in order to
- D.owing to
- A.Bypass the after-cooler to operate at speed
- B.Run at reduced speed until the cooler can be repaired or renewed
- C.Switch to diesel fuel and run at full speed
- D.Nothing need to be done due to the low heating value of heavy fuel
- A.wide compression rings are used
- B.oil rings are located above the piston
- C.chromium plating is used on all piston rings
- D.oil rings are located near the bottom of the piston skirt
- A.The high / the large
- B.The higher / the larger
- C.The lower/the larger
- D.The low / the large
- A.is coming upward, cylinder ring belt
- B.is going downward, piston ring belt
- C.is coming upward, piston ring belt
- D.is going downward, cylinder ring belt
- A.dilutes the lube oil and reduces its viscosity
- B.forms sulfuric acid in the lube oil
- C.causes pitting and failure of the bearings
- D.causes sludge deposits on valve stems
- A.compressor/condenser
- B.condenser/evaporator
- C.throttle valve/evaporator
- D.evaporator/condenser
- A.maintaining a constant rack setting
- B.storing kinetic energy
- C.maintaining equal exhaust pressure
- D.maintaining even camshaft speed
- A.restricted turbocharger air intake
- B.oil leak into the turbocharger
- C.dribbling injector
- D.low fuel viscosity
- A.scale
- B.sludge
- C.chemicals
- D.air
- A.adjusts the idle speed control
- B.drain and flushes the governor and replace the oil
- C.adjusts the compensating needle valve
- D.drain and flushes the governor and replace the oil
- A.engine room logbook
- B.voyage logbook
- C.engine room logbook or voyage logbook
- D.engine room logbook and voyage logbook
- A.hydraulic fluid contamination
- B.excessive fluid friction
- C.turbulent fluid flow
- D.fluid pressure surges
- A.higher/reduced
- B.higher/increased
- C.lower/reduced
- D.lower/increased
- A.Viscosity will increase as temperature increases
- B.Viscosity is a measure of a fluid s internal resistance to flow
- C.Viscosity will decrease as temperature decreases
- D.Viscosity is not dependent on temperature
- A.lower than / can lubricate
- B.lower than / can cool
- C.higher than / can enter
- D.higher than / cannot enter
- A.gas oil
- B.diesel oil
- C.chemical compound
- D.Freon-12
