- A.decreased compression pressure
- B.increased lube oil pressure
- C.lower lube oil temperature
- D.excessive leakage past the piston rings
- A.an diesel oil heater
- B.a waste heat boiler
- C.a fresh water generator
- D.all the above
- A.low firing pressure and low exhaust temperatures
- B.low firing pressure and normal exhaust temperatures
- C.high firing pressure and low exhaust temperatures
- D.high firing pressure and high exhaust temperatures
- A.Accommodation heating system
- B.Steering gear
- C.Boiler control
- D.Cargo control
- A.lubricating
- B.cooling
- C.cleaning
- D.neutralizing
- A.more sealing water is needed
- B.the cover clamp needs tightening
- C.the purifier has a bad vibration when started
- D.water is discharged from the overflow line
- A.doing
- B.make
- C.turn
- D.operating
- A.king valve and the expansion valve
- B.solenoid valve and expansion valve
- C.evaporator and receiver
- D.compressor and evaporator
- A.effectiveness of water-cooled exhaust elbows
- B.distribution of the load between engine cylinders
- C.amount of fuel penetration into the engine cylinders
- D.indicated horsepower of the engine cylinders
- A.I only
- B.II only
- C.either I or II
- D.neither I or II
- A.check the pyrometer readings
- B.check the crankcase oil level
- C.check the fuel oil strainers
- D.clean the fuel system
- A.“prepare to stop the engine”
- B.“assemble an engine on its bedplate”
- C.“make an engine ready for starting”
- D.“dismantle an engine”
- A.visibility
- B.ability
- C.reliability
- D.capability
- A.At the beginning of the compression stroke
- B.At the beginning of the suction stroke
- C.At the end of the working stroke
- D.At the end of the exhaust stroke
- 15
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Ammonia when used as a refrigerant is valuable because of its high efficiency, it is however _____.
- A.toxic
- B.flammable
- C.explosive
- D.all of the above
- A.higher than the bus frequency
- B.lower than the bus frequency
- C.the same as the bus frequency but out of phase with it
- D.the same as the bus frequency and the circuit breaker may be closed at any pointer position
- A.pitting
- B.sludge
- C.hard varnish
- D.all of the above
- A.cut off the power
- B.cut off the oil inlet
- C.open guide water valve
- D.close oil outlet value
- A.Viscosity
- B.acid content
- C.heating value
- D.ignition quality
- A.sea water
- B.fresh water
- C.vapour
- D.gas
- A.discharge service valve as a vapor
- B.suction service valve as a liquid
- C.charging valve as a liquid
- D.condenser purge valve as a vapor
- A.help preheat the air for the furnaces
- B.help preheat the feedwater
- C.protect economizer from excessive heat
- D.prevent excessive furnace heat losses
- A.instantaneous voltage
- B.average voltage
- C.RMS voltage
- D.peak voltage
- A.Remain
- B.to remain
- C.retain
- D.to retain
- A.The alternators are not generating the same voltages and should be adjusted on automatic voltage regulator rheostats
- B.Alternator frequencies are different and should be adjusted on the governor speed controllers
- C.Alternators are out of phase and should be tripped and paralleled again
- D.One alternator has lost one of its phases
- A.In order for a fluid to be pumped, a fluid must be made to flow
- B.A substance must be cold in order for it to be pumped
- C.The kinetic energy imparted by the pump can be used to force a liquid through a hydraulic system
- D.A pump must receive its energy from an external source
- A.bridge control panel
- B.disconnect links
- C.governor relay box
- D.main switchboard
- 28
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Heavy wear in a particular area of the inner circumference of a packing ring may be caused by _____.
- A.a high suction head
- B.rotating rings
- C.badly worn bearings
- D.a loose stuffing box gland
- A.two to four months
- B.four to six months
- C.six to eight months
- D.year
- 30
-
The air supplied to the cylinders by a turbocharger is often reduced in volume by a/an _________.
- A.air compressor
- B.diffuser
- C.after-cooler
- D.ventilator
- A.check and regulate the water level
- B.close the air cock once fires are lit
- C.blowdown the gage glass
- D.crack the steam stop to assure protective steam flow
- A.regulate the fuel supply
- B.maintain a constant fuel viscosity at the fuel valves
- C.maintain efficient cooling
- D.alter the fuel density
- A.cetane number
- B.flash point
- C.viscosity
- D.setting point
- A.vacuum drag from the auxiliary condensate system
- B.individual vacuum pumps
- C.a single non-condensing air ejector
- D.a two stage air ejector
- A.Classification Society Rules
- B.National requirements
- C.The IMO International Convention for the Safety of Life at Sea
- D.All of the above
- A.the cylinder liner
- B.the cylinder cover
- C.the cylinder jacket
- D.the piston
- A.is purified
- B.in timed
- C.is compressed
- D.atomizes
- A.has finished
- B.finishes
- C.had finished
- D.would finish
- A.Desired value
- B.Set value
- C.Measured value
- D.Deviation
- A.Between/more commonly
- B.Among/the most commonly
- C.Between/not more commonly
- D.Among/not the most commonly
- A.working at intervals and properly heating
- B.warming up to 70℃, increase water supply flow
- C.improving impulse of water supply
- D.reducing water supply flow
- A.draped over the fantail to dry out
- B.drained over the side and washed out
- C.drained into the bilges and washed out
- D.drained into buckets or fuel tanks
- A.eliminate hot air from the condenser
- B.maintain steady pressure in a system
- C.heat, or cool one fluid by means of another fluid
- D.reduce the engine room temperature in tropical climates
- A.poor distillate quality
- B.reduced evaporator capacity
- C.low brine concentration
- D.improper vacuum regulation
- A.Oil is discharged from the impeller through the outlet
- B.Gravity causes the oil to flow toward the discharge
- C.The self-priming feature of the centrifugal pump enables it to draw its own suction as it starts
- D.The discharge capacity varies directly with the speed of the impeller
- A.it included the amendments agreed up until that date
- B.it included none of the amendment agreed up until that date
- C.it required two thirds of the Parties’ acceptance for a amendment to enter into force
- D.it included a tacit acceptance procedure
- A.increase its quality
- B.obtain complete burning
- C.reduce its weight
- D.all of the above
- A.50 nautical miles
- B.30 nautical miles
- C.15 nautical miles
- D.12 nautical miles
- A.high temperature distillate can be re- circulated to induce additional flashing
- B.scale formation is not a severe problem
- C.cold shocking is more effective in removing scale
- D.water purity is greatly increased at high capacity
- A.Unsafe actions
- B.Orderliness
- C.Frequent inspections
- D.Good work habit
- A.method of supplying air
- B.cooling system
- C.method of igniting fuel
- D.valve operating mechanism
- A.low water in the expansion tank
- B.improperly seated valves
- C.low fuel oil pressure
- D.worn or broken cylinder liner sealing rings
- A.a gear
- B.a cam
- C.a rod
- D.a miler
- 54
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When occurring a fire in the scavenge air box, the following measures should be taken except for .
- A.reducing speed to SLOW and asking bridge for permission to stop
- B.stopping the fuel oil supply
- C.switching-on the auxiliary blowers
- D.putting the scavenge air box fire extinguishing equipment into function
- A.the water produced during combustion
- B.the sulfur in the fuel
- C.unburned fuel oil
- D.all of the above
- A.Chief engineer
- B.Second engineer
- C.Master
- D.Chief engineer
- A.100%
- B.110%
- C.85%
- D.different
- A.improving cylinder scavenging
- B.preheating the combustion chamber
- C.reducing air charge density
- D.preventing valve wear
- A.only if fixed containment is not used
- B.only if portable containment is not used
- C.only if fixed containment drains are open
- D.whenever the vessel is being bunkered
- A.defrosting
- B.de-oiling
- C.demulsifying
- D.dehumidifying
- A.it is dirty
- B.it is leaky
- C.it has been renewed
- D.all the above
- A.penetration of moisture
- B.accumulation of dirt
- C.overheating
- D.All of the above
- A.transmitter
- B.receiver
- C.pipes
- D.charging unit
- A.reciprocating
- B.rotating
- C.running
- D.removing
- A.quality of air filtration
- B.effectiveness of lubrication
- C.type of fuel used
- D.all of the above
- A.Secure all lighting to the main deck
- B.Provide a portable fan to blow away fumes
- C.Prohibit smoking in the area
- D.Display a black triangle during daylight hours
- A.A shortage of liquid refrigerant
- B.Excessive frost on the evaporator
- C.Excessive condenser cooling water
- D.Insufficient condenser cooling water flow
- A.an overfilled expansion tank
- B.excess chromate treatment of the jacket water
- C.a clogged raw water sea suction
- D.cavitation erosion of the heat exchanger tubes
- A.a sewage treatment plant
- B.the extended aeration process
- C.the liquor
- D.the bubbling air
- A.engine trails should be done after finishing the operation of turning the engine with the turning gear and starting the engine on air briefly
- B.in the operation of engine trails, the main engine should be running in low-speed
- C.As to the ship equipment with twin main engine, engine trials should be done with one engine ahead and another engine astern at the same time
- D.the order “engine trials” should be given by the bridge
- A.fuel oil
- B.diesel oil
- C.compressed air
- D.jacket water
- A.crane
- B.hatch cover
- C.windlass
- D.steering gear
- A.temperature
- B.viscosity
- C.density
- D.velocity
- A.The period of time in which the set point and the control point coincide
- B.The periodic change between the set point and the control point
- C.The variable difference between the set point and the control point
- D.The constant difference between the set point and the control point
- A.Carry out soot blowing if permissible
- B.Change fuel supply to diesel oil
- C.Close steam stop valves on boiler when pressure is reduced
- D.Drain boiler empty when it has cooled down
- A.when the boiler has been secured long enough for most solids to settle
- B.when the boiler has been cooled to ambient temperature
- C.only after raising the water level to within 0.5 inch of the high water cutout only
- D.after bypassing the low pressure
- A.ISM Code
- B.PSC
- C.STCW 78/95
- D.IMO
- A.a gravity tank
- B.a sump
- C.a vessel
- D.a bottle
- A.competent authority
- B.CSO
- C.PSCO
- D.Master
- A.centrifuging
- B.pressurizing
- C.atomization
- D.igniting
- A.micro-seizure
- B.sticking
- C.scratched
- D.breakage/collapse
- A.A top tank
- B.A head tank
- C.A head valve
- D.A drain tank
- A.the exhaust valves
- B.the fuel valves
- C.indicator cocks
- D.the fuel pumps
- A.increased capacity of the compressor
- B.more efficient operation of the thermal expansion valve
- C.decreased capacity of the compressor
- D.loss of receiver capacity
- A.remove any air that may accumulate in the system
- B.take out unpleasant fumes from the refrigerant
- C.vent off excess refrigerant in an emergency
- D.permit opening the refrigerating system for cleaning and inspecting
- A.close the tank filling valves quickly
- B.top off all tanks at the same time
- C.rill completely all tanks to less than 95 % full
- D.reduce the loading rate when topping off
- A.bedplates
- B.columns
- C.cylinder blocks
- D.safety caps
- A.deprival of oxygen
- B.a water spray
- C.soda-acid
- D.foam
- A.dangerous
- B.best
- C.bad
- D.important
- A.the connecting rod
- B.the cross-head
- C.the piston rod
- D.the air 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.moisture emulsification of the bearing grease
- B.insufficient circulation and overheating of the bearing
- C.proper grease circulation to cool the bearing
- D.sliding friction between balls and races
- A.fouled tubes in shell and tube condenser
- B.too little or too warm condenser water
- C.air or non-condensable gas in system
- D.overcharge of refrigerant
- A.higher than the first stage feed-water temperature and absolute shell pressure
- B.lower than the first stage feed-water temperature and absolute shell pressure
- C.the same as the first stage feed-water temperature and absolute shell pressure
- D.not related to the feed-water temperature and absolute shell pressure
- A.In crews accommodation spaces
- B.On the navigating bridge
- C.In the engine room
- D.All of the above
- A.field excitation of both units is adjusted
- B.governors of both units are adjusted
- C.phase sequence is altered
- D.kilowatt load is evenly divided
- A.Dehydrators must be used continuously in a refrigeration system
- B.A 25 ton refrigeration system has the same cooling effect as melting 25 tons of ice in 24 hours
- C.A thermostatic expansion valve is used to control refrigerated space temperature
- D.The liquid receiver functions to collect and remove non- condensable gases
- A.excessive ring action
- B.excessive ring temperature
- C.improper ring rotation
- D.excessive ring face wear
- A.I only
- B.II only
- C.both I and II
- D.neither I nor II
- A.larger than the greatest branch resistance
- B.smaller than the lowest branch resistance
- C.equal to the sum of the individual branch resistances
- D.one-half the sum of the individual branch resistances
- A.the air receivers
- B.the starting valves
- C.the cylinder covers
- D.the distributors
- A.viscosity
- B.pour point
- C.volatility
- D.lower explosive limit
- A.high lube oil temperature
- B.low lube oil temperature
- C.excessive cylinder cooling
- D.high air injection pressure
- A.methyl chloride
- B.ammonia
- C.hydrofluoric acid
- D.ozone
- A.pilot valve oil pressure
- B.speeder spring force
- C.compensation needle valve clearance
- D.centrifugal force on the flyweights
- A.insulate your shoes
- B.ground the fire hose
- C.secure its power supply
- D.start the fire pump
- A.Flows of fluids can be restricted by both cocks and valves
- B.There are seats in the internal passages of valves
- C.A disc of valve only moves up and down
- D.We can infer that there is a bore in cock ping
- A.engine displacement
- B.super-aspirating
- C.air injection
- D.supercharging
- A.cylinder liners and piston rings
- B.main bearings
- C.crankpin bearings
- D.turboblower
- A.in which
- B.by which
- C.through which
- D.from which
- A.one thousandth (10 to the -3rd power)
- B.one millionth ( 10 to the -6th power)
- C.one billionth ( 10 to the -9th power)
- D.one trillionth (10 to the -12th power)
- 112
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The selection of a lubricating oil depends to a great extent on the operating conditions, _____.
- A.the type of coolant
- B.the design of the engine
- C.the type of fuel to be burned
- D.B and C
- A.475 RPM
- B.950 RPM
- C.1900 RPM
- D.2400 RPM
- A.speed limiting governor
- B.variable speed governor
- C.constant speed governor
- D.load limiting governor
- A.10
- B.7
- C.4
- D.1
- A.engine logbook
- B.delivery docket
- C.store list
- D.maintenance book
- A.avoid unnecessary pints inventory
- B.keep torsional vibration constant
- C.use existing supports and braces
- D.maintain specified injection characteristics
- A.stop valves
- B.non-return valves
- C.quick closing valves
- D.relief valves
- A.connecting rods
- B.crankshaft
- C.crankcase
- D.through bolts
- A.high-pressure cutout switch is jammed open
- B.low-pressure switch is jammed shut
- C.thermal bulb is not operating properly
- D.scale trap is clogged
- A.starting the engine while hot
- B.knurling the piston skirt
- C.operating the engine overheated
- D.scuff resistant piston rings
- A.a regional
- B.the best
- C.an international
- D.an ideal
- A.increase the governor oil pressure
- B.adjust the speed droop setting
- C.adjust the speeder spring travel
- D.adjust the compensating needle valve
- A.Electrical energy
- B.Thermal energy
- C.Potential energy
- D.Kinetic energy
- 125
-
The term _____ refers to one complete sequence of operations required to produce power in an engine.
- A.diesel engine
- B.stroke
- C.cycle
- D.compression ratio
- A.four-stroke
- B.two-stroke
- C.slow speed
- D.reversible
- A.positive displacement
- B.non-positive displacement
- C.mixed-flow
- D.axial-flow
- A.open air-box drains
- B.loss of cooling water to the diffuser
- C.gradual fouling of the air filters
- D.improperly timed exhaust valves
- A.low oil pressure
- B.high coolant pressure
- C.leaking fuel injector
- D.cracked cylinder head or liner
- A.dry bulb temperature
- B.wet bulb temperature
- C.dew point
- D.dry point
- A.100 kW
- B.400 kW
- C.500 kW
- D.600 kW
- A.Power factor
- B.Power ratio
- C.compression ratio
- D.Compression factor
- A.noting the condition of the fairwater
- B.inspection of the keyway
- C.logging inspection results in the official deck log
- D.all of above
- A.is an indication of the amount of noncombustible material present in the oil
- B.indicates the quantity of energy released by burning a unit amount of the fuel
- C.is useful for determining proper atomization temperatures
- D.reflects the overall thermal efficiency of the fuel oil service system
- A.engine room bilges
- B.main switchboard
- C.paint locker
- D.rag bin
- A.to reduce heat stress
- B.to reduce low temperature corrosion
- C.to improve firing and starting performance
- D.fuel saving
- A.a brief trial with turning gear
- B.a brief trial on power
- C.a long trial by steering gear
- D.one minutes trial with windlass
- A.why
- B.which
- C.in which
- D.on which
- A.Ⅰonly
- B.Ⅱonly
- C.bothⅠandⅡ
- D.neitherⅠnorⅡ
- A.a rheostat
- B.a balancing coil
- C.changing field excitation
- D.adjusting the governor settings
- A.ISM
- B.DOC
- C.SMC
- D.PSC
- A.worn connecting rod bearings
- B.worn engine cylinder liners
- C.high cylinder firing pressure
- D.stuck spring-loaded manhole covers
- A.the main engine in the stand-by condition
- B.auxiliary machinery in the stand-by condition
- C.dynamical equipments in the stand-by condition and could be used immediately
- D.A and B
- A.Voyage repairs
- B.Routine docking
- C.Damage repairs
- D.Conversion
- A.reduce the turbocharger operating temperature
- B.increase the pressure of the inlet air
- C.increase the density of the inter air
- D.reduce the blower operating temperature
- A.two
- B.three
- C.four
- D.five
- A.cooled to appropriate temperature
- B.warmed up gradually to appropriate temperature
- C.opened up and renewed
- D.ground and polished
- A.lower
- B.higher
- C.the lower
- D.the higher
- A.reduce load
- B.check your exhaust
- C.adjust cooling water temperature
- D.increase lube oil flow
- A.distance of the suction liquid level above the line of the pump
- B.distance the suction liquid level is below the center line of the pump
- C.force necessary to overcome frictional losses in the pump and piping
- D.amount in inches of mercury the total suction head is below atmospheric pressure
- A.The cylinder indicator cocks should be opened
- B.The sump lube oil scavenge pump should be secured immediately
- C.The explosion relief valves should be manually opened
- D.The crankcase should remain unopened until the engine has cooled
- A.Absence, substantial deterioration or failure of proper operation of the cargo deck area fire protection on tanker
- B.Absence, non-compliance or serious deterioration of lights, shapes or sound signal
- C.Absence or failure of proper operation of the radio equipment for distress and safety communication
- D.Absence in a watch of a person qualified to operate equipment essential to safe navigation, safety radio communications or the prevention of marine pollution
- A.proper fuel injection
- B.water in the fuel
- C.incomplete combustion
- D.burning of lube oil
- A.six consecutive starts
- B.eight consecutive starts
- C.ten consecutive starts
- D.twelve consecutive starts
- A.temperature
- B.velocity
- C.density
- D.viscosity
- A.the tiller arms
- B.the swivel blocks
- C.hunting gears
- D.the rams
- A.ring buoys are thrown overboard
- B.engines are stopped
- C.fire pumps are started
- D.life preservers have been issued to everyone
- A.should be gradually increased
- B.should be gradually reduced
- C.should be constantly kept
- D.should be varied up and down
- A.overspeed / overload
- B.overload / overspeed
- C.over mechanical load / over thermal load
- D.over torque / overspeed
- A.Overflow valve
- B.Reducing valve
- C.Balancing valve
- D.Reducing valve or balancing valve