我
- A.less clearance
- B.dirty lube oil
- C.overload
- D.bearing wear
- A.120°apart
- B.160°apart
- C.180°apart
- D.360°apart
- A.bearing knocks
- B.dropping of pressure of LO
- C.noises
- D.all the above
- A.degree of cylinder air turbulence
- B.firing pressure in the engine
- C.quality of fuel to be injected
- D.duration of the ignition delay period
- A.An air pump
- B.A compressor
- C.A fuel pump
- D.A priming
- A.the bearing near to the diesel engine
- B.the intermediate bearing near to the thrust bearing
- C.the intermediate bearing near to the sterntube
- D.the bearing located at the middle of the diesel engine and the sterntube
- A.Voltage
- B.Current
- C.Resistance
- D.Inductance
- A.programs
- B.progress
- C.members
- D.measures
- A.dispersant/detergent
- B.detergent/dispersant
- C.dispersant/dispersant
- D.detergent/detergent
- A.decrease the time required between cleanings
- B.removes all large and small foreign objects
- C.ensure a positive flow of oil at all times
- D.ensure that all lube oil has been treated twice
- 11
-
The amount of fuel injected in a particular time, or degree, of crankshaft rotation is termed _____.
- A.metering
- B.timing
- C.rate of injection
- D.rate of distribution
- A.Because the piston is exposed to very high temperature, it must be cooled
- B.The lower the piston cooling temperature is, the better it is√
- C.Both water and lube oil can be used as coolant
- D.One of the piston cooling methods is vibration cooling, with better effect
- 13
-
With Variable Injection Timing the start of injection may be _____ as the engine load is reduced.
- A.advanced
- B.retarded
- C.kept constant
- D.none of the above
- A.cooling only
- B.cooling and humidifying
- C.cooling and dehumidifying
- D.adiabatic cooling
- A.a keen sense of hearing
- B.rich theory
- C.communicating ability with others
- D.repetition work
- A.to pump off
- B.being pumped
- C.pumping out
- D.it pumping out
- A.at the compressor discharge
- B.at the compressor suction
- C.in the expansion valve
- D.in the receiver
- A.Distilled
- B.Distilling
- C.Boiling
- D.Boiled
- A.upper part of the receiver
- B.upper part of the condenser
- C.down stream end of the cooling coil
- D.outlet end of the condenser
- A.frequency meter
- B.voltage regulator
- C.governor control
- D.sychroscope switch
- A.Natural convection only
- B.Forced convection only
- C.Both natural convection and forced convection
- D.None
- 22
-
If a four-stroke/cycle diesel engine is running at 1550 RPM, the speed of the camshaft will be_____.
- A.525 RPM
- B.775 RPM
- C.1550 RPM
- D.1800 RPM
- A.crankshaft
- B.connecting rod
- C.cross-head
- D.main beating
- 24
-
When the follower is on the base circle of the cam, the pump plunger is at the _____ of its stroke.
- A.top
- B.middle
- C.bottom
- D.any of the above
- A.brushes
- B.slip rings
- C.commutators
- D.all of the above
- A.variable injection timing
- B.variable inlet tonnage
- C.vertical incoming tonnage
- D.vertical inlet tank
- A.half the engine speed
- B.twice the engine speed
- C.the engine speed
- D.four times the engine speed
- A.ballast water
- B.boiler water
- C.bilge water
- D.sewage water
- A.hot air
- B.hot boiler water
- C.cylinder water
- D.hot seawater
- A.to pay attention
- B.paying attention
- C.pay attention
- D.your paying attention
- A.purifies
- B.combinations
- C.concentrations
- D.filters
- A.Cylinder cover
- B.Main bearing
- C.The exhaust valve
- D.The piston movement
- A.Megohm meter, insulation light and synchroscope
- B.Synchroscope, synchro light and megohm meter
- C.Shore power switch, insulation light and synchroscope
- D.Megohm meter, insulation light and shore power switch
- A.add fluid that is the same color as the fluid in the reservoir
- B.add turbine oil because it is always a good substitute
- C.add any oil that has the same viscosity as the hydraulic fluid
- D.check the winch manufacturers instruction book
- A.variable stroke pumps
- B.multistage pumps
- C.positive displacement pumps
- D.triple-ported pumps
- A.smoky
- B.a little bit dense
- C.visible
- D.almost invisible
- A.its pressure and temperature are both lowered
- B.its pressure and temperature are both raised
- C.its pressure is lowered and its temperature is raised
- D.its pressure is raised and its temperature is lowered
- A.the vapor air mixture is too rich to burn
- B.an explosion may occur if a source of ignition is present
- C.the vapor air mixture is too lean to bum the upper explosive
- D.limit has been exceeded
- A.the chief engineer
- B.the engineer on cabin watch
- C.the bridge officer on watch
- D.the master
- A.Diesel engines have more advantages in comparison with gasoline engines
- B.Diesel engines have more advantages in comparison to gasoline engines
- C.Gasoline engines have more advantages in comparison with diesel engines
- D.Gasoline engines have more advantages in comparison to diesel engines
- A.free entry of air to the crankcase
- B.water entering the crankcase while engine wash-downs are being performed
- C.excessive oil leakage during periods of increased blow-by
- D.sub-cooling internal components
- A.removes combustible gases in the crankcase
- B.prevents the formation of combustible gases in the crankcase
- C.cools lubricating oil
- D.improves cold weather starting
- A.Slow speed diesel engines
- B.Medium-speed diesel engines
- C.Steam engines
- D.Gasoline engines
- A.Stray current
- B.Rated current
- C.Starting current
- D.Earth current
- A.defective solenoid valve
- B.dirty fuel nozzle
- C.grounded high tension lead
- D.faulty ignition cable connector
- A.sliding bowl bottom
- B.gravity disc
- C.separating disc
- D.scum valve
- A.fuel delivery pressure
- B.pump plunger diameter
- C.plunger control rack position
- D.total pump stroke
- A.Pressure-reducing valve
- B.Unloading valve
- C.Counterbalance valve
- D.Pressure-relief valve
- A.the propeller diameter
- B.the propeller radius
- C.the pitch angle
- D.the length of helix
- A.current
- B.voltage
- C.power
- D.frequency
- A.below 300
- B.above 1200
- C.between 300 to 1200
- D.below 1200
- A.which the sudden operational failure
- B.that the sudden operational failure
- C.the sudden operational failure
- D.the sudden operational failure of which
- A.piston skirt
- B.pinion
- C.crosshead
- D.compression rings
- A.area times the stroke
- B.area times the stroke, times the number of cylinders
- C.volume times the stroke
- D.volume times the stroke, times the number of cylinders
- A.60
- B.120
- C.180
- D.360
- A.governor
- B.safety valve
- C.reducing valve
- D.feed water regulator
- A.wrap the arm in a tight bandage
- B.soak the arm in hot salt water
- C.cover the burn with petroleum jelly
- D.put the burn in cold water
- A.trick wheel
- B.accumulator
- C.standby pump
- D.telemotor
- A.Fire point
- B.Flash point
- C.Specific gravity
- D.viscosity
- A.transmitter at the steering station and a receiver at the steering engine
- B.reversible motor at the steering station geared to the steering pumps
- C.small induction motor on the bridge which controls the redder through pulleys
- D.variable displacement hydraulic pump driven by a reversible DC motor
- A.can we solve
- B.we can solve
- C.we will solve
- D.can we solved
- 62
-
Which of the following statements describes the relationship between viscosity and specific gravity?
- A.Liquids with different viscosities will always have the same specific gravity
- B.Liquids with different viscosities will never have the same specific gravity
- C.Viscosity and specific gravity are directly proportional
- D.Viscosity and specific gravity are not related in that one does not define or limit the other
- A.air bottle
- B.air compressor
- C.crank case
- D.combustion chamber
- A.opening the exhaust ports
- B.placed on top of the engine along its centerline
- C.farthest from the cylinder head
- D.nearest to the cylinder head
- A.Needle
- B.Tapered roller
- C.Roller
- D.Ball
- A.The control equipment
- B.The power unit
- C.The transmission system
- D.The follow-up mechanism
- 67
-
Which of the valves listed should be used either in the fully opened or the fully closed position?
- A.A gate valve
- B.A globe valve
- C.Any check valve
- D.Any needle valve
- A.physical deformation
- B.state exchange
- C.chemical reaction
- D.coalescence
- A.apparent slip
- B.tree slip
- C.pitch
- D.propulsive efficiency
- 70
-
If _____ are taken at regular intervals, any unequal distribution of load will be easily found out.
- A.indicator diagrams
- B.nomo-gram
- C.temperature readings
- D.pressure readings
- A.Did you have No.4 cylinder repair
- B.Do you have No.4 cylinder repaired
- C.Didn’t you have No.4 cylinder repairing
- D.Didn’t you have No.4 cylinder repaired
- A.an electric system manager
- B.a sensing bulb at the tail coil of the evaporator
- C.pressure changes in the suction line
- D.failure of the king solenoid valve
- A.amount of temperature rise with no load
- B.temperature of the compartment where the motor is located
- C.normal operating temperature, less the room temperature
- D.amount of temperature developed by an operating motor
- A.an electric grinder
- B.a metal scraper
- C.a reamer
- D.a three-wing hone
- A.automatically controlled
- B.continuously manned
- C.off power
- D.none of the above is true
- A.exhaust gas pressure
- B.exhaust gas temperature
- C.speed
- D.load
- 77
-
The operation of paralleling two alternators requires the voltages to be _____ and also in phase.
- A.zero
- B.eliminated
- C.different
- D.equal
- A.low exhaust temperature
- B.low firing pressure
- C.fuel knock in each cylinder
- D.mechanical knock in each cylinder
- 79
-
Air leakage between the shaft and stuffing box packing in a centrifugal pump is prevented by _____.
- A.a compressed packing gland
- B.lantern tings between the packing rings
- C.a liquid seal
- D.the stuffing box gland
- A.paralleling
- B.series-mounting
- C.running
- D.control
- A.monkey
- B.donkey
- C.waste heat
- D.main
- A.full excitation
- B.load
- C.power factor
- D.number of poles
- A.Any leaks in piping, propeller shaft, machinery, tanks, will have to be repaired on the spot
- B.Any leaks in piping, propeller shaft, machinery, tanks, will have to be repaired on the next port of call
- C.Any leaks in piping, propeller shaft, machinery, tanks, will have to be repaired until the next stop
- D.Any leaks in piping, propeller shaft, machinery, tanks, will have to be at least patched up
- A.the trunking should be opened up
- B.should the trunking be opened up
- C.the trunking should not be opened up
- D.should the trunking not be opened up
- A.use
- B.release
- C.protect
- D.effect
- A.Air filters
- B.Fuel oil strainers
- C.Crank case oil level
- D.Pyrometer readings
- A.bottom-blow valve
- B.skin valve
- C.feed-check valve
- D.feed-stop valve
- 88
-
The thermal expansion valve controls the amount of refrigerant that is allowed to flow to the _____.
- A.compressor
- B.cooling coils
- C.condenser
- D.receiver
- A.cause blow-by
- B.chemically attack the piston skirt
- C.form. an emulsion of lube oil and water
- D.raise the piston temperature
- 90
-
Sacrificial zinc anodes are used on the saltwater side of diesel engine heat exchangers to _____.
- A.reduce electrolytic action on heat exchanger metals
- B.keep heat transfer surfaces shiny and clean
- C.prevent rapid accumulation of marine growth
- D.provide a protective coating on heat exchanger surfaces
- A.load limit settings
- B.idle speed settings
- C.speed limit settings
- D.speed droop settings
- A.scavenging
- B.starting
- C.cooling
- D.blowing
- 93
-
Refrigerant is normally sub-cooled in a refrigeration or air conditioning system condenser to _____.
- A.maintain adequate coil back pressure
- B.prohibit flashing in the liquid line
- C.reduce refrigerant volume in the system
- D.reduce compressor discharge line loading
- A.the oil feeding is stopped and replaced by admitting flushing water
- B.the flushing water feeding is stopped and replaced by admitting oil
- C.the feeding of dirty oil and flushing water is stopped
- D.the feeding of dirty oil and flushing water is admitted
- A.decrease only
- B.increase only
- C.decrease slightly then returned to original speed
- D.increase slightly then returned to original speed
- A.compressor
- B.condenser
- C.expansion valve
- D.evaporator
- A.Bulbs
- B.Bulks
- C.Flyweights
- D.Flywheels
- A.specific volume
- B.density
- C.viscosity
- D.calorific value
- A.scale
- B.sludge
- C.chemicals
- D.air
- A.excessively late fuel injection
- B.oil in the air charge
- C.water in the fuel
- D.injection continuing after the fuel charge is ignited
- A.the inlet port is opened by the up coming piston; the port is closed by the down going
- B.the inlet valve is opened by the down going piston; the inlet valve is closed
- C.the inlet port is opened by the down going piston; the port is closed by the up coming
- D.the inlet valve is opened
- A.pump entry branch
- B.outlet pipe
- C.impeller
- D.None of the above is true
- A.Crankshaft revolution
- B.Type of engine (diesel or gasoline)
- C.Distance a piston travels during a stroke
- D.Number of pistons
- A.both meters in series with the resistance
- B.both meters in parallel with the resistance
- C.the ammeter in series and the voltmeter in parallel with the resistance
- D.the ammeter in parallel and the voltmeter in series with the resistance
- A.not/but
- B.neither/nor
- C.either/or
- D.not only/but also
- A.smoother engine operation
- B.advanced fuel ignition
- C.increased fuel economy
- D.reduced engine power
- 107
-
Which of the following conditions indicates the dilution of diesel engine lube oil by fuel oil? .
- A.Water discharging from the water outlet of the lube oil purifier
- B.Fuel oil discharging from the water outlet of the lube oil purifier
- C.Lube oil discharging from the water outlet of the lube oil purifier
- D.A change in the lube oil viscosity
- A.surface fatigue
- B.fretting corrosion
- C.heavy overloading
- D.gear misalignment
- A.the suction
- B.the compression
- C.the removal
- D.the deliver
- A.octane number
- B.cetane number
- C.viscosity in Saybolt seconds
- D.air fuel ratio
- A.main bearings
- B.sea water
- C.cooling oil
- D.lower temperature fresh water
- A.Open the bilge pump for inspection
- B.Remove each of the manifold valves
- C.Remove only the manifold valve to the affected bilge-well
- D.Attempt to pump out another bilge well to determine if the entire system is affected
- A.inlet valves
- B.exhaust valves
- C.emergency valves
- D.run-return valves
- A.burned exhaust valves
- B.excessive spring compression
- C.spring surge
- D.worn valve seats
- A.improper fuel rack positing
- B.lengthy exhaust valve duration
- C.extend operation at light load
- D.excessively early injection timing
- A.low temperature hardening
- B.case hardening
- C.annealing
- D.tempering
- A.changed
- B.centrifuged
- C.filtered
- D.settled
- A.in series with the power source and load
- B.in parallel with the power source and load
- C.insuring correct polarity
- D.using the lowest range possible to prevent instrument damage
- A.for FP, once fitted, the position of the blades can also be changed in operation
- B.for CP, once fitted, the position of the blades can also be changed in operation
- C.the CP type has a relatively smaller hub compared with the FP propellers
- D.the FP type has a relatively larger hub compared with the CP propellers
- A.sliding piston rings
- B.engines camshaft
- C.small pumps
- D.forced feed system
- A.chromed
- B.welded
- C.galvanized
- D.bolted
- A.Reciprocating pumps
- B.Rotary pumps
- C.Centrifugal pumps
- D.Gear pumps
- A.ISM Code
- B.IOPP Code
- C.IMS Code
- D.ISPS Code
- A.relieves excessive fluid pressure
- B.takes the pump off stroke when the desired rudder angle is attained
- C.synchronizes wheel position with the rudder position
- D.returns the rudder to midposition when the wheel is released
- A.condition of the expansion valve
- B.moisture in the system
- C.condition of the compressor suction valves
- D.condenser temperature
- A.over-speed trip
- B.reverse power relay
- C.back pressure trip
- D.governor controls
- A.the running hours of the cooling water pump
- B.chief engineer’s order
- C.the main parameters of main and auxiliary equipment
- D.the position of the vessel
- A.the piston is just coming upward from the bottom dead center
- B.the piston has moved about one-fifth of the way up
- C.the piston has moved most of the way up and almost reached the TDC
- D.the piston has just past the TDC
- A.slow-speed diesel
- B.medium-speed diesel
- C.high-speed diesel
- D.constant-speed diesel
- A.intake valves
- B.carburetor
- C.exhaust ports
- D.injector nozzles
- A.cold condition
- B.stillness condition
- C.certain air pressure
- D.the surveyors supervision
- A.compression must be low for effective spark ignition
- B.compression must be low for required horsepower and torque generation
- C.compression must be low to prevent pre-ignition
- D.compression must be low to have effective pre-ignition
- A.forces
- B.enables
- C.makes
- D.is able to
- A.hydraulic steering
- B.follow-up steering
- C.remote control steering
- D.air controlled steering
- A.closely observe the pump discharge temperature
- B.close off the discharge valve, and watch for a rise in pressure
- C.momentarily close off the suction valve, and watch for a rise in pressure
- D.use a clamp on ammeter and compare the readings to past records
- A.scavenging action of the piston
- B.piston type vacuum pump taking suction off a differential manometer
- C.gland exhausting manometer
- D.crankcase exhaust fan
- A.during the valve overlap period
- B.with only the exhaust valve open
- C.at a pressure below atmospheric
- D.without cooling the cylinders or pistons
- A.jib stopper
- B.winch barrel
- C.slewing rim
- D.windlass
- A.Secure the burners then proceed to your assigned boat station
- B.Start the fire pump and establish flow to the fire main
- C.Open the guardian valve and standby to maneuver
- D.Open the master control valves on the fixed CO2 system
- A.natural circulation of the water in the water tube boiler is better than that in the fire tube boiler
- B.for the same output the water tube boiler will carry less mass of water compared with the fire tube boiler
- C.the water tube boiler will cost shorter time for steam raising
- D.the water tube boiler require lower skill in operating and maintaining
- A.Shortage of refrigerant oil
- B.Slight shortage of refrigerant
- C.Excessive condenser cooling water flow
- D.Faulty expansion valve
- A.keeping the terminals clean
- B.coating cable connections with petroleum jelly
- C.maintaining a trickle charge
- D.All of the above
- A.erosion
- B.corrosion
- C.pitting
- D.dezincification
- A.antiknock characteristics
- B.ignition qualities
- C.rates of vaporization
- D.viscosity
- A.no fuel will be delivered through the nozzle
- B.the nozzle will overheat and crack
- C.time of injection will change
- D.fuel will leak into the drain line
- A.Excessive fuel
- B.Higher than normal temperatures for star up
- C.Longer starting periods
- D.Higher than normal lube oil pressure
- A.Ⅰonly
- B.Ⅱonly
- C.eitherⅠorⅡ
- D.neitherⅠnor
- A.Hydrazine treatment of condensate
- B.Frequent compounding
- C.Chemical cleaning
- D.Bottom blowing
- A.charging
- B.supercharging
- C.starting
- D.scavenging
- A.strength
- B.dense
- C.percentage
- D.velocity
- A.determine the need for filter cleaning
- B.measure any change in oil viscosity
- C.prevent damage to the filter
- D.determine the need for batch filtration
- A.to decrease scale formation
- B.for better cooling effect
- C.for more economical purpose
- D.to raise vacuum
- A.either/or
- B.neither/nor
- C.such/that
- D.so/that
- A.either all the way open or all the way closed
- B.normally open
- C.throttled depending on load
- D.controlled by suction pressure
- A.Take all exhaust temperature reading
- B.Check the sump oil level
- C.Verify proper lube oil pressure
- D.All of the above
- 156
-
In a radial piston pump, reversal and control of fluid flow are accomplished by moving the _____.
- A.central valve
- B.radial plunger
- C.floating ring
- D.cylinder body
- A.starting air bottles
- B.diesel engines
- C.boilers
- D.refrigeration compressors
- A.an electrical interlock system
- B.an automatic paralleling trip switch
- C.the synchronizing oscilloscope
- D.the reverse current relay
- A.a sea water chest
- B.a change-over chest
- C.a buffer tank
- D.a three-way valve
- A.Extensive centrifuging
- B.Wax content
- C.Water content
- D.Acid content
