我
- A.checking the area for items that may catch fire
- B.that a fire watch be posted
- C.checking for the explosive gases
- D.all of the above
- A.flash point
- B.fire point
- C.upper explosive limit
- D.lower explosive limit
- A.be affected
- B.affect
- C.be effected
- D.effect
- A.Ship Survey Bureau
- B.CCS
- C.Maritime Safety Administration
- D.all of the above
- A.dropping lube oil for lubrication, reducing the pollution to the sea
- B.setting a temporary gravity oil tank and enhanced the position properly
- C.lubricating with the used lube oil
- D.lubricating with the fresh water and navigation in a lower speed
- A.discharge of ballast or cleaning water from fuel tanks
- B.sounding levels of all fuel tanks on a daily basis
- C.grade and specific gravity of all fuel oil carded
- D.fuel consumption rates on a weekly basis
- A.prevent an unsafe ship proceeding to sea
- B.prevent a ship threatening the marine environment
- C.fine the ships
- D.confirm a safe sailing
- A.The Contracting Governments
- B.The Port Authorities
- C.The Master
- D.The Company Security
- A.high mica condition
- B.low ambient temperature
- C.clogged ventilation ducts
- D.an open in the shunt field
- A.sub-boards
- B.main switchboards
- C.emergency switchboards
- D.distribution boards
- A.a less favorable inspection
- B.a more favorable inspection
- C.a less detailed inspection
- D.a more detailed inspection
- A.flushed with clean refrigerant oil
- B.purged with the refrigerant
- C.washed with an ammonia and alcohol solution
- D.grounded to compressor
- A.increase back pressure during the exhaust process
- B.facilitate periodic replacement of the valves
- C.reduce the pumping loss associated with scavenging
- D.reduce tension on valve springs
- A.Chemical energy
- B.Mechanical energy
- C.Thermal energy
- D.Electrical energy
- 15
-
A sudden power loss from a turbocharged and after-cooled diesel engine is an indication of a/an＿.
- A.turbocharger malfunction or failure
- B.crankcase exhauster overload
- C.overload on the intercooler
- D.obstruction in the engine cylinders
- A.avoid using liquid-cooled nozzles whenever possible
- B.avoid low cooling water temperatures
- C.avoid prolonged overloading of the engine
- D.make certain the gasket seal between the nozzle and cylinder head is tight
- A.stopping the flow of gas
- B.reducing the chemical chain reaction
- C.increasing the oxygen supply
- D.cooling below the autoignition point
- A.two fuel oil transfer pumps provided where one is to be independent of the main engine
- B.two fuel oil transfer pumps, with a combined capacity exceeding the maximum consumption of the main engine
- C.engine driven transfer pumps and only used in constant speed applications
- D.the capacity of the engine driven pump exceed the consumption rate of the engine to which it is attached
- A.fuel pump should be removed and all connections blanked off
- B.cylinder oil feed rate should be increased slightly above that used at normal sea speed
- C.cylinder oil feed rate should be reduced
- D.cylinder oil feed rate should be increased to the maximum flow capable of the metering pump
- A.insufficient lube oil circulating through the system
- B.excessive circulation of lube oil through the system
- C.insufficient refrigerant in the system
- D.an overworked compressor
- A.passing it through the expansion valve
- B.condensing refrigerant in the system condenser
- C.passing the gaseous refrigerant through the heat interchanger on the suction side of the compressor
- D.maintaining a high pressure on the systems receiver
- A.greater high temperature strength
- B.better heat conductivity
- C.greater weight per cubic inch
- D.increased resistance to wear
- A.bedplate, connecting rods
- B.crankshaft, the connecting rods
- C.frames, crossheads
- D.crankshaft, the cylinder
- A.an oily water separator
- B.a purifier
- C.a centrifugal compressor
- D.a clarifier
- A.built up propeller
- B.solid propeller
- C.controllable pitch propeller
- D.suction back propeller
- A.varying the D.Cexciter voltage
- B.varying the reluctance of the air gap
- C.regulating the speed of prime mover
- D.shorting out part of the armature windings
- A.clean report
- B.serious deficiencies
- C.clear grounds
- D.detention report
- 28
-
When you are transferring fuel oil to the setting tanks, precautions to be observed should include .
- A.plugging gooseneck tank vents to prevent accident overflow
- B.maintaining a high transfer rate until a slight trickle of oil is observed flowing from the overflow line
- C.sounding the tanks frequently and reducing the transfer rate as the level approaches maximum fill
- D.maintaining a supply of chemical dispersant to cleanup minor oil spills adjacent to the ship
- A.directly increase the pressure of the liquid being pumped
- B.directly increase the velocity of the liquid being pumped
- C.convert the potential energy of the liquid to kinetic energy
- D.separate air from the liquid being pumped
- A.assist in a quick cutoff of fuel injection
- B.allow oil backflow from the injector to the helix
- C.reduce fuel oil pressure between injection strokes
- D.meter the quantity of fuel delivered
- A.act as a shock absorber
- B.maintain the stored oil under pressure
- C.act as a base or foundation for the power unit
- D.eliminate pressure surges in the system
- A.Spring-centered valve
- B.Unloading valve
- C.Three-position valve
- D.Two-position valve
- A.Low lube oil temperature
- B.Dirty lube oil strainer
- C.Low lube oil pressure
- D.High lube oil temperature
- A.The safety valve escape piping should be disconnected from the valve body and a blank inserted
- B.The boiler vent valves should be opened
- C.All handhole/manhole covers should be tightened up as much as possible to preclude any leaks
- D.All of the above
- A.People can know the types of fluids in pipes by feeling with hands
- B.There are series of rings painted in the pipes to show various fluids
- C.Engineers should wear cards standing for ranks
- D.Engineer knows his own code very well
- A.Volute pump
- B.Diffuser pump
- C.Regenerative pump
- D.All of the above
- A.the sinking of tail shaft
- B.the clearance of stern bearing
- C.the total flexure of shaft
- D.main engine crankshaft deflection
- A.which governs the state of a variable
- B.which provides a visual and audible alarm
- C.which indicates values of controlled variables
- D.which measures the state of the controlled variable
- A.normal situations
- B.medium situations
- C.high threat situations
- D.special situations
- A.How they finished
- B.How did they finished
- C.That how they finished
- D.That how did they finished
- A.remove suspended and precipitated solids from the boiler water
- B.completely drain the boiler in an emergency situation
- C.prevent hardened scale deposits in the water drum
- D.remove floating impurities from the oily water surface
- A.ohms
- B.volts
- C.amps
- D.watts
- A.valve overlap
- B.volumetric efficiency
- C.turbulence of the air change
- D.fuel efficiency
- A.Ⅰ+Ⅱ
- B.Ⅱ+Ⅲ
- C.Ⅲ+Ⅳ
- D.Ⅰ+Ⅳ
- 45
-
Which features of a centrifugal pump reduce the need for renewing worn impellers and pump casings?
- A.Close radial clearance between impeller hub and casing
- B.Low rotational speed of impeller
- C.Removable end plate
- D.Replaceable impeller and casing wearing rings
- A.tire control plan
- B.fire drill
- C.muster list
- D.All of the above
- A.power of main engine
- B.turbine rotation speed
- C.speed of main engine
- D.exhaust temperature
- A.ship products survey
- B.notarization survey
- C.ship safety inspection
- D.counseling service and publishing ship name list
- A.the size of the holes in the fuel nozzle
- B.timing of the pump
- C.supply pressure to the pump
- D.shape of the combustion chamber
- A.No fuel will be delivered
- B.The maximum effective stroke will be attained
- C.The fuel delivered to the cylinder will be excessive
- D.The injection nozzle will overheat and carbonize
- A.controller
- B.governor
- C.instrument
- D.apparatus
- A.reduce engine horsepower output
- B.aid in silencing the exhaust noise
- C.increase the mean effective pressure
- D.contribute to effective cylinder scavenging
- 53
-
The main propulsion diesel continues running after you try to shut downYou should now attempt to＿.
- A.stop the combustion air supply
- B.engage the jacking gear
- C.secure the lube oil pump
- D.shut off the fuel at the day tank
- A.They are particularly suited for pumping high viscosity fluids
- B.They are started with the discharge valve opened
- C.The flow of liquid is developed by imparting energy due to the rotation of an impeller
- D.They are always mounted in a horizontal position
- A.starting diesel engines
- B.pneumatic control systems
- C.pneumatic tools
- D.supercharging air
- A.low compression of the fuel pumps
- B.incorrect timing of fuel pumps
- C.the starting air valves stuck
- D.air-locks in fuel oil pipeline
- A.A power end and fluid end
- B.A propeller and educator
- C.A volute and impeller
- D.A turbine and piston
- A.for the release of air
- B.for the release of water
- C.in order to the release of air
- D.because the release of air
- A.steering gear
- B.turning gear
- C.steering wheel
- D.turning cycle
- A.insufficient lubrication
- B.insufficient refrigerant
- C.excess refrigerant
- D.excessive opening of the expansion valve
- A.the start fails
- B.the fuel pumps will be put into operation
- C.the fuel valves are damaged
- D.the combustion process will take over
- A.system was overcharged with refrigerant
- B.high pressure switch was improperly adjusted
- C.expansion valve strainers were fouled
- D.suction valves were leaking slightly
- A.main stern stop valve
- B.auxiliary steam stop valve
- C.scum valve
- D.blow down valve
- A.steady
- B.in pulsation
- C.continuous
- D.large
- A.centrifugal pump is cheaper than reciprocating pump
- B.the size of centrifugal pump with same capacity is smaller than that of reciprocating pump
- C.centrifugal pump makes maintenance easier than reciprocating pump does
- D.all of the above
- A.Magnesium
- B.Paper
- C.Wood
- D.Diesel Oil
- A.ahead direction
- B.astern direction
- C.right-handed
- D.left-handed
- A.failure of the proper operation of emergency generator
- B.insulation of piping including exhaust pipes in engine room contaminated by oil
- C.improper operation of bilge of bilge of bilge pumping arrangements
- D.damaged sanitary pump
- A.Move the fuel control mechanism to the no fuel position
- B.Block the fuel supply by closing the master fuel valve
- C.Shut off the fuel supply and block the flow of intake air
- D.Relieve all pressure in the fuel system
- A.in the chill box
- B.before the receiver
- C.on the suction side of the compressor
- D.on the discharge side of the compressor
- A.prevent excessive cylinder liner wear
- B.reduce friction losses in the engine
- C.seal the space between the piston and the liner
- D.limit upward flow of lube oil into the combustion space
- A.remove oxygen from the area
- B.smother fire with foam
- C.smother fire with CO2
- D.cool fuel below ignition temperature
- 73
-
The exhaust system of a diesel engine is usually designed to remove exhaust gases and to ________.
- A.provide exhaust back pressure
- B.prevent exhaust smoke emissions
- C.power a reciprocating supercharger
- D.muffle exhaust gas noise
- A.3 years after making the first entry
- B.2 years after the last entry
- C.3 months after last entry
- D.3 years after the last entry
- A.welcome
- B.admitted in some special sea areas
- C.prohibited
- D.acceptable
- A.excessive mist density in the crankcases
- B.excessively high crankcase vacuum
- C.excessively high bearing temperature
- D.excessive carbon buildup in the lube oil
- A.It is lower than the ignition temperature
- B.It is the temperature at which a substance will spontaneously ignite
- C.It is the temperature at which a substance, when ignited, will continue to bum
- D.It is the temperature at which the released vapors will fall within the explosive range
- A.just
- B.nearly
- C.merely
- D.already
- A.pump
- B.engine
- C.turbine
- D.boiler
- A.Class "A
- B.Class "B"
- C.Class "C"
- D.Class "D"
- A.Exhaust temperature
- B.Lube oil level
- C.Lube oil pressure
- D.Water level in the expansion tank
- A.foundation
- B.seating
- C.entablature
- D.bedplate
- A.for starting diesel engines
- B.in pneumatic control system
- C.in pneumatic tools
- D.All the above are true
- A.a test valve
- B.an inspection valve
- C.a stop valve
- D.a non-return valve
- A.check cylinder lubrication prior to starting engine
- B.connect exhaust gas analyzers to determine engine efficiency
- C.pressure test cylinder heads to check for leaks
- D.remove moisture accumulations from cylinder prior to starting
- A.Fire pump and lube oil pump
- B.Lube oil pump and distilling plant
- C.Distilling plant and shaft alley door
- D.Shaft alley door and fixed CO2 release
- A.by an fuel valve
- B.through an inlet valve
- C.with an exhaust valve
- D.from an outlet valve
- A.in motion, providing a null input
- B.not in motion, thus providing a null input
- C.in motion, providing an input to place the main pump on maximum stroke
- D.in motion, providing an input to place the main pump at null stroke
- A.decrease
- B.increase
- C.be dismantled
- D.be reassembled
- A.has left
- B.had left
- C.has been away
- D.had been away
- A.the heat compressed fuel/air mixture in the cylinder
- B.the fuel igniter
- C.the fuel injector
- D.the fuel pump
- A.transfer heat from the cylinder to the piston
- B.scrape oil from the sides of the piston
- C.seal the combustion space from the crankcases
- D.prevent any piston contact with the cylinder liner
- A.the expansion valve will move toward the wide open position
- B.the expansion valve will move toward the closing position
- C.the feeler bulb will conveys the high temperature
- D.the superheat degree will raise
- A.self priming
- B.positive displacement
- C.reciprocating
- D.impeller
- A.closed, and no leakage permitted across the shaft packing
- B.closed, and only slight leakage permitted across the shaft packing
- C.open, and no leakage permitted across the shaft packing
- D.open, and only slight leakage permitted across the shaft packing
- A.the cylinder cover is cracked
- B.the injector holes is clogged
- C.the cams are not properly set
- D.fuel pump is leaking
- A.being bolted
- B.bolted
- C.bolting
- D.to be bolted
- A.release
- B.absorb
- C.develop
- D.regenerate
- A.distribution boards
- B.section boards
- C.emergency switch boards
- D.main switch boards
- A.more efficiently uses available engine power
- B.operates at a lower efficiency at a fixed speed
- C.produces the same torque at lower engine power
- D.develops its rated power at a lower speed
- A.the connecting rod
- B.large end bearing
- C.the main bearing
- D.the design
- A.increase the fuel oil temperature
- B.decrease the fuel oil temperature
- C.decrease the fuel oil supply pressure
- D.increase the air supply
- A.entirely constant pressure
- B.entirely constant temperature
- C.a combination of constant volume and constant pressure
- D.a combination of constant temperature and constant pressure
- A.return to a neutral position
- B.flood the evaporator
- C.open
- D.close
- A.Plugged injector nozzles
- B.Excessive fuel injection
- C.Very late injection timing
- D.Incorrect crankshaft clearance
- A.smoother pump operation
- B.overheating of the bearing
- C.reduced corrosion in the bearing
- D.increased pump capacity
- A.both of them are ignited by compressed air
- B.both of them are the forms of external combustion engines
- C.both of them have spark plugs
- D.the power is developed by the piston in the cylinder
- A.increase
- B.decrease
- C.fluctuate
- D.remain constant
- A.vent line
- B.overflow line
- C.feed line
- D.sounding tube
- A.Dissipate heat
- B.Trap foreign matter
- C.Separate air from the oil
- D.All of the above
- 111
-
If you observe smoke coming from the turbocharger of an auxiliary diesel engine, you should_____.
- A.check the air filter for obstruction
- B.check for an exhaust leak
- C.check the exhaust temperature
- D.secure the engine
- A.are less expensive
- B.require less maintenance
- C.can be started across the line
- D.offer a more effective means of controlling speed
- A.the clearance of the main bearing
- B.the play of the miler bearing
- C.the gap of the main bearing
- D.the tolerance of the main bearing
- A.suspended by wire slings in one comer of the shop
- B.wrapped in several layers of heavy paper or carboard
- C.supported by flat wood blocks on the workbench
- D.returned to the frame. as soon as the bearings are removed
- A.a flash generator
- B.a flash evaporator
- C.a vacuum boiling evaporator
- D.a boiler
- A.discharge is continuous
- B.it has no internal valves
- C.upon accidental closing of discharge valve, excessive pressure will not build up
- D.all of the above are true
- A.Hash point
- B.Viscosity
- C.Pour point
- D.Cetane number
- A.frosting of the liquid line
- B.higher than normal head pressure
- C.a clear sight glass
- D.abnormally cold reefer boxes
- A.Gasoline
- B.Water
- C.Lubricating oil
- D.sulphur compounds
- A.permissibly
- B.permissible
- C.no permissible
- D.not permissible
- A.clean the flame scanner photocell window
- B.Inspect and clean all solenoid valves
- C.lift the safety valves by hand
- D.Inspect for oil or water leaks
- A.capability of causing brittle fractures
- B.highly corrosive action on mild steel
- C.vapor cloud which reacts violently with saltwater
- D.toxicity at atmospheric pressure
- A.engine speed
- B.engine load
- C.intake manifold pressure
- D.atmospheric pressure
- A.insufficient speed
- B.cavitation
- C.excess discharge pressure
- D.excessive net positive suction head B
- A.measured
- B.recorded
- C.transferred
- D.controlled
- A.injector pumps
- B.positive displacement pumps
- C.centrifugal pump
- D.centripetal pumps
- 127
-
As a heat engine, _____ energy is the source of power by which the diesel engine can be operated.
- A.electric
- B.heat
- C.mechanical
- D.exhaust
- A.explosimeter
- B.oxygen indicator
- C.fresh air indicator
- D.All of the above
- A.The chief engineer
- B.The second engineer
- C.The third engineer
- D.The fourth engineer
- A.throttling the pressure line
- B.changing the speed of the rotor
- C.either A or B
- D.None of the above is tree
- A.inter cooler
- B.cylinder
- C.outlet pipe
- D.inlet pipe
- A.They make it easier to replace the pump shaft packing
- B.They can be economically replaced as they wear out
- C.They can be removed when it is necessary to lighten the weight of the pump
- D.They increase the strength of the shaft
- A.a high exhaust temperature
- B.a high smoky exhaust
- C.a high output
- D.a high compression
- A.lubricant
- B.coolant
- C.combustion product
- D.second refrigerant
- A.ignition failure
- B.oxygen corrosion of the fuel lines
- C.the pistons to seize
- D.blue smoke
- A.alternating current
- B.omnidirectional current
- C.direct current
- D.sinusoidal current
- A.round out
- B.round file
- C.reamer
- D.hole driller
- A.in order to
- B.because of
- C.so that
- D.so as to
- A.refreshing the air
- B.making person upset
- C.adjusting the air humidity
- D.adjusting the air temperature
- A.I only
- B.II only
- C.both I and II
- D.neither I nor II
- A.thinner
- B.thicker
- C.smoother
- D.rougher
- A.sliding bowl bottom
- B.bowl hood
- C.bowl
- D.filter units
- A.fixed pitch propellers
- B.uncontrollable pitch propeller
- C.constant pitch propellers
- D.variable pitch propellers
- A.scaled
- B.informed
- C.leaky
- D.deformed
- A.sliding block
- B.pintle
- C.reaction ring
- D.tilting box or swash plate
- A.after TDC
- B.before TDC
- C.after BDC
- D.before BDC
- A.lower than normal cylinder pressure and low exhaust temperature
- B.lower than normal cylinder pressure and high exhaust temperature
- C.higher than normal cylinder pressure and low exhaust temperature
- D.higher than normal cylinder pressure and high exhaust temperature
- A.line shaft bearings
- B.connecting rod beatings
- C.main bearings
- D.support bearings
- 149
-
In comparing engines of equal horsepower, higher exhaust gas temperatures occur in a/an_________.
- A.opposed-piston engine
- B.double-acting engine
- C.two-stroke/cycle engine
- D.four-stroke/cycle engine
