我
- A.vibration
- B.watertight integrity
- C.speed droop
- D.reactive power
- A.0.967
- B.0.033
- C.0.031
- D.0.969
- A.air from contacting the oil vapors
- B.permitting re-ignition boiling of the heated oil
- C.spontaneous combustion below the oil surface
- D.toxic fumes from escaping to the surface
- A.temperature
- B.pressure
- C.engine speed
- D.all of the above
- A.detect the temperature
- B.detect the pressure
- C.heat the refrigerant
- D.accelerate the refrigerant
- A.makes the experts to judge
- B.enables the experts to judge
- C.make the experts judging
- D.enable the experts to judge
- A.bottle
- B.injector
- C.piston
- D.barrel
- A.I
- B.II
- C.I + II
- D.III
- 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.air or water in the furnace
- B.combustion pulses
- C.fuel oil pump failure
- D.flame failure
- A.a modern diesel engine, a turbine wheel
- B.a modem diesel engine, exhaust gases
- C.a compressor, an exhaust gas turbocharger
- D.a compressor, a turbine wheel
- A.open, the minimum components
- B.open, the high cooling efficiency
- C.central, there are more coolers and a extra set of pumps
- D.central, there is only one component contacts seawater
- A.Distillation is the process of boiling seawater to produce vapor which is condensed into fresh water
- B.Evaporation is the second part of the distillation process where brine is removed
- C.Brine is the result of condensed sea water vapor
- D.Distillate is the product resulting from the evaporation of fresh water vapor
- A.heat, gas, and flames
- B.fuel, heat, and oxygen
- C.heat, nitrogen, and fuel
- D.fuel oil, nitrogen, and oxygen
- A.the inlet valve
- B.the outlet valve
- C.both the inlet valve and the outlet valve
- D.the pump inlet valve
- A.cause loss of hydraulic oil from the system
- B.result in extreme damage to the pump
- C.cause damage to the pump ff not continually drained from the pump casing
- D.result in the system high side pressure to substantially drop off
- A.the low inertia
- B.the high inertia
- C.the low velocity
- D.the high velocity
- A.injection pressure
- B.shape of combustion space
- C.turbulence in combustion space
- D.all of the above
- A.masters
- B.chief engineers
- C.crew
- D.all personnel
- A.cold intake air
- B.excessive compression pressure
- C.excessive cylinder lubrication
- D.a light load
- A.condenser
- B.regurgitate
- C.evaporator
- D.boil coil
- A.To satisfy
- B.To be satisfied
- C.After satisfying
- D.After being satisfied
- A.radiated through the engine block
- B.transferred to water cooled cylinder walls
- C.conducted through the piston crown
- D.transferred to escaping exhaust gases
- A.one slip-ring
- B.two sliprings
- C.three sliprings
- D.four sliprings
- A.Centrifugal
- B.Reciprocating
- C.Gear
- D.Rotary
- A.a gas mask suitable for protection against each refrigerant used, or a self contained breathing apparatus must be provided
- B.it is the sole responsibility of the chief engineer to ascertain that all members of the engineering department are familiar with the use of gas masks or breathing apparatus
- C.spare charges shall be carried for at least 50% of each size and variety of gas masks and/or self contained breathing apparatus
- D.all of the above
- A.the firing pressure in the cylinder
- B.a metering helix inside the pump
- C.varying the physical length of the plunger stroke
- D.varying the clearance between the injector cam and the injector rocker arm
- A.free
- B.fastened
- C.broken
- D.stuck
- A.cylinder covers
- B.lubricating space
- C.crosshead
- D.exhaust manifold
- A.ignition may be delayed
- B.fuel economy is not affected
- C.exhaust gas temperature will be unchanged
- D.the exhaust will be clear
- A.Low cooling water outlet temperature
- B.High lube oil pressure
- C.Low lube oil temperature
- D.Low starting air pressure
- A.box temperature solenoid valve will close
- B.expansion valve will close
- C.compressor will shutdown
- D.king valve will open
- A.All scuppers plugged by carpenter
- B.Tanks sounded from time to time
- C.Watch kept for leakage
- D.Take oil samples
- A.becomes slack
- B.can not be paid out unless the brake is overhauled or recover wire unless manually operated
- C.will be let out because the brake is out of work
- D.may be pay out due to no power
- A.welding brackets across both ends of the crack
- B.chipping out and slot welding the entire crack
- C.drilling a hole at each end of the crack
- D.cutting a square notch at each end of the crack
- A.Any internal transfer of oil cargo during a voyage
- B.The discharge overboard in port or at sea of any bilge water accumulated in machinery spaces
- C.The loading or unloading of any or all oil cargo
- D.All of the above
- A.scaled
- B.worn
- C.deformed
- D.rested
- A.delivering more air into the cylinder than it would normally receive during an ordinary charging process
- B.forcing the products of combustion out of the cylinder with the fresh air charge
- C.collecting the air charge at the cleaner
- D.combustion and expansion of hot gas
- A.prevent piston ring wear
- B.shorten the ring break-in period
- C.prevent cylinder liner glazing
- D.appear slick and glazed
- A.starters
- B.pressure switches
- C.pressure
- D.water
- A.Orsat apparatus
- B.flame safety lamp
- C.Halide torch
- D.combustible gas indicator
- A.charge air receiver
- B.scavenging air belt
- C.turbine
- D.air cooler
- A.Class A
- B.Class B
- C.Class C
- D.Class D
- A.maintain alignment when the ship’s hull is working in heavy seas
- B.ensure engine vibrations correspond to the natural frequency of the hull
- C.permit the engine to expand away from the driven equipment as the engine heats up and expands
- D.maintain engine thrust bearing clearances
- A.in such cases, the air supply is no longer optimal, the thermal load will be higher
- B.governor hunting will occur
- C.torsional vibrations as other mechanical vibrations may occur
- D.all of the above are correct
- A.higher than the bus frequency
- B.lower than the bus freouencv
- 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.a worn water pump
- B.not enough coolant
- C.air in the cooling system
- D.all of the above
- A.a stuck solenoid valve
- B.a shortage of refrigerant
- C.too much oil in circulation
- D.too much superheat
- A.broken down
- B.stuck
- C.oil leakage
- D.carbonized
- A.wood
- B.oil
- C.electrical equipment
- D.magnesium
- A.increased
- B.reduced
- C.unchanged
- D.None of the above
- A.Condenser leakage
- B.A shortage of liquid refrigerant
- C.Excessive frost on the evaporator
- D.Not enough condenser cooling water
- A.increase the density of the intake air
- B.decrease turbocharger power usage
- C.reduce exhaust gas temperature
- D.compensate for turbocharger PRM fluctuations
- A.function when the rudder is amidships
- B.relieve excess whip pressure from the hydraulic oil system
- C.protect the piping assembly from external rudder shock
- D.relieve excessive telemotor pressure
- A.has to be handled
- B.may be handled
- C.has being handled
- D.will be handling
- A.bridges
- B.recesses
- C.rears
- D.ridging
- A.more favorable treatment
- B.less favorable treatment
- C.no more favorable treatment
- D.the most favorable treatment
- A.Vapor pockets formed in the suction flow stream
- B.Rough easing volute surfaces
- C.Worn wearing rings
- D.Heavy fluid in the flow stream
- A.freeze on the expansion valve seat and reduce the flow of liquid refrigerant
- B.emulsify the oil in the condenser
- C.freeze in the king valve
- D.clog the oil trap
- A.close Fan and Humidifier at the same time
- B.firstly close Fan and then close humidifier immediately
- C.firstly close humidifier and then close Fan immediately
- D.firstly close humidifier and then close Fan after 30 seconds
- A.use self-contained breathing apparatus
- B.use various types of portable fire extinguishers
- C.effect a rescue in a smoke-filled space wearing breathing apparatus
- D.All of the above
- A.cetane number
- B.pour point
- C.viscosity temperature
- D.quality of the oil
- A.amount of scavenge air to the cylinder
- B.quality of fuel injected
- C.viscosity of the lube oil
- D.compression ratio of the piston
- A.corrosion on the gears
- B.excessive gear speed
- C.dirt in the oil
- D.misalignment of the gears
- A.well
- B.good
- C.excellent
- D.respectively
- A.the burning of the fuel; medium shaft
- B.fuel spray; fresh air
- C.fuel; fuel spray
- D.the burning of the fuel; the burned gas mixture
- A.stationary/rotate
- B.stationary/stationary
- C.rotate/stationary
- D.rotate/rotate
- A.increases as the square of the current
- B.decreases as the square root of the current
- C.remains the same, as it is independent of current flow
- D.increases in direct proportion as the current
- A.microscopic steel shavings
- B.abrasive waste
- C.anti-oxidant compounds
- D.oxidation by-products
- A.holding the discharge valve open
- B.relieving the intercooler pressure to the atmosphere
- C.using an enlarged, permanently opened clearance expansion space
- D.a pre-charged accumulator
- 71
-
While engine is in operation the piston moves up and down, thus causing the rotation of the _____.
- A.crankcase
- B.slipper
- C.cam housing
- D.crankshaft
- A.manoeuvring operations
- B.bad combustion
- C.cooling
- D.mooring trial
- 73
-
Which of the following statements represents the main difference between a relay and a contactor.
- A.Contactors control current and relays control voltage
- B.A relay is series connected and a contactor is parallel connected
- C.Contactors can handle heavier loads than relays
- D.Contactors are made from silver and relays are made from copper
- A.low-half, cast iron; top-half, heat-resistant steel
- B.low-half, aluminum; top-half, stainless steel
- C.piston skirt; cast iron; piston crown; heat-resistant steel
- D.piston skirt; aluminum; piston crown; stainless steel
- A.fuel supply
- B.firing order
- C.engine load
- D.oil level
- A.turn the flywheel
- B.reduce friction
- C.overcome inertia
- D.ignite the fuel
- A.must churn the oil in the sump
- B.is connected to the propeller shaft
- C.is driven at the highest RPM
- D.compensates for alignment variations between the engine and pinion gear
- A.purifier
- B.oil/water separator
- C.incinerator
- D.distiller
- A.Excessively early injection timing
- B.Combustion knock
- C.Leaking piston rings
- D.Light load
- A.your work becoming rounded
- B.injury to your hand
- C.overheating of the file
- D.pinning
- A.to inject cleaning additives when the bilges are extremely dirty
- B.when the main condenser becomes fouled, in order to provide additional cooling water circulation
- C.to connect the rose box to the independent bilge suction
- D.if the bilges become flooded and they can not be emptied by any other means
- A.Speed
- B.Excessive knowledge or skill
- C.Human error
- D.Excitement
- A.a warp end
- B.a mooring winch
- C.a worm gear
- D.a barrel
- A.overhaul
- B.running
- C.blowing down
- D.All of the above are correct
- A.injection pump plungers stuck or worn
- B.low compression
- C.solenoid stuck open
- D.fuel tank too full
- A.dynamometer
- B.power factor meter
- C.three-phase motor
- D.polyphase voltmeter
- A.(1) only
- B.(2) only
- C.both (1) and (2)
- D.neither (1) nor (2)
- A.abandon ship
- B.dismissal from drills
- C.fire and emergency
- D.lower lifeboats
- A.Commence draining that tank as quickly as possible
- B.Seal off all vents to that tank
- C.Activate the CO2 system to that tank
- D.Shut off the steam heating coils
- A.main stem stop valve
- B.auxiliary steam stop valve
- C.feed check or control valve
- D.blow down valve
- A.improve skirt lubrication
- B.allow for expansion
- C.transmit forces evenly
- D.improve the piston seal
- A.quantity of fuel to be received
- B.flash point of the fuel as it is received
- C.fuel temperature as it is received
- D.viscosity of the fuel being received
- A.cross-head
- B.cylinder
- C.connecting rod
- D.spark plug
- A.Piston wrist pin bushing
- B.turbine bearing
- C.Spring bearing
- D.Diesel engine main bearing
- A.propeller
- B.flying wheel
- C.main engine
- D.crankshaft
- A.mechanical energy to kinetic energy to potential energy
- B.mechanical energy to potential energy to kinetic energy
- C.potential energy to mechanical energy to kinetic energy
- D.kinetic energy to mechanical energy to potential energy
- A.operated manually once an hour
- B.operated until the engine has started
- C.placed into operation only at maximum load
- D.adjustable to meet lubrication requirements
- A.When it is a D.Cmachine
- B.When it is an A.Cmachine
- C.Any machine that operates on over 100 volts
- D.Only when working on wet steel plates
- A.by cooling sea water
- B.by heating sea water
- C.by evaporation of sea water
- D.by purifying sea water
- A.Ammeter and changeover switch
- B.Speed governor device
- C.Synchroscope
- D.Wattmeter
- A.Current and voltage may be in phase
- B.Current may lead the voltage
- C.Current may lag the voltage
- D.All of the above
- A.land
- B.skirt
- C.crown
- D.plate
- A.lower the no-load RPMs
- B.provide more air for combine with the fuel
- C.increase the no-load RPMs
- D.provide more fuel combine with the air
- A.fresh water
- B.fresh air
- C.salt water
- D.artificial respiration
- A.one automatic drain serving both containers
- B.two air starting containers of approximately equal size
- C.one control air container and one starting air container
- D.one additional means of starting the main engine
- A.governor sensitivity
- B.governor promptness
- C.speed droop
- D.isochronous governing
- A.to send
- B.to be sent
- C.for being sent
- D.being to send
- A.the same as
- B.much larger than
- C.less than
- D.equals
- A.The six-way valve opens
- B.The steering service pump motor is stopped
- C.The follow-up gear takes the pump off stroke
- D.The cylinder relief valves bypass oil to the suction side the pump
- A.increase discharge pressure
- B.increase suction vacuum
- C.develop pulsation flow
- D.keep a steady rate of flow
- A.waterline
- B.freeboard deck
- C.Plimsoll mark
- D.amidships section
- A.Heat is given off from a high temperature region known as a heat sink
- B.Heat transfer rate is affected most by the size of the heat sink involved
- C.Heat transfer rate is affected most by the temperature difference between the heat source and the heat sink
- D.Heat transfer by radiation will occur only by mass motion of a fluid substance
- A.Dirty lube oil filter
- B.Too much piston ring wear
- C.High lube oil viscosity
- D.Low lube oil temperature
- A.Injection pressures
- B.Control air supply pressure
- C.Cooling water flow through after-coolers
- D.Lube oil temperature
- A.pump must always be primed
- B.volute must impart a radial and rotary motion of the water suction side
- C.connection must guide the liquid to the lantern rings
- D.stuffing box should not be allowed any water leakage
- A.Combustion gases flow through the tubes
- B.Flames impinge on the tubes
- C.Combustion occurs in the tubes
- D.Water flows through the tubes
- A.diesel oil instead of fuel oil
- B.fuel oil instead of diesel oil
- C.diesel oil instead fuel oil
- D.fuel oil instead diesel oil
- A.(1)-(2)-(4)-(3)-(5)
- B.(1)-(4)-(2)-(3)-(5)
- C.(1)-(3)-(2)-(4)-(5)
- D.(1)-(5)-(4)-(2)-(3)
- 119
-
The purpose of the compensating adjustment used in a diesel engine hydraulic governor is to ______
- A.compensate for low oil level
- B.increase governor promptness
- C.prevent governor hunting
- D.limit engine load
- 120
-
A warp end may be fitted for operating the derrick topping wire which adjusts the derrick _____.
- A.length
- B.slack
- C.height
- D.rotation direction
- A.without switches on it
- B.with insulated switches and no exposed terminals
- C.without circuit breakers
- D.without safety hand nails nor rubber mats
- A.liquid in the cylinder
- B.low compression in the cylinder
- C.high exhaust temperature
- D.poor fuel penetration
- A.all ballast is processed through the oily water separator
- B.ballast is taken on and discharged through a separate main deck riser
- C.ballast and cargo tanks are separated by cofferdams
- D.all ballast lines, tanks, and pumps are independent of those used for oil
- A.check the air filter for dirt
- B.check for an exhaust leak
- C.check the cooling water temperature
- D.notify the bridge that you are going to shut the engine down
- A.Distiller air ejector cooling medium
- B.Saltwater heater discharge
- C.First-stage internal feed box
- D.Second-stage internal feed box
- A.At the designed operating temperature, the liquid refrigerant charge has changed to a vapor
- B.The liquid refrigerant tends to collect at the bellows or diaphragm and reduces the valve sensitivity
- C.The sensing bulb is empty of liquid refrigerant charge at the designed operating temperature
- D.The sensing bulb is never emptied of liquid refrigerant under normal operating conditions
- A.frequency
- B.number of phases
- C.phase rotation
- D.All of the above
- A.coke deposits
- B.cylinder water temperature
- C.asphalt in fuel oil
- D.lub oil
- A.spray pipes
- B.demisters
- C.condensers
- D.splash baffles
- A.oil
- B.sea water
- C.refrigerant
- D.fresh water
- A.delivering the same quantity of fuel to each cylinder for each power stroke according to engine load
- B.maintaining the metering adjustment for a reasonable period under all load conditions
- C.timing fuel injection to obtain maximum power and good fuel economy
- D.distributing the fuel to all parts of the combustion chamber for proper combustion
- A.finished with engines
- B.stop
- C.stand by
- D.full ahead
- A.the inlet valve is open
- B.the exhaust valve is open
- C.both valves are close
- D.both valves are open
- A.transmitter
- B.tele-motor
- C.hydraulic ram
- D.hydraulic cylinder
- A.double-acting engine
- B.opposed pistons engine
- C.single-acting engine
- D.horizontal acting engine
- A.bosses
- B.through bolts
- C.machine-turned recesses
- D.long studs
- A.slightly less than the line frequency
- B.the same as the line frequency
- C.slightly greater than the line frequency
- D.All of the above
- 138
-
Which of the following conditions could contribute to the cracking of a diesel engine cylinder head?
- A.Leaking seal ring
- B.Insufficient heat transfer from the exhaust valves
- C.Block cooling water passages to the head
- D.Excessive scavenging air provided to the engine
- 139
-
_____ power is the power developed within the cylinder and can be measured by an engine indicator.
- A.The shaft
- B.The mechanical
- C.The electric
- D.The indicated
- 140
-
Each cylinder has one starting valve which is usually opened by air pressure and closed by _____.
- A.nuts and bolts
- B.new joints
- C.spring force
- D.sealing rings
- A.commercially available
- B.commercially
- C.commercial available
- D.commerce available
- A.slack enough to allow slight leakage of fluid
- B.slightly clocked
- C.brought up tight so as not to allow any leakage
- D.fitted with a relief valve
- A.slight acidity
- B.slight alkalinity
- C.excessive alkalinity
- D.excessive acidity
- A.noise coming from that air starting valve
- B.continuous operation of the starting air compressor
- C.zero air pressure in the air starting system
- D.overheated starting air pipe to the cylinder head
- A.loose expansion valve control bulb
- B.low differential setting on the H.Pcutout
- C.blown fuse in the motor circuit
- D.faulty suction pressure regulator
- A.exhaust
- B.air box pressure
- C.brake main effective pressure
- D.all of the above
- A.(1) and (2)
- B.(1) and (3)
- C.(2) and (3)
- D.(1), (2) and (3)
- A.high exhaust temperature
- B.high lube oil temperature
- C.low turbo-charger speed
- D.low cooling water temperature
- A.fuel-air ratio
- B.compression ratio
- C.fuel rack
- D.viscosity index
- A.Spark plug
- B.Heat of compression
- C.Carburetor
- D.Glow ping
- A.crankcase
- B.cylinder
- C.scavenge box
- D.piston
- A.piston crown
- B.piston groove
- C.piston skirt
- D.piston ring belt
- A.after the point is reached at which the failures begin to increase rapidly
- B.before the point is reached at which the failures begin to increase rapidly
- C.before the point is reached at which the failures begin to increase slowly
- D.after the point is reached at which the failures begin to increase slowly
- 154
-
When approaching a fire from win ward, you should shield firefighters from the fire by using_____.
- A.low-velocity fog
- B.high-velocity fog
- C.a straight stream of water
- D.foam spray
- A.moisturizing
- B.dehumidification
- C.dampening
- D.humidification
- A.18
- B.16
- C.22
- D.20
- A.acidity has increased
- B.viscosity has decreased
- C.demulsibility has improved
- D.foaming is guaranteed to occur
- A.An economizer
- B.An attemperator
- C.A water dram
- D.A down-comer tube
- A.principle
- B.medium
- C.instruction
- D.voltage
- A.open the steam line mot valve
- B.drain the steam cylinder
- C.close the steam cylinder drains
- D.open the liquid cylinder drains
