乙类适任证书(轮机英语)模拟试题1

（轮机日志）22时30分，废气锅炉上、下排污，23时，废气锅炉用化学药剂吹灰。

（修理单）NO.2重油分油机解体检修，所有密封O形圈、轴承换新。

According to this passage, which of the following statements is true?

• A.In boiler and machinery spaces, there is the air conditioning
• B.In the boiler rooms the requirement of air volume should meet 25-50% of combustion requirement
• C.To maintain the comfort zone in the separate control room the air conditioning plant should be fitted
• D.The comfort conditions can be maintained in the engine room all the time

At the middle pressure and large air quantity,_________ is more suitable.

• A.an axial flow fan
• B.a radial flow blower
• C.a centrifugal fan
• D.an auxiliary blower

题干材料：Due to the large amount of heat picked up by the air in boiler and engine rooms, it would be impracticable to maintain ambient conditions within the comfort zone by air conditioning or any other means. The normal practice is to provide copious mechanical ventilation; in boiler rooms, the quantity is equated to the combustion requirements, while in a motor ship engine room the supply may be 25-50% in excess of the requirements of the engines. 

The axial flow fan is particularly suited to handle these large air volumes at the moderate pressures required, while of course the “straight-through” flow feature places it at an advantage over the centrifugal fan.

The increasing adoption of automation, with the provision of a separate control room makes less significant the fact that comfort conditions cannot be maintained in the engine room all the time. 

问题：Which of the following devices should be taken to maintain ambient conditions of the boiler and machinery space?

• A.air compressor
• B.air cooler
• C.air-conditioning plant
• D.mechanical ventilation plant

In a motor vessel, the air quantity which the engine room need is_______ of the requirements of the engines.

• A.less than 25-50%
• B.more than 125-150%
• C.more than 25-50%
• D.less than 125-150%

The ship security officer shall have knowledge and have received training, taking into account the guidance given in Part B of______.

• A.the ISM Code
• B.the ISPS Code
• C.the IBC Code
• D.the IGC Code

______ means the Government of the State whose flag the ship is entitled to fly.

• A.Assembly
• B.Organization
• C.Company
• D.Administration

The SOLAS Convention in its successive forms is generally regarded as the most important of all international treaties concerning the ______of merchant ships.

• A.pollution
• B.economization(节省)
• C.safety
• D.efficiency

In cleaning up an oil spill, the use of chemical agents would ______.

• A.absorb the oil for easy removal
• B.remove the oil from the water
• C.disperse or dissolve the oil in the water
• D.not affect the oil

One of the methods NOT usually allowed in cleaning up oil spills in the United States is ______.

• A.skimmers
• B.straw
• C.dispersants
• D.sawdust

When deciding the composition of the engineering watch, which may include _____appropriately, many factors shall be taken into account.

• A.satisfied engineers
• B.qualified ratings
• C.satisfied chief engineer
• D.qualified chief engineer

The officer in charge of the engineering watch shall ensure that at all times bridge orders relating to changes in ______of operation are immediately implemented(执行).

• A.ahead or astern
• B.fore or aft
• C.up or down
• D.speed or direction

_____ should not undertake any task which will interfere with the supervision duties relating to the main machinery and associated equipment.

• A.The watch keeping personnel
• B.The chief engineer
• C.The person on a bunker barge
• D.The duty deck officer

The Port Authorities, in accordance with the IMO resolutions have been carrying out _____ to enhance safety of ships.

• A.CPP
• B.FPP
• C.FSC
• D.PSC

The Port State Control officer may witness a fire drill carried out by the crew assigned to these duties on the ______.

• A.Navigation Log Book
• B.Engine Room Log Book
• C.Oil Record Book
• D.Muster List

The additional mark ______in the Classification Certificate for Machinery represents the propulsion apparatus is remotely controlled on the navigating bridge control station, and engine room is watched by duty personnel.

• A.BRC
• B.MCC
• C.AUT-0
• D.AUT-1

Oil Record Book Part I shall be provided to every oil tanker of 150 tons gross tonnage and above and every ship of 400 tons gross tonnage and above, ______oil tankers, to record relevant machinery space operations.

• A.as well as
• B.as long as
• C.rather than
• D.other than

Using a file without a handle may result in ______.

• A.your work becoming rounded
• B.injury to your hand
• C.overheating of the file
• D.pinning

When a vessel is in dry-dock, the vessel's engineers should ______.

• A.examine the condition of the propeller
• B.chip and paint all hull protection zincs
• C.install new docking plugs in all cofferdams
• D.inspect the hull for hogging or sagging

Obviously, for a given fuel oil, its pour point is ______its cloud point.

• A.lower than
• B.higher than
• C.as same as
• D.better than

CO2 extinguishes a fire by __________.

• A.a blanket of bubbles formed on the surface of the fire
• B.smothering
• C.isolating the heat from the fuel
• D.cooling

Which of the following components provides a direct source of seawater for the fire main system?

• A.Rose box
• B.Sea chest
• C.Sluice(闸式) valve
• D.Fire pump stuffing box

Which of the following is least likely to cause the ignition of fuel vapors?

• A.Static electricity
• B.An open running electric motor
• C.Loose wiring
• D.Explosion proof lights

Keep compartment ______ as the gas given off can be dangerous.

• A.in good order
• B.well clean
• C.well ventilated
• D.more room

A fire involving trash and paper waste would be classified as a ______.

• A.class A
• B.class B
• C.class C
• D.class D

______is a precaution which contributes to avoiding trouble under normal operating conditions.

• A.Constant inspection
• B.Keeping constant load
• C.Remaining constant temperature
• D.Varying speed

After the order '______' is given, the air system is shut down, the turning gear put in.

• A.Finished With Engine
• B.Stop The Engine
• C.Stand-by Engine
• D.Slow-down Engine

The order“______” means “Maximum maneuvering engine revolution for ahead propulsion.”

• A.Full Ahead
• B.Half Ahead
• C.Full Astern
• D.Half Astern

Current measuring instruments must always be connected in ______.

• A.series with a circuit
• B.parallel with a circuit
• C.series-parallel with a circuit
• D.delta with the shunt

Prior to any overhaul work on electric equipment, it is important to ensure the circuits are ___ .

• A.live
• B.dead
• C.excited
• D.on line

Electrical circuits are protected against overheating by means of a/an _______.

• A.circuit breaker
• B.amplifier
• C.diode （二极管）
• D.capacitor

A circuit breaker and a fuse have a basic similarity(类似) in that they both ______.

• A.can be reset to energize the circuit
• B.should open the circuit when overloaded
• C.will burn out when an over current flow develops
• D.should short the circuit when overloaded

The primary function of an electric motor is to ______.

• A.develop torque
• B.generate high voltages
• C.produce a magnetic field
• D.generate high electrical resistance

The part of the shipboard electrical system used to control the distribution of power to the branch circuits, is the ______.

• A.bridge control panel
• B.disconnect links
• C.main switchboard
• D.governor relay box

Equal power factors on paralleled AC generators are maintained by an automatic ________.

• A.governor control switch
• B.reverse power relay
• C.reverse current relay
• D.voltage regulator

Electric insulation is made of organic substances and so gradually ______with age.

• A.deteriorates(恶化)
• B.increases
• C.are fouled
• D.becomes better

The main generators are connected to ______.

• A.distribution boards
• B.section boards
• C.emergency switch boards
• D.main switch boards

It ______ for an emergency generator to require paralleling.

• A.is not usual
• B.is usual
• C.is necessary
• D.is not impossible

The number of cycles per second occurring in AC voltage is known as the ______.

• A.phase angle
• B.frequency
• C.wave form
• D.half mode

What will be the phase angle relationship of a six-pole, three-phase, rotating field generator?

• A.60
• B.120
• C.180
• D.360

Mooring winch should be equipped with mechanical brakes capable of holding ______.

• A.half the breaking strength of the mooring line
• B.the full breaking strength of the mooring line
• C.the maximum expected tension of the mooring line
• D.50% over the working tension of the mooring line

The pour point of lubricating oils is affected the most by which of the following?

• A.Extensive centrifuging
• B.Wax content
• C.Water content
• D.Acid content

In a ordinary cargo crane, ______is fitted to rotate the crane.

• A.the slewing motor
• B.the luffing motor
• C.the hoisting motor
• D.the fan motor

If an anchor windlass has been idle for some time, you should ______.

• A.repack all valve stems
• B.lubricate it prior to use
• C.replace the foundation bolts
• D.balance the warping heads

Among the basic categories of equipment, which of the following is used to convert hydraulic energy into continuous rotary motion?

• A.hydraulic pumps
• B.valves
• C.hydraulic cylinders
• D.hydraulic motors

What type of valve is used to direct the flow of hydraulic fluid?

• A.relief valve
• B.direction control valve
• C.stop valve
• D.pressure control valve

Cylinders of marine diesel engines are normally cooled by ___ .

• A.sea water
• B.fine mineral oil
• C.sanitary water
• D.fresh water

In a flash type evaporator, all saltwater heaters are vented through individual vent cocks to the ______.

• A.saltwater heater shell
• B.second-stage condenser
• C.atmosphere
• D.second-stage flash chamber

When a vacuum boiling evaporator works, the hot jacket water will pass over the tube stack and ___ the sea water passing through the tubes.

• A.dispose
• B.dissolve
• C.heat
• D.dissipates

Dirty oil must be ______before being used again .

• A.mixed with clean oil
• B.purified
• C.heated
• D.strained

Most marine biological sewage treatment plants consist of all the following statements except ______.

• A.aeration(通风) tanks
• B.settling tanks
• C.disinfection agent(消毒剂)
• D.anaerobic bacteria(厌氧菌)

Which is the pollution prevention equipment?

• A.booster pump
• B.evaporator
• C.incinerator
• D.cooler

The oil sludge is burnt in the ______onboard.I’ll show you the ashes.

• A.boiler
• B.main engine
• C.auxiliary engine
• D.incinerator

When started, a complete oily water separating unit is first filled ______. The oily water mixture is then pumped through the inlet pipe into the coarse separating compartment.

• A.with dirty water
• B.with clean water
• C.by oily water
• D.by mixed water

Sludge may be formed in the oil in the crankcase of a reciprocating air conditioning compressor as a result of ______.

• A.refrigerant bubbles in the lube oil
• B.refrigerant reducing the lube oil viscosity
• C.oxidation(氧化) of the lube oil from overheating
• D.reducing the floc or cloud point of the oil

A high rate of separation between oil and water is favored by ______.

• A.large size of oil globule(小球)
• B.low temperature
• C.high viscosity
• D.high flow rate

The heat identified by only a change in temperature is known as ______.

• A.sensible heat
• B.latent heat
• C.total heat
• D.residual heat

In a chilled(冷的) water air conditioning unit using a reciprocating compressor, the refrigerating effect of the primary refrigerant can be increased by ______.

• A.increasing refrigerant pressure in the coil
• B.increasing chilled water flow through the cooler
• C.sub-cooling the refrigerant in the condenser
• D.superheating the refrigerant in the compressor

The effective temperature of air is dependent upon ______. I. relative humidity II. air velocity

• A.I only
• B.II only
• C.Both I and II
• D.Neither I nor II

If a centrifugal pump is driven by a constant speed electric motor and produces a discharge pressure less than designed, the cause is probably ______.

• A.excessive pump speed
• B.excessive suction head
• C.worn wearing rings
• D.gross pump misalignment

An increase in rotor clearances in a rotary pump will ______.

• A.increase discharge pressure
• B.decrease pump capacity
• C.decrease pump cavitation
• D.decrease reaction ring clearance

The pressure of a liquid leaving the pump can be referred to as the ______.

• A.total head
• B.discharge head
• C.net positive suction head
• D.suction head

The discharge flow of a reciprocating pump is ______.

• A.steady
• B.in pulsation
• C.continuous
• D.large

A spur gear pump should be operated with the discharge valves ______.

• A.slightly opened
• B.throttled
• C.fully opened
• D.halfway opened

If the feed pump for an auxiliary boiler fails to deliver the feed water to the boiler, the cause may be ______.

• A.high steam pressure in the boiler
• B.abnormally high feed-water temperature
• C.abnormally high boiler water temperature
• D.steam demand exceeding feed pump capacity

______continuously extract the crankcase atmosphere, via a pipe system, and move it past a sensitive and accurate opacity(不透明性) measuring track.

• A.The oil mist detectors
• B.The smoke detectors
• C.An oily water monitor
• D.Oil discharge monitoring and controlling system

The maximum pressure developed by a waste heat boiler is determined by the main engine exhaust ______.

• A.gas composition
• B.gas temperature
• C.pressure
• D.timing

The fuel oil supply system to an automatic auxiliary boiler, will automatically shutdown if the boiler ______.

• A.steam demand is high
• B.salinity is high
• C.safety valve simmers(爆发)
• D.burner flame is extinguished

Immediately after any diesel engine is started, the engineer should check the ______.

• A.crankcase pressure
• B.lube oil pressure
• C.saltwater pressure
• D.exhaust temperature

A controllable pitch propeller on a diesel driven vessel eliminates the need for ______.

• A.friction clutches
• B.disconnect clutches
• C.reversing gears
• D.reduction gears

In a ______boiler the hot gases from the furnace pass through the tubes while the water is on the outside.

• A.water-tube
• B.fire-tube
• C.exhaust gas
• D.Composite

A dirty diesel engine oil filter element can best be detected by ______.

• A.visual inspection of the elements
• B.the pressure drop across the filter
• C.high lube oil sump temperature
• D.decrease in oil viscosity from the filter

A governor automatically controls engine speed by regulating ___ .

• A.fuel supply
• B.firing order
• C.engine load
• D.oil level

The lower section of a piston is called the ______.

• A.land
• B.crown
• C.skirt
• D.plate

Constant cooling the various components of diesel engine has a number of functions except for ______.

• A.good lubrication
• B.low thermal stress
• C.good mechanical properties
• D.acid corrosion

The cylinder oil is pumped into the cylinder (via non-return valves) when the piston rings pass the lubricating orifices, during ______.

• A.the upward stroke
• B.the downward stroke
• C.the power stroke
• D.the suction stroke

The main factor which determines the output of each cylinder is _____.

• A.the cylinder weight
• B.the cylinder bore
• C.the cylinder length
• D.the cylinder cover

The cetane number of a diesel fuel oil indicates its ______.

• A.ignition quality
• B.acid content
• C.heating value
• D.viscosity

Always ensure that the turning gear is______, even at the quay, the wave from other ships may turn the propeller and thus the engine.

• A.disengaged
• B.engaged
• C.assembled
• D.disassembled