轮机部三管轮考试模拟题9(轮机英语)

Which of the following factors will have the greatest effect on the heating load within a conditioned space?

When comparing different fuels for different engines, the ignition quality of diesel fuel oils becomes a less critical consideration as ______________.

The PSCO would be justified in making a detailed inspection of all life-saving appliances, if he sees that ______.

Open the ______of inter cooler before starting an air compressor.

In usual marine applications, bellows joints are designed and fitted to accommodate straight line axial movement only and the associated piping requires adequate anchors and guides to prevent misalignmentAccording to the above sentence, which of the following statements is true?

In an electro-hydraulic steering gear system, when will the variable displacement pump be placed on stroke?

In order to inspect both piston and cylinder wall thoroughly, the cylinder cover should be taken off and the piston should be _____.

Diesel engine lube oil diluted with fuel oil is indicated by________.

Which of the following operational conditions will occur to the diesel engine lube oil at extremely high temperature?

The air reservoirs must have _____ fitted to prevent rupture in the event of fire.

Defective atomizer in a diesel engine will lead to .

At bottom dead center, the centerline of the connecting rod usually coincides with the___.

Cracks in the cylinders and cylinder covers may _____ unequal heating.

In a simple mechanical governor, the _____.

The need for insulation cleaning may be determined by _____.

A diesel engines crankcase oil level is found to be too highYou should suspect that _____.

Which of the following components are used to convert alternating current produced in the generator windings to direct current?

The valve best suited for throttling gas or liquid flow in a pipeline is the

Excessive circulation of the lubricating oil with the refrigerant in a refrigeration system will cause _____.

After fitting back in place the gear wheels, dont forget _____ them.

When the opening pressure of a diesel fuel injector is greater than that specified by the engine manufacturer，the ________.

_____ handle and instruments are on the front.

In a _____ the center screw is driven and the outer screws idle.

The function of diesel engine piston compression rings is to _____.

A constant output voltage from an AC generator is maintained by the _____.

Pyrometers commonly found on diesel engine exhaust systems, consist of________.

In a simple mechanical governor, the ______.

The refrigeration compressor in a water cooled refrigeration system is short cycling on the high pressure cutout switchOne reason for this could be the _____.

In heavy marine engine the practice is to drive the engine on____ which has previously been stored in starting air reservoirs.

In order to distribute the side pressures over a wide area of the cylinder walls and liners, which of the listed types of pistons are used in modem low pressure air compressors?

The mechanical efficiency of an engine _____ because losses occur in the form. of friction.

If the coolant temperature of a closed cooling water system for a diesel engine gradually increases, the trouble usually is ______.

If the valve tappets in a diesel engine are set at greater clearances than those specified by the engine manufacturer, those valves will _____.

The packing installed in the pump stuffing box is lubricated by _____.

The overcurrent relay _____ the motor contactor when the motor exceeds its rated current.

James Watt ______ the steam engine in 1796.

_____ device is provided to prevent starting air from being admitted to the cylinder before the reversing is completed.

Which of the following procedures should be carried out when a large, low-speed, diesel engine is operated with one cylinder secured? .

In a diesel engine, the time taken to heat the fuel particles, turn them into vapor, and bring about combustion is called _______.

A donkey boiler is _____.

The engine is reversed by axial displacement of the camshaftsIn order for this to be carried out, the cams are _____ with inclined transition faces.

In a shell-and-tube type hydraulic fluid cooler, the amount of heat transferred from the hydraulic fluid to the cooling water depends upon .

I find .

Bourdon Tube is probably the most commonly used _____ measuring instrument.

Gas turbines differ from steam turbines in that ______.

Two main lubricating oil pumps are usual and are obligatory in _____.

You can find the location of your abandon ship post by checking the _____.

Diesel engine starting difficulties due to cold intake air temperatures, can be overcome by using a/an＿.

CO2 extinguishes a fire by _____.

A device which prints out a permanent record of the plant operating conditions is known as the _____.

If the main engine starting consecutively failed ____ times, it should be found the cause before another starting

_____ can be found on most medium to large merchant vessels even if the main engine is either a steam turbine or 2-stroke crosshead engine.

A clearly visible beneath of RT-flex engines is their operation at all ship speedsThis is achieved by the superior combustion performance.

The expansion tank for a diesel engine closed cooling system is designed to maintain a constant head on the system and _____.

Which of the listed substances can be satisfactorily removed from diesel fuel by centrifuging?

When the garbage is mixed with some discharges having different disposal or discharge requirements, shall apply.

If a reciprocating air compressor has a knock occurring in frequency with its operating RPM, the cause is probably _____.

If a few injector spray holes become plugged, the result could be _______.

The intake ports of a two-strike/cycle diesel engine are opened and closed by the action of the _______.

Too much air in the furnace of an oil-fired boiler would be indicated by _____.

An example of class "A" fire is a/an .

Ammeters and voltmeters used in sinusoidal AC power systems indicate which of the following values of the waveforms measured?

By comparing the exhaust gas temperature of each cylinder, the operator can determine if the load is balanced throughout the engineThe device most commonly used is a________.

The essential part of the diesel engine, whose function is to convert the heat energy into the mechanical power, is the _____.

The emergency bilge suction or bilge injection valve is used to prevent _____ of the ship.

Water accumulation in the cylinder of a secured engine is an indication that the _______.

Line losses in a distribution circuit are kept to a minimum by _____.

With VIT unit the timing of fuel injection of an engine can be regulated automatically according to the _____.

The oil index of main engine should be controlled to prevent it from in heavy weather.

Passages are drilled in the crankshafts of diesel engines to provide lubricating oil to the _____.

The working cycle of a four-stroke diesel engine consists of four events: (1) compression; (2) expansion; (3) exhaust; (4) suctionThe correct sequence is _____.

For the proper control of the air temperature in an air conditioning system using chilled water circulation, which of the listed conditions should remain constant regardless of load changes? .

Some diesel engines are supercharged with a ____.

Voltage will always lead current in a/an _____.

If you find an extremely large refrigerant leak while using a halide torch, your flame will ___.

The vapors given off by heated fuel oil are flammable, explosive, and _____.

When making entries in the Oil Record Book, the date, operational code and item number shall be inserted in the appropriate columns and the required particulars shall be recorded _____ in the blank spaces.

Through a _____ pump, the liquid is transferred from the suction to the discharge by the mechanical variation of the volume of a chamber or chambers.

Inductance is the property of an electric circuit that _____.

It should be evident that the amount of fuel injected into the cylinder is dependent on the position of the helix relative to the ______.

An orifice-check valve placed in a hydraulic system is used to .

The voltage output of an A.Cgenerator is controlled by .

If a fire occurs in the boiler room because of a leaking fuel line to a burner, you shut off the fuel using the .

The cetane rating of diesel fuel is an indication of the ________.

Air compressor cylinder un-loaders enable the compressor to _____.

If a refrigeration compressor is short cycling on high head pressure, you should _____.

Insufficient end clearance on newly fitted piston rings in a diesel engine will cause the rings to＿.

An increase in load on a diesel engine results in _____ of speed of the crankshaft.

A turbocharged diesel engine will have an intake manifold pressure____________.

Moisture in a D.Cmotor would cause _____.

In general, the oil mist detectors include a built-in heating unit and a compact plug for electrical connectionThe function of heating unit is to ____.

The officer in charge of the engineering watch shall notify the chief engineer without delay .

Shore power must be_____ during dock repair.

The work fuel does in each working cycle can be obtained by taking the _____.

Current changing in direction and rising and falling in value is _____.

The way to reduce _____ is to build up a film of lubricant between any two surfaces that rub against each other.

The bearing shells depend on the accuracy of _____ to held them in a truly circular shape.

If a vessel moored at a U.Sterminal does not comply with coast guard pollution prevention regulation, it may be detained by the ______.

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

In the cylinder of a diesel engine fuel is ignited by the________.

An electrical device which prevents an action from occurring until all other required conditions are met is called a/an _____.

The design of _____ is similar to that of the main bearing.

If you must enter a room or compartment to combat the fire, keep an escape path _____.

On an electro-hydraulic steering gear, which of the listed devices will keep the rudder from over-traveling the bridge signal?

A compressor should never be stopped _____.

In a unit injector the amount of fuel that will be forced through the spray nozzle on each stroke of the plunger depends on ________.

The internal part of the boiler, if found _____, has to be chemically washed by yard.

”Clover-leafing”is a term used to describe corrosive wear at several separate points around liner circumference- i.ein some cases the liner bore may assume a “clover-leaf” shape.

During inspection of the machinery space, which of the following statements points to an unsatisfactory organization of the systematic maintenance?

A built-up exhaust valve is one in which ______.

Except in rare cases, it is impossible to extinguish a shipboard fire by _____.

If a fire occurs in the boiler room as a result of a leaking fuel line, you should FIRST _____.

When in operation, it is unavoidable that a small amount of oil _____ through leakage, and in order to compensate for these leaks the system is connected to a feed pump.

In the event of a fire, the doors to a stair tower must be closed to prevent the spread of fire by _____.

When the incinerator is stopped, which of the following is wrong?

Which of the engine components listed increases air charge density and helps to improve engine operating efficiency?

It is important to use only pure lead and to choose a thickness of wire which is greater than the normal allowable clearance but _____ this amount.

Which of the following statements represents the function of the compression rings installed at the top of a diesel Engine piston?

A centrifugal compressor’s purge recovery unit .

At an unsheltered anchorage the chief engineer officer shall consult with the master whether or not to maintain an underway watch“An underway watch” means______.

The Ship Security Plan should be submitted to____ for approval.

Auxiliary boilers are divided into several classifications, one of which is .

A fire can be extinguished by removing _____.

Proper filtering and straining of diesel fuel is important because the .

During check on top clearance in main bearings, turn the crankthrow for the relevant cylinder unit to ____ and stop the lube oil circulating pump.

In a bypass type lubrication system for a diesel engine, the dirty oil line to the centrifuge should be taken from the _____.

The unit of electrical resistance is the _____.

In order to increase the wearing resistance, the cylinder liner surfaces are sometimes _____.

A switchboard, for a AC electrical distribution system, will be provided with which of the following components _____.

Seawater may be used for drinking water _____.

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

The separation of impurities and water from _____ is essential for good combustion of diesel engines.

Heavy soot accumulations in an auxiliary boiler could be caused by .

_____ are used to limit the pressure in any particular portion and mainly control the pressure after the valve.

The exhaust valve is opened at about the same time _____ the air inlet ports are opened.

_____, we kept removing the pistons.

The mechanical efficiency of an engine is always less than 100% _____ losses occurring in the form. friction.

A loud clicking noise from the valve compartment of an operating diesel engine would indicate_________.

The indicated power of an engine can be obtained by taking the _____.

The cross-head shoes are white metal lined, grooves being cut horizontally on the face of the white metal to ensure _____.

The air required for combustion is taken from the engine room through a filter fitted on the turbochargerThis reduces the risk for too and contamination of the combustion air.

Spontaneous combustion could occur in .

When fighting an electrical fire, you should first _____.

Steering gears can be arranged with hydraulic control equipment known as a _____, or with electrical control equipment.

When the ship in the condition of stand-by and engine trials, usually put the engine telegraph in the ____ position.

_____ neutralizes the acid conditions and_____ cleanses the rings and grooves.

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

After "F.W.E." is given, the air system is shut down, the _____ gear put in, all drains and indicator cocks opened, and the cooling water kept running.

The quantity of oil injected into the cylinder can be regulated _____.

Diesel engines are started by supplying _____ into the cylinders in the appropriate sequence for the required direction.

The air distributor is conventionally driven by and distributes into each cylinder by certain sequence.

When the order given by bridge may have bad results, the duty engineer should .

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

A centrifugal pump may fail to deliver water when first started if the _____.

Generally speaking, suction heads require to be _____ for high speed or large capacities than for low speed or small capacities.

Out of the many hazards that can occur on ships, fire is by far the most frequent, and_____ more total losses than any other casualty.

A _____, sometimes called filters, is a device designed to prevent the passage of unwanted solids into the system.

Worn diesel engine intake valve guides can result in ___________.

The lower end of each piston rod is reduced in diameter to fit a bore in the _____, this being secured to the piston rod by a nut.

Bridge gauge can be used to measure _____ of a diesel engine.