海船船员考试轮机部三管轮模拟题4(轮机英语)

Start the turning gear, and with some one hand-operating the cylinder lubricators at regular intervals, and with the indicator cocks ______, and with the control gear in the ______ position, give the engine at least one complete turn.

According to Annex IV of comminuted and disinfected sewage using an approved system can be discharged when the ship is more than away from the nearest land.

Provision must be made in pipe systems for changes in length due to change of temperatureThe bold and italic word “provision” probably means _____.

A six-cylinder, two-stroke/cycle diesel engine is fitted with a rotary distributing air starting systemThe speed of the rotating distributor disc is ________.

The booster pump, which supplies diesel oil to , should have a possibility of being powered by compressed air or by emergency power.

If the compression ratio is increased on any diesel engine, ________.

Which of the following statements concerning butterfly valves is correct?

After fuel tanks have been topped off, which of the listed procedures should be followed next?

Because the castings of smaller engines are not so big and heavy, _____ and cylinder block may be made in one piece.

In a centrifugal Freon refrigeration system, the overall capacity of the system is increased by .

The _____ is a crystal which, under pressure, produces an electric current which varies with the pressure.

A centrifuge of which the bowl is arranged as the upper and lower parts separate discharges the sludge .

In a naturally aspirated diesel engine, the volume of air intake is directly related to engine _____.

The separating effect of oil separator is not very good, the reason may be ___ .

Which of the following pumps will build up a bursting pressure or stall their motors if the discharge valves are closed? (1) gear; (2) centrifugal; (3) screw.

The trend nowadays is to build the frame. box as a separate fabricated construction and then, after stress relieving and machining the mating surfaces, to mount it on the ______This has the advantage of saving weight.

The bulb for the thermal expansion valve is located______.

The boiler feed water check valves are located on the _____.

Which is an acceptable means of correcting high mica between commutator bars?

When received the order "finished with engine" which of the following operations is wrong?

Heat energy is a source of power, but _____ will cause damage to the engine.

The type of gauge most commonly used to measure pressure is the _____.

During an engine room watch if immediate action is necessary to ensure safety of the ship its machinery and crew _____.

Which of the following statements describes the relationship between flash point and ignition temperature?

Operating a rotary pump at speeds in excess of design requirements could cause _____.

When a ship is entering to narrow waterway and the fuel feeding of the main engine is keeping unchanged, which of the following is the wrong conclusion?

In practice, the refrigerant flow after the evaporator is designed to ensure that the vapor leaving the evaporator is slightly _____.

Air bubbles in a hydraulic governor can cause ______.

When starting air-conditioner in the winter, we should open____ in sequenceIvalve of warming IIvalve of humidifier IIIFan

Class B fires are best extinguished by smothering, i.e_____.

_____ is a source of power by which the diesel engine may operate.

The _____ pump discharges a nearly constant amount of liquid regardless of pressure.

The cylinder and piston must be warmed up _____ to a temperature of about 140 degF in standing by engine.

_____ is the removal of exhaust gases by blowing in fresh air.

Under normal conditions, the main source of crankcase oil contamination is attributed to ______________.

Clean oil is achieved in a clarifier bowl where the impurities and water collect at the bowl _____.

The spur geared mooring winches have advantages over worm geared ones in .

After changing out the fuel filters the diesel engine fails to restart, the most probable cause for this condition is a/an __________.

_____ in the engine room, the motormen could hardly talk each other.

The external circumference of a pair of main bearing shells is slightly _____ that of the bore of the housing which receives themWhat’s the meaning of “that” in the sentence above?

The function of a centrifugal pump double volute casing is to _____.

If your vessel has a starboard list after taking on fuel, you would transfer fuel _____.

It is important that the water _____ very often as this can lead to increased deposits.

Which of the following statements is true concerning all three-phase alternators?

Diesel engine air start valve timing is controlled by________.

To absorb the wear resulting from impeller rotation and abrasives in the liquid, a centrifugal pump is usually fitted with _____.

A diesel engine should not be operated at low loads for long periods of time because_____

Noise in a refrigeration compressor can be caused by _____.

The crankcase can not be opened ______ the parts have been cooled down.

The ____ in the steering gear system provides the force.

Before pumping up the crankcase oil, _____ should be worked by hand to minimize corrosive action on the liners.

When the ship is going to enter into the harbor, .

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

Excessive oil foaming in the crankcase of a refrigeration compressor at start up can cause _____.

An over-speed trip serves to ________.

Excessive piston ring wear in a diesel engine will cause ____________.

The certificate for the refrigerating plant will _____soonI’d like to extend its validation now.

Generating tubes in waste heat boilers are finned to _____.

Which lubricating oil additive is used in diesel engines to reduce the tendency for sludge and varnish to form. on the engine parts?

Which of the following pumps are self-priming, and can deal with liquid from a level below the pump: (1)reciprocating; (2)vane; (3) gear.

Which of the following will be desirable properties of refrigerant? (1) non-explosive; (2) non-corrosive; (3) that it doesn’t react with lubricants

Increasing the compression ratio of a diesel engine while maintaining the designed rate of fuel flow will result in _________.

Burner ignition failure in an automatically fired auxiliary boiler would be caused by .

The trouble-free life of an engine indicates _____.

The International Sewage Pollution Prevention Certificate shall be issued for a period specified by the Administration, which shall not exceed from the date of issue.

Waterside scale in a fire-tube boiler may cause _____.

The SOLAS Convention is the main international convention .

Generally the gudgeon pin is fully floating in both connecting rod small end and _____.

Fires occurring in combustible metals, such as sodium or magnesium, are classified as a _____.

The pressurized air is usually cooled to increase the charge air _____.

To ensure the safe operation of each ship and to provide a link between the Company and those on board, every Company, as appropriate, should designate a person or persons ashore having direct _____ to the highest level of management.

A diesel engine fails to start because of water in the fuelIn order to start the engine, you should ______?

The purpose of the safety relief valves installed on an auxiliary boiler is to _____.

If the head pressure is too high, .

Large crosshead type engine generally has two lubrication systems, a function performed only by cylinder oil system is .

In a diesel engine, a cylinder liner should be replaced if it is ___________ⅠScuffed ⅡScored

The sub-multiple prefix “micro” means _____.

If you must make an electricity connection in a poorly accessible spot, solder it and seal it against ____.

As a general rule, the first troubleshooting action to be taken in checking faulty electric control devices is to _____.

Condensate formed within the first-effect tube nest of a double-effect, low pressure evaporator, is removed by a _____.

Fire prevention during welding or burning aboard any vessel should include _____.

Which of the listed extinguishing agents is NOT suitable for fighting a liquid paint fire?

You should frequently compare drum-mounted and remote-reading water level indicators_____ between these have contributed to failures because of overheating through shortage of water, when a boiler was being oil-fired.

The purpose of compressing the air within the cylinder of a diesel engine is to ________.

For an ordinary four-stroke diesel engine the exhaust valves close _____.

The exhaust ports of a diesel engine using the cross-flow scavenging method are opened and closed by the _________.

The difference between measured and desired values is called _____.

If two fuel service tanks are installed, the empty tank should be pumped up directly it is emptyWhat is the meaning of “directly” in the sentence above?

Which of the listed pre-start procedures should be carried out prior to starting a crosshead type diesel engine after an overhaul?

Ring groove inserts are occasionally used on aluminum alloy piston to_______.

Starting a large low-speed propulsion diesel engine on diesel fuel during cold weather conditions, will be made easier by _______

Constant superheat is maintained at the evaporator outlet of a refrigeration coil by a .

The piston moving up and down keeps the crankshaft _____.

The starting air bottle should be pumped up to maximum pressure by the _____ before start of the engine.

Fuel is not supplied to the corresponding cylinder due to a failure of _____.

The heat required to change a substance from a solid to a liquid while at its freezing temperature, is known as the latent heat of _____.

When air is at its dew point it is at its______.

is the main reason that reduces the power advantage of a two-stroke engine over a same size four-stroke one to about .

A burning AC motor would be considered what class of fire?

The power generated in the turbine must _____ that required by the compressor.

The exhaust gases in a supercharged two-stroke/cycle diesel engine are expelled from the cylinder by _____.

Special thrust devices are provided on ships to improve their _____ at zero ship speed when the rudder is relatively ineffective.

A positive displacement pump is that where the volume of the pump chamber is alternately _____ to draw the liquid in and then _____ to force the liquid out.

The ability of the governor to prevent fluctuations in engine speed is termed _____.

During the PSC inspection under the provision of SOLAS 74, which one may be regarded as clear grounds for ships’ detainment?

These piston rings are so badly worn that they must be _____.

Gas exchange, which is a basic part of the cycle of an internal combustion engine, is .

The sum of the sensible heat and the latent heat of any substance is known as _____.

To extinguish an electrical fire, you should use _____.

The compressed air is admitted to each cylinder through a cam operated by starting air valve when the piston has just passed its _____.

To check the setting of the overspeed trip on a diesel powered generator, you would use a _____.

When lighting off an auxiliary boiler, which of the problems listed could cause the burners to sputter? .

(Piston area)X(Piston stroke)K(numbers of the cylinders)=engine_______.

On tank vessels equipped with power operated cargo tank valves, the type of power operator most commonly used is _____.

Under tropical conditions, control valves have fully opened, but the room still hotWhat measures can be taken in such a case?

The energy consumed by an AC motor, as strictly reactive power, is _____.

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

In general, _____ is suitable for delivering small quantities at high pressure.

Water lubricated tailshaft bearings wear, ____.

The value of GM still remains one meter, meanwhile we can pump the ballast water to_____ the ship on even keel.

If you don’t understand the meaning of the technical terms of the diesel engine, you can _____ the dictionary of machine technology.

The main propulsion diesel engine jacket water temperature rises above normal, with the raw water sea suction and the expansion tank water level being normalWhich of the following problems is most likely the cause?

Properties of a good refrigeration oil include_____.

The correct pH value of boiler water is achieved by continuous addition of a suitable _____ to the feed.

The position of _____ on the crosshead on a large diesel engine is determined by dowel pins.

Overflow valve is used to ____.

According to the Robinson Graph, suddenly astern maneuvering of main engine during navigating will cause____.

A ship designed for carrying goods requiring refrigeration is called ______.

_____ is arranged for cleaning the lubricating oil in the system and clean oil can be provided from a storage tank.

After the order “_____” is given, the air system is shut down, the turning gear put in, all drains and indicator cocks opened, and the cooling water and lubricating oil systems kept running.

Main engine room control console alarms are to be of the self monitoring type, meaning that an open circuit to a particular alarm circuit will _____.

Which of the following should be the FIRST step in removing a generator from parallel operation?

Some large A.Cmotors are equipped with heatersThese could be _____(1) resistance heaters bolted directly to the frame. ;(2) low voltage windings embedded in the motor windings

Cracks in the cylinders and cylinder covers may result from _____.

The shape of a cam on a diesel engine determines the valve’s _____.

Excessive alkalinity of the water in an auxiliary boiler can cause _____.

By which of the following means is force efficiently provided to vary the pitch of the blades on a modem controllable pitch propeller?

Fusible plugs are installed in fire-tube boilers to _____.

A refrigeration system contaminated with moisture can be affected by _____.

Cast irons weakness in tension and under shock loading limits its use to low pressure steam, air, oil and low speed water fittingsThe above sentence, most probably means _____.

A diesel engine burns _____ a gasoline engine of the same capacity in the same period of time.

Which of the listed governor characteristics will greatly affect the load sharing relationship between paralleled diesel generators?

With _____, the corrosion problems are much reduced in a central cooling system.

Valve gear knocks are more easily located while the engine _____.

The Ship Security Plan should indicate the operational and physical ____ the ship itself should take to ensure it always operates at security level 1.

The diesel engine exhaust gas bypass, as fitted with some waste heat boilers, is installed to _________.

Which of the following problems is the main source of fuel pump and injection system malfunctions?

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

_____ may have two emergency source of power, thus requiring two emergency switchboards.

The fuel pipes and ducts should be blown with _____.

Preventive maintenance ______.

If there are micro-seized areas on the liner or skirt scratch-over manually with a coarse carbo-rundum stone (grindstone), moving the grindstone ____ at an angle of 20 to 30 degrees to horizontal.

If the main engine of an unattended engine room shuts down automatically, it will be indicated by an alarm _____.

In the presence of an open flame or hot surfaces, chlorinated fluorocarbon refrigerants decomposes and from _______

It is easier to replace a dry cylinder liner than a wet one because______.

In a flash distilling unit, evaporator feed (seawater) first absorbs heat in the _____.

If you were operating a centrifugal water service pump with worn wearing rings, the _____.

_____ will be used to blow away soot and the combustion products from the tube surfaces.

Each completed page of the Oil Record Book must be signed by the _____.

Starting air valves are held firmly on their seats by_______.