海船船员适任证书三管轮模拟试题3(轮机英语)

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

When the ship, its main propulsion device equipped with clutch, arrived at the port and finished with the engine, the correct operation should be .

In using reduction gears to obtain efficient propeller speeds, _____.

The feed water to the boiler will comprise _____.

Why is it important for fuel oil tanks not to be topped off at the inner bottom level when loading on a cold day?

Which of the following terms would best describe the temperature at which a liquid boils at a given pressure? .

Which one of the following is not generally recognized as one constitute of bilge water? .

When the desired rudder angle is attained by a typical double mm electro-hydraulic steering gear, the _____.

If some surveys refer to statutory survey and ship classification survey but occur temporarily, we call them ____.

If a centrifugal pump vibrates and is noisy when operating, the cause could be _____.

The opening of an exhaust valve on a modem, large, low-speed, main propulsion diesel engine may be actuated by _____.

A magnetic strainer is used in the diesel engine reduction gear oil system to remove small particles of_____.

In the sentence “In some designs the cylinder oil is timed so that the oil injects only on the piston ring belt.”, the "piston ring belt" means _____.

In a four stroke engine, which process lasts the longest period?

For a generator engine, after passing through the turbine the exhaust gas may be conducted out into the _____.

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

After the ship is out of the harbour and in “Full Speed”, well change _____.

Emergency generator is installed on board mainly to ____.

On a diesel engine equipped with an isochronous governor, if the “speed droop” control is reduced to the “zero” setting, the engine _____.

In a two-stroke engine, there are always a series of openings known as , and in some circumstances, there are also openings known as , in the part of the cylinder liner.

A centrifugal pump vibrates excessively during operationUpon disassembling the pump it is found that the impeller is out of balanceWithout an available spare, you should _____.

_____ the oxygen content in the exhaust gas, _____ the combustion is.

Temperature control valves installed in the jacket cooling water system of a diesel engine modulates the rate of water flow through the _____.

If the capacity of the refrigeration compressor is too large, the saturation temperature will _____.

How can the chance of contaminating hydraulic fluid be decreased when working on hydraulic system?

When the ships is going to enter into the harbor, _____.

In an elector-hydraulic steering system, rudder shock is limited by .

The water in an operating auxiliary boiler should be tested for alkalinity and chloride content each_____.

Sluggish response or action of the hydraulic actuators may be a result of _____.

In large, low-speed, main propulsion diesel engine, position ring groove wear usually occurs at the_________________.

High-speed rotating in a centrifugal purifier can produce a force _____ larger than the force of gravity.

In general, domestic flesh water tank kept under pressure by an external supply of _____.

R-12 is generally considered to be a safe, nontoxic, nonflammable, and non-explosive refrigerantIt can, however, become highly toxic when _____.

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.

Your ship’s certificates show that you did not do renewing work for certificateAll certificates have expired a few days beforeThus, your ship is It follows therefore that she will .

A diesel engine will lose power if fuel injection occurs too early because the _________.

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

In a diesel engine, an extremely leaking exhaust valve can cause _____.

Which kind of the following controllers is the most sophisticated controller? .

The most crucial time for any bearing with regards to lubrication is ______.

“The use of a poor quality oil can lead to rapid deterioration of its properties with the resultant formation of deposits in the piston crown which in turn results in a considerable reduction in heat transfer with subsequent overheating and thermal cracking.” According to this sentence, we can know that the principle reason of the overheating and thermal cracking is .

Corrosion and grooving on the blade of an exhaust driven turbocharger is caused by certain components of residual fuel oilsThese components are vanadium, sodium, and＿.

In _____ the control action is independent on(of) the output.

Which of the processes listed would be the most satisfactory method to use to lower the humidity of the air being circulated by an air conditioning system?

The heat used to change a liquid to a vapor is called _____.

Cracks in cylinder and cylinder covers may _____ from unequal heating.

When a refrigeration compressor is in the ‘off’ cycle, the thermal expansion valve will .

If a crankcase explosion occurs in a diesel engine, which of the listed actions should be taken?

The abbreviation "GM" is used to represent the _____.

In an auxiliary boiler steam and water system, the highest pressure will be in the _____.

The voltage developed by an AC generator is controlled by varying the _____.

What is the function of the thrust bearing?

A SECONDARY function of a waste heat boiler is to _____.

As for a hydraulic single action vane pump, the inner wall of the stator is usually of _____ shape.

Any friction fit, tightness or adhesion of the part of any load being lifted should be broken by wedge or tapping and not by increasing the load on the applianceAccording to this sentence, .

An internal bypass is provided on some hydraulic system suction strainers to help reduce the possibility of _____.

A circuit breaker differs from a fuse in that a circuit breaker _____.

Cargo handling unit is rated according to the _____ to be lifted.

Sludge formation in a diesel engine lube oil system is caused by________.

The crank pin journal is provided with large bores for _____.

_____ allows the engine to be placed wherever is most suitable, as they no longer have to be aligned with reduction gearing and shafting as is the case with conventional installations.

Which is not the maintenance work for shaft bearings in transmission system?

In a normally operating diesel engine, the main cause of lubricating oil contamination in the crankcase is a result of the _____.

Proper atomization of fuel in diesel engine combustion chambers will _____.

Once all cylinders are firing regularly, _____ is shut off.

The additional mark _______ in the Classification Certificate for Machinery means propulsion apparatus is remotely controlled on the navigating bridge control station, and engine assembly control station is unmanned periodically.

When an air started, four-stroke/cycle diesel engine is being cranked, the starting air is admitted to each cylinder during what would normally be the .

When the air charge contacts with the cylinders and pistons and mixes with the residual gases, it will .

A fuel injection valve opening at pressure lower than normal will result in _________.

When operating with a negative suction head, which of the following types of pumps will require priming?

Which of the following faults would allow lube oil to enter the cooling system of a diesel engine?

The intake valves in a diesel engine are reseated by _____.

The amount of fluid delivered by a positive displacement pump can be regulated by _____.

Air in the fuel lines to the fuel injection nozzles of a diesel engine will cause the engine to ______.

An independent bilge suction is required for _____.

If a hydraulic pump is overheating, the cause may be __.

Personnel who are moving or handling material aboard ship should NOT follow which of the listed practices?

The piston rings are manufactured with a diameter _____ the bore of the cylinder.

If the compressor-discharge temperature is higher than the receiver temperature .

____, where extensive work, particularly to the ship’s structure may be repairedThese are the result of groundings collisions and other accidents.

Indications of ______ are loss in power and irregular running of the engine, high exhaust temperatures of corresponding unite, high local temperature in scavenge trunk, surging of turbocharger, and sparks and smoke emitted from scavenge drains.

If a diesel engine turned over at normal cranking speed but failed to start, the cause could be late fuel injection or _________.

A circuit that has one wire in contact with the hull of the ship is a .

To ____ , the power is supplied by main switchboard directly not though sub-board.

When current and voltage reach maximum values at the same time, the power factor is .

The expansion valve on a Freon system controls the _____.

Which of the following statements concerning cylinder liner wear is true?

Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?

In the design of hydraulic piping and equipment consideration is given to minimize turbulence in the hydraulic fluid, as this will cause _____.

Diesel engine main and connecting rod precision bearings are made in halvesEach half exceeds one-half the bearing circumference by a small amountThe small amount is termed _____.

In the starting system, the automatic valve is controlled by , and the cylinder start valves are controlled by .

The latest annex of MARPOL 73/78 is about .

Why a gearbox is needed in a ship driven by a medium-speed diesel engine? .

Water can’t be used to put out fires of _____.

Which of the listed methods of heat transfer takes place when two substances of different temperatures are in physical contact with each other?

The engine will fail to start unless _____.

Which of the following is NOT the advantages of the remote control and automation of engine operations? .

In a diesel engine lube oil system, which of the following parts should be lubricated first?

A gear pump belongs to _____ according to its working principle.

Centrifugal pumps, however, can be designed with a number of impellers _____ to attain a large amount of liquid.

In the construction of a diesel engine, what is the purpose of end plates?

Smaller engines can be made more rigid than large ones and may not have _____.

Why the cooling water of the diesel engine should be treated? Because the ____.

Which of the following statements describes the function of an expansion tank in a diesel engine cooling system?

What causes diesel fuel to be ignited in the cylinder of an operating diesel engine?

Compared to four-stroke/cycle engines, two-stroke/cycle diesel engines have the disadvantage of ________.

One method of determining crankshaft misalignment is by________.

When the vessels steering wheel on the navigation bridge is turned, the difference existing between the position of the wheel and that of the rudder is known as _____.

The solid waste was charged into the incinerator through ____.

A(An)______ should be issued for every company complying with the requirement of the ISM Code by the Administration.

Who is responsible for ensuring that someone is assigned to close the watertight doors in an emergency? .

Because the top of the connecting rod swings about the pin and changes direction each time the piston reaches mid-stroke, the relative speed between bearing and pin at mid-stroke is zero, ______ to a maximum as the piston approaches top or bottom dead center and then ______ back to zero again as the piston approaches mid-stroke and the connecting rod changes direction.

A pressure drop in the liquid line of a refrigeration system may cause________.

The pistons are cooled by oil supplied from the forced _____ system.

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

A two-stroke diesel engine exhaust temperature will be lower than a four-stroke diesel engine of the same displacement because the _____(1) MEP is lower and the scavenging air is cooling the exhaust gases; (2) valve overlap in a four-stroke.

The safety valves should be tested and adjusted when the boiler survey is _____.

A tank has been sealed and unventilated for a long period of timeWhich of the following conditions does this indicate?

The officer in charge of the engineering watch shall ensure that all machinery involved with the maneuvering of the ship can immediately be placed in the _____ of operation when notified that the ship is in congested waters.

Late fuel oil injection in a diesel engine can result in ___.

The plunger may be rotated in the barrel by a rack and _____ on a sleeve which is keyed to the plunger.

_____ control system is one in which the control action is independent of the output.

The motor for the fresh water pump ______.

If an incorrect entry were made in the Oil Record Book, you should _____.

The value of the controlled variable, which under any fixed set of conditions the automatic controller operates to maintain, is known as __________.

The ratio of output response to a specified change in the input is known as_________.

Which of the diesel engine cylinder liners listed has internal cooling water passages?

Fuel is delivered into the combustion space by _____.

Fuel oil is thought to be one of the main factors _____ the operation and maintenance of an engine.

When anaerobic bacteria convert the sewage to an inert sludge, .

Before starting the turning gear, _____ should be worked by hand to minimize corrosive action on the liners.

The FIRST course of action in fighting a fire in a cargo or fuel oil tank is to _____.

Which of the following problems may occur if the opening pressure of a fuel injection nozzle is greater than specified by the engine manufacturer?

Which of the following is false?

The plunger in the fuel injector pump, usually operated by a _____, is driven up and down when working.

The _____belongs to the anchor handling equipment.

Which of the following statements is correct regarding a turbocharged four-stroke/cycle diesel generator? .

Lube oil in the fresh water cooling system of a diesel engine may result from a _______.

The major cause of problems occurring with fuel injection equipment is_______.

You increased the _____ to 150 tons that’s why the fuel oil _____.

To successfully reduce an excessively high diesel engine exhaust gas temperature, you should _____.

According to the functional requirements for a Safety Management System, every company should develop, ______ and ______ a SMS.

In modern installations, the main engine and the standby auxiliary engines .

The viscosity regulator controls the fuel oil temperature ______provide oil at the correct viscosity for combustion.

Which of the following procedures should be carried out to permit the use of a crosshead engine with an inoperable after-cooler?

In order to keep excess oil from the intake ports in two-stroke/cycle diesel engines, ________.

_____ the compression ratio, _____ the proportion of the heat energy of the combustion turned into useful work at the crankshaft, other things being equal.

In some diesel engine designs, the injection of cylinder oil is timed to impinge when the piston and only impinge on .

When fuel enters the crankcase of a diesel engine, it ________.

In a compression refrigeration plant the refrigerant is under low pressure in the _____ and under high pressure in the _____.

The flywheel reduces speed fluctuations by ________.

An operating turbocharged diesel engine that suddenly loses power, is due to a/an_________.

Expansion tank should be used to remove _____ from cooling water.

If a main propulsion diesel engine hunts excessively at idle speed, you should ______.

When stand-by before sailing, the duty engineer and officer should check clock, engine telegraph and rudder, and then write it in the ____.

Hydraulic machinery failures are commonly caused by misalignment of the system components and by _____.

Medium speed engines have a _____ power to weight ratio than the slow speed two strokes, but due to the higher speeds tend to have _____ maintenance intervals.

Which of the following statements is correct concerning the viscosity of lubricating oil?

Oil pressure in the lubrication system is _____ the static sea water head to ensure that sea water _____ the stem-tube.

The inner part of the condenser should be cleaned with _____.