海船船员考试轮机部三管轮模拟题6(轮机英语)

Before being used the fuel service tank should be drained of _____.

Strainers are commonly used in hydraulic systems to _____.

The scavenging air ports are located at _____ that they are just exposed by the upper edge of the piston when the piston is in the bottom dead center position.

If emergency welding repairs must be made to the upper area of a fuel tank, the tank and/or adjacent compartments may need to be _____.

Setting a sealing equipment astern on the tailshaft can’t ____.

Excessive valve lash in an auxiliary diesel engine will cause the valves to open________.

The latent heat of evaporation is dissipated in the _____ in a compression refrigeration system.

The most critical part of the bunkering operations, which can result in an oil spill, is when the _____.

A butterfly valve consists basically of a disc pivoted across the bore of a ring body having the same radial dimensions as the pipe in which it is fittedAccording to the above sentence, which of the following statements is not true?

Worn out ring grooves should be _____ to standard dimension after being welded.

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.

Wires should have each feature of the following except ____.

For auxiliary engines the permissible overload is ____ for one hour every twelve hours.

When good and steady service conditions have been achieved, the running surfaces of the piston rings and cylinder liner will be_____In addition, the rings will move freely in the grooves and also be well oiled intact, and not unduly worn.

Which of the following may lead to the engine NOT to start on air?

The diameters of the crankpins should be measured using _____.

Which of the following best describes the thermodynamic effect on the pressure and volume relationship with regards to saturated gases?

If the turbocharger failed on an auxiliary diesel engine, which of the following conditions would probably occur?

We have planned to remove the piston with the help of assistant engineers during the cargo unloading, while the vessel ______ port Shanghai.

Fire dampers prevent the fire spreading through the process of _____.

When entering a foam injected space _____ breathing apparatus.

The hot expanding gas rotates the blades of the exhaust turbine, thus _____ a large of its power, _____ drives the compressor.

The movement of heat within a fluid, caused by the application of thermal energy, is called _____.

Topping wires fix the height of the derricks and _____ to the deck may be used to prevent fore and aft movement.

Lubricating oil is supplied to the crank-pin bearings in a marine diesel engine by _____.

Which of the listed operating conditions would have the greatest effect on the volumetric efficiency of an operating reciprocating air compressor?

Upon the completion of required tests, a _____ should be placed on each extinguisher, showing the date and the person who completed the tests.

The purpose of PSC is ____.

The figure that the volume of air at BD.Cis divided by the volume of air at TDC is termed as_____.

Which of the listed chemicals can be routinely used to maintain the hygienic quality of potable water?

Which of the following may cause that the compressor cuts off on high pressure cutout in a refrigeration plant? (1) faulty condensing; (2) too few refrigerant; (3) high discharge pressure.

The knock occurring when a cold diesel engine is started and continues while running at low speed, but stops when the engine reaches normal operating speed and temperature, is______.

The main bearing shells often have a thin _____ of lead or indium to provide a layer giving protection against corrosion.

Excessive oil foaming in the crankcase of a refrigeration compressor is most likely to occur when the compressor

The use of sinking and dispersing agents for the removal of surface oil is _____.

Which of the devices listed, when used on an electro-hydraulic steering gear, keeps the movement of the redder closely in step with the steering wheel?

After a normal, or safety shutdown, automatic combustion control systems for an auxiliary boiler are designed to prevent the immediate re-firing of a burner in order for the _____.

To prevent excessive _____ in the transverse girders, the tie bolts are positioned as close to the center of the crankshaft as possible.

The furnace of an oil fired boiler should be _____ before the operating burner is lit.

The sections of an Oil Record Book proceeding the log pages contain a _____.

Annex IV of MARPOL 73/78 contains regulations for the prevention of _____.

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

The fire of fuel oil is classified as____ fire.

The two-stroke cycle begins with the piston coming up from the BDC, with the scavenging ports in the sides of the cylinders being _____.

In a diesel engine, when installing new piston rings it is important to check_______Iring gap clearance IIside clearance

The key feature of the Sulzer RT-flex system is that it gives complete freedom in the and operation of fuel injection and exhaust valve actuation.

Which of the listed types of files is the best for producing a fine finish on metal?

Persistent knocking in one cylinder of a diesel engine could be caused by_____.

_______ diesel engines generally have two systems of lubrication: a total loss system feeding and a circulating system lubricating the running gear and cooling the pistons.

If you notice smoke coming fro the crankcase exhaust fan outlet of an operating diesel engine, you would suspect______.

The steam boiler is part of a closed loop steam, whereby, after the energy of the steam is used up and it becomes water again, _____ is collected and returned back to the boiler for heating up again to steam.

What is a function of the wearing rings used in most centrifugal pumps?

A heater in the circuit facilitates warning of the engine prior to ____ by circulating hot water.

Some of the energy fed into the pump will be dissipated as _____ due to mechanical inefficiencies, the remainder will be converted into pressure rise and fluid velocity.

When ship navigating in rough sea, the first measure taken by the chief engineer to prevent the overload should be .

Modern engines _____ exhaust gas driven turbo-chargers to supply pressurized fresh air for scavenging and supercharging .

If the plunger or barrel of a fuel injection jerk pump becomes damaged, __________.

A motor enclosure which protects against falling liquids is classified as _____.

Generally the function of lubrication is to form. of a film of lubricant between any two surfaces that have relative _____, so that surfaces dont get touch with each other.

While troubleshooting a refrigeration system for low head pressure, liquid refrigerant flooding back from the evaporator is determined to be the causeIt may be necessary to _____.

Before replacing a piston you should check the rings to see that all clearances and gaps are within the permissible _____.

Differential pressures can be measured with the use of a _____.

During tours of inspection in the machinery space, you found a fire on a running generator, what should you do first?

_____, the motion would continue indefinitely once it had started.

The condensers located in various stages of a flash evaporator are cooled by___.

According to SOLAS, 1974, as amended, the shipowner or any person who has assumed responsibility for the ship (the “Company”) must .

A disadvantage of a four-stroke/cycle diesel engine is ________.

Which of the following can be directly obtained by means of an indicator card?

He said that he had turned the main engine one complete revolution with the _____.

The water level in the gauge glass when a boiler is operating is _____ when the boiler is shut down.

Bilges may be pumped _____.

Before you begin administering artificial respiration, you should be sure the victim .

The refrigerant flows through the evaporator, where it ____ heat from the refrigerated space.

STCW78/95 Convention describes that _____ are laid down for the certification of engineer officers in charge of a watch in a traditionally manned engine room, or the designated engineer in a periodically unmanned engine room.

If an auxiliary diesel engine temperature is higher than normal ,but the thermostat is determined not to be defective you would suspect a /an ___________.

The pipe friction and the resistance will _____ as a result of an increase in the amount of fluid flowing through the system.

All engineer officers and engine room ratings shall be aware of the serious effects of operational or accidental pollution of the marine environment and shall take all possible_____ to prevent such pollution, particularly within the framework of relevant international and port regulations.

The purpose of the low pressure cut-out switch is to _____.

The piston cooling system may employ similar components, except that _____ is used instead of a head tank.

One of the main functions of wearing rings, as used in a centrifugal pump, is to _____.

The most practical way of detecting an overload in one cylinder of an operating large, low-speed ,main propulsion diesel engine is to ______.

_____ for the camshaft gear train is taken from a spur gear which for a six cylinder engine is at the coupling end.

A _____ in the air delivery line near to each compressor is essential.

Pitted reduction gear teeth having a deep blue color with evidence of overheating have been operated with _______.

An aluminum piston has lower inertia and higher coefficient of _____ compared to that of cast iron.

"Scavenging" on a diesel engine means _____.

If fuel injection to a four-stroke/cycle diesel engine begins earlier than designed, ignition may be delayed because the _____.

Which of the processes listed consumes the greatest amount of power while producing the greatest amount of heat? .

Before shutting off the fuel supply to stop a medium or high–speed diesel engine, why is it necessary to allow the engine to idle for a few minutes?

To prevent accidents from occurring, special valve chests are used in such cases in which interchangeable blanks and connecting passages are incorporatedThe bold and italic word “which” means _____.

The purpose of the wearing rings used in a centrifugal pump is to _____.

_____ rods are not in proper condition so that too much fuel is supplied to the corresponding cylinder.

Vents are led from the engine to the head tank for the release of ____ from the cooling water.

In order to improve the efficiency of the communication with shore personnel, you should .

Fuel has been injected but ignition failsThe possible cause may be _____.

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

The fire of burning paper is classified as____ fire.

A vacuum is initially created in a flash type distilling plant by _____.

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.

____ the cylinder walls, the heat passes through them by conduction.

In the event of the cylinder starting valve leakage _____ would pass into the air pipes and ignite the oil deposited.

With reference to operating a four-ram steering gear system under emergency conditions, which one of the following statements is incorrect?

Low compression in a diesel engine could be caused by________________.

When normal operating pressure is applied to the hydraulic oil used in a high-pressure system, the oil _____.

Mechanical energy in transition is referred to as _____.

The external circumference of a pair of main bearing shells is slightly larger than that of the bore of the housing which receives themThe difference is termed _____.

To increase the frequency of an operating AC generator, you should _____.

Both the temperature and the pressure of the refrigerant are increased in the _____.

In sewage treatment, the term maceration refers to the process of ______.

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

The higher the cetane number, _____ the ignition quality of the fuel.

An International Oil Pollution Prevention Certificate (IOPP) for a "new" vessel ceases to be valid if _____.

One of the disadvantages of using carbon dioxide to extinguish a fire in an enclosed space is _____.

Grease the roller bearings with H.Pgun In the sentence “HP.” means _____.

For an ordinary modem marine four-stroke engine the inlet valves close _____.

If keep the fuel injection of main engine unchanged when ship is fouled, that will cause IThe speed of main engine to be reducedIIShip speed to be reducedIIIThe resistance torque of propeller to be increasedIVTrim at stern to increase.

What is the substance called which can readily be converted from a liquid into a vapor, and also from a vapor into liquid with a reasonably narrow range of pressure?

Convection spreads a fire as a result of _____.

When bilge water is heated in a holding tank, which one of the following statements is not accurate? .

A pyrometer is an instrument commonly used to measure_____________.

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

Cast iron and gunmetal fittings are used freely in small sizes at moderate pressure; large fittings, those for high pressure and temperature are cast or mild steelIn the above sentence, the word “those” means _____.

The thermal expansion valve reacts directly to the _________.

It is obvious that the expansion of the water ______ the increase of its temperature.

The ignition quality of a fuel oil is an important operational consideration because it________.

The crankshaft is of the semi-built type, with the _____ being shrunk into the forged or cast steel crank throws.

The direct acting mechanical governor used with some small diesel engines, controls fuel flow to the engine by______.

The needle valve in a fuel valve will _____ when the fuel pressure action on the needle valve tapered face exerts a force lower than that of the spring compression.

Which of the following problems can cause an above normal air temperature to develop in the intake manifold of a turbocharged and after-cooled diesel engine?

There should be a lubricating oil _____ between the main beatings and the crankshaft.

A distorted furnace in a fire-tube auxiliary boiler may be the result of .

A distorted spray pattern from a fuel injector can cause a diesel engine to have _____.

The boiling and condensation points of refrigerant mainly depend on the _____ exerted upon it.

Diesel engine fuel oil contamination often results in ______.

The volute pump is one in which the impeller _____.

The rising velocity of the globules carries them upwards where they become trapped by the under surfaces of plates and ______ until the enlarged globules have sufficient rising velocity to travel along the plate surface and break away at periphery.

While paralleling two (2) AC generators using synchronizing lamps only, both lamps will go dark when the generators are _____.

In a typical fuel oil system, the oil is stored in tanks in the double bottom from which it is pumped to _____ and heated.

In a four-stroke cycle diesel engine the intake valves open ___________.

Which of the following will be the function of lubricating oil used in marine engines?

Cooling of engines is achieved by _____ a cooling liquid around internal passages within the engine.

If the action of the engine indicates that some of the cylinders are not firing, the ones affected may be determined by watching ______.

Problems with the diesel engine fuel injection pump are usually caused by_____.

A: Please tell me the specifications and quantityB: _____.

The device allowing for the change in volume of the cooling water in a propulsion diesel engine closed cooling system is the _____.

The boiling and condensation points of a refrigerant depend on the _____ exerted upon it.

Restrictions occurring in the small orifices of pneumatic control system components can be used by __________.

The pressure head of a water pump is given in the unit of _____.

A thrust bearing is used with a propulsion diesel engine to _____.

Latent heat changes the _____ of water.

In the voyage, duty officer should inform. ____ situation to the duty engineer immediately.

Charging is the filling of the engine cylinder with a supply of _____ for compression.

If the jacket water temperature in an auxiliary diesel engine cooling system is lower than normal, the probable cause is .

The purpose of designing some waste heat boilers with sinuous fire tubes, is to_______.

A large change in ambient temperature, or using an oil of a viscosity different from the one recommended by the manufacturer in a mechanical hydraulic governor, will result in the need to adjust the _____.

To avoid damaging the components of a printed circuit board when testing it with a DC volt-ohmmeter, you should .

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

Due to excessive water in the fuel, a diesel engine fails to startBefore the engine can be started, the water must be removed from the _________.

Which of the following statements concerning the lubrication of diesel propulsion engines used in vessels over 300 gross tons is most accurate?

_____ are mounted in pairs to protect the boiler against overpressure.