乙类适任证书(轮机英语)模拟试题2

主机以83转/分钟正常航行时，增压器的转速为11700转/分钟，上午10时增压器突然开始产生异常声音，出现振动，主机转速降至60转/分钟, 同时增压器转速降至2400转/分钟。

主机废气涡轮增压器需解体、清洁及检查，喷嘴环、压气机和涡轮机端轴承用船上备件换新，所有其它部件发现不合格也全部换新，装复时记录所有装配间隙。

The exciter must vary with: ① load current② the power factor, ③ speed change of the prime mover.

When the load has a lagging power factor this voltage drop is considerable. This sentence means that _____.

材料：

The field current supply in older machines comes from a lower voltage direct current generator or exciter on the same shaft as the alternator. Modern machines however are either statically excited or of the high-speed brush-less type. The exciter is required to operate to counter the effects of power factor for a given load. The power factor is a measure of the phase difference between voltage and current and is expressed as the cosine of the phase angle. With a purely resistance load the voltage and the current are in phase, giving a power factor of one. The power consumed is therefore the product of voltage and current. Inductive or capacitive loads, combined with resistance loads, produce lagging or leading power factors which have a value less than one. 

The power consumed is therefore the product of current, voltage and power factor. The alternating current generator supplying a load has a voltage drop resulting from the load. When the load has a lagging power factor this voltage drop is considerable. Therefore the exciter, in maintaining the alternator voltage, must vary with load current and also the power factor. The speed change of the prime mover must also be taken into account. 

问题： The word “machines” in the passage refers to _____.

Which of the following statements is true according to the passage ?

PSC inspection is implemented by______ through______.

Before exercising PSC, a port state should______.

Who will be responsible for ensuring that a ship maintains a standard at least equivalent to that specified in international conventions?

材料：

Port State Control (PSC) is the inspection of foreign ships in national ports for the purpose of verifying that the condition of the ship and its equipment comply with the requirements of international conventions and that the ship is manned and operated in compliance with applicable international laws. The primary responsibility for ensuring that a ship maintains a standard at least equivalent to that specified in international conventions rests with the flag State and if all flag States performed their duties satisfactorily there would be no need for port State control. Unfortunately this is not the case as evidenced by the many marine accidents around the world - hence the need for additional control.

The authority for exercising PSC is the national law based on relevant conventions. It is therefore necessary for a port State to be Party to those conventions and to have promulgated the necessary legislation before exercising PSC.In accordance with the provisions of the applicable conventions, Parties may conduct inspections of foreign ships in their ports through Port State Control Officers (PSCOs). 

问题：The purpose of PSC is ______.

① to check and inspect foreign ships 

② to verify the condition of a ship in compliance with requirements of international conventions; 

③ to make sure that the ship is manned and operated well; 

④to detain ships

Each ship shall carry on board a ship security plan approved by_____.

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

Waste oil from the lube oil sumps of machinery may NOT be ______.

The Company should ensure that the master is fully ______with the Company's SMS.

The term "moderate speed" was previously interpreted（解释） as meaning a speed which would enable a vessel ______within half the range of visibility.

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（拥挤的） waters.

The fire drill must, as far as practicable, be conducted as if ______.

STCW shall apply to seafarers ______on board seagoing ships entitled to fly the flag of a Party.

The engineer ______ the watch to the relieving officer if there is reason to believe that the latter is obviously not capable of carrying out the watch-keeping duties effectively.

The International Oil Pollution Prevention Certificate required by MARPOL is issued to Chinese flag by the _______.

Enhanced procedures concerning the exercise of ______have been developed to allow intervention（干涉） in the case of deficiencies deemed to pose a danger to persons, property or the environment.

Which of the following is NOT on the list items to be recorded in Oil Record Book Part I (machinery space operation)?

The additional mark ______in the Classification Certificate for Machinery represents that personnel are watching at engine assembly control station and monitoring all machinery and electronic devices.

The depth of the ship below the waterline measured vertically to the lowest part of the hull is called_____.

The tool used in precision(精确) work to smooth or enlarge a slightly undersized(不够大的) hole, is called a ______.

Preventive maintenance______.

The necessity for administering artificial(人工的) respiration may be recognized by the victim's ______.

The flash point of a petroleum product is an indication of its ______.

Before replacing a piston you should check that all rings are ___.

At the earliest indication of fire aboard your vessel, you must FIRST ______.

CO2 extinguishes a fire by __________.

Fires resulting from spontaneous(自发的) combustion are usually caused by the improper disposal of______.

A tank has been sealed and unventilated(不通风的) for a long period of time. Which of the following conditions does this indicate?

A fire in a pile of canvas would be classified as a ______.

“Movement of engine no longer required.” means “______”.

Prior to starting most medium-speed propulsion diesel engines, which of the procedures listed should be observed?

Restrictions occurring in the small orifices(孔) of pneumatic control system components can be caused by ______.

Before putting on the starting air, the reversing and control gear should be _____.

With UMS, when the engine room is unwatched, ______will control the main engine.

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

Bourdon Tube is probably the most commonly used______ measuring instrument.

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

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

A generator is prevented from becoming motorized by the use of a/an ______.

The field coils ______ and the armature(电枢) ______. This is in fact the arrangement adopted for large, heavy duty alternators.

While paralleling two AC generators using synchronizing lamps only, both lamps will go dark when the generators are______.

Which of the following problems may be encountered by using an oil having a viscosity higher than that specified for an operating hydraulic system?

The output voltage of a 440 volt, 60 hertz, AC generator is controlled by the ______.

Which of the following can be used in hydraulic transmission system?

Hydraulic machinery failures are commonly caused by contamination of the hydraulic fluid and ______.

As the designated rudder angle is being achieved, as a result of the original command input, the steering gear follow-up mechanism is ______.

Leakage of hydraulic fluid from around the shaft of a hydraulic motor may be caused by ______.

An increase in the heat load to a refrigeration system will cause ______.

______ play a very important part in hydraulic systems by preventing interaction between different parts of the hydraulic circuit.

High-speed rotation in a centrifugal purifier can produce a force ______the force of gravity.

If the suction pressure for an operating refrigeration compressor is below normal, the cause may be ______.

Badly leaking refrigeration compressor discharge valves will cause ______.

Sub-cooling is a method of reducing the temperature of the liquid refrigerant below its ______.

The heat gained per pound of refrigerant in the evaporator is known as the ______.

The sensing line for the low pressure cutout switch to a refrigeration system is located ______.

If liquid refrigerant accidentally comes in contact with the eyes, _____ immediately.

Propeller pitch speed minus ship speed divided by the propeller pitch speed is termed ______.

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

Because of the high loads the bearing material is a tin-aluminum(锡-铝) alloy bonded to a steel shell. The crosshead pin is highly polished to a______.

Prolonged operation of a diesel engine with a closed cooling water system, at lower than normal designed operating temperatures can ______.

High diesel engine cooling water temperatures can be caused by ______.

Wear occurring at the tips of the reduction gear teeth is usually the result of ______.

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

Adjust ______by means of lead wire.

One cylinder of a diesel engine is persistently knocking and does not cease(停止) when the fuel supply to that cylinder is secured.Which of the following problems may be the cause?

In a diesel engine, late fuel injection is indicated by black or gray exhaust smoke with ______.

Among the rings of a piston the ______one is subjected to the greatest load and temperature.

Maintaining the lowest possible scavenging air temperature at all times is not recommended due to the possibility of the ______.

Loss of lubricating oil pressure to the main propulsion diesel engine will actuate a/an ______.

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

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

The diesel engine is similar to the gasoline engine in that______.

Fuel is admitted to a diesel engine cylinder through the ______.