Variant 3
Vocabulary
Match the words with their definitions.
| furnace | a | it is used to heat up the combustion air entering the furnace | |
| combustion chamber | b | the liquid refrigerant changes state from a liquid into a vapor in it | |
| air heater | c | chamber within an engine in which ignition of fuel takes place | |
| floor tubes | d | apparatus that generates heat | |
| evaporator | e | are used for heating feed water |
1___, 2___, 3___, 4___, 5___ 10/___
Underline the appropriate words.
1) The general construction of most axial-flow compressors is very different/similar/unlike to that of a steam turbine, although the influence of aero-experience may be seen.
2) Silver is the worst/best/common conductor.
3) Cables with shaped-conductors and cores are usually smaller and heavier/easier/lighter cables with circular cores.
4) When alternators are of sufficient size and are operating at different frequencies and terminal voltages, severe damage may result if they are suddenly connected to each other through a different/common/various bus.
5) Single fuse units have four/three/five wires.
6) The furnace, the combustion chamber and the tubes are all surrounded by water/oil/petrol.
7) To increase the efficiency of the boiler, the feed water that enters the boiler is under/pre/over heated with the help of an economizer through which, the feed water passes before entering the boiler.
8) Turbocharger consists of a blower and a turbine assembly mounted on three/one/two ends of a shaft.
9) Shaft generator is a machinery system where an alternator is connected under/over/next to the shaft of the main engine.
10) In turbine generator steam is used with high pressure to rotate shaft/casing/turbine where the thermal energy of the steam gets converted into rotary motion.
10/___
Fill in the gaps with the words.
| closed-loop liquid-cooled rotation voltage coil-bar stator windings generator |
1) The air-cooled_______________ is well-suited to the cyclic and peak operating mode, allow achieving the high extent of automatization of the technological processes, reducing the operation costs significantly.
2) Air-cooled generators operate with _____________ cooling system.
3) The coil and _____________ allow to reduce a length of generator and increase its specific weight characteristics.
4) The construction peculiarity of _____________ generator is a filling of the stator volume with the heat resistance dielectric liquid that is also the cooling medium and a stator insulation system component.
5) A zener diode is designed for a constant _____________ output, no matter what the input voltage is, they will give a constant dc voltage output.
6) Tachogenerators can also indicate the direction of_____________ by the polarity of the output voltage.
12/___
Grammar
Choose the correct form of the verbs.
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|
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1) The AB can/could/will be able to do this work tomorrow.
2) The watch keeper will identify/identified/identify the debris 10 minutes ago.
3) The crewmembers can/must/may keep the gangway area clean.
4) The electrician is /was/will be repairing the radio now.
5) All the electrical equipment was/is/were damaged by the water yesterday.
6) Our Bosun always performs/performed/has performed his duties perfectly.
7) The doctor has examined/examines/will examine all crewmembers thoroughly and now they can continue their voyage.
7/___
Choose the proper word.
1) The air pressure under/in front of/at the delivery end may be several times that of the inlet
2) The primary/secondary/fourth winding of the transformer, fixed to the rotor, is excited by a sinusoidal electric current ac.
3) Control type synchros are used in applications that require the largest/large/larger torques.
4) Receiving electricity from land-based networks should only be carried without/between/out through the ships switchboard Shore power.
5) Power supply vessel from shore power must be carried out by/at/in regular hose cable.
6) It may be said in general that the axial compressor is the most/more/better compact of the two in the matter of overall diameter.
7) The operation of a centrifugal compressor is analogous above/to/within an ordinary centrifugal water pump.
8) The armature rotates below/at/within a fixed magnetic field, so that its rotation induces electromotive force (voltage) proportional to the shaft speed.
9) The process of steam generation starts when the feed water enters the steam drum through/behind/under both internal tubes and the tubes that surround the furnace.
10) The furnaces are located above/below/among the tubes and drum.
20/___
Match the questions with the answers.
| What information did he transmit? | a | On the box in the engine room | |
| Why were the bearings in bad operation condition? | b | The chief engineer can | |
| Where have you put safety glasses? | c | At 2 p.m. tomorrow | |
| Who can give the newcomers a good advice? | d | Because of overheating of bearings | |
| How will they keep dairy products? | e | About oil spill near the coast | |
| When is the vessel leaving the port? | f | The surveyor has | |
| Which of the visitors has necessary documents? | g | They will put them into refrigerators |
1___, 2___, 3___, 4___, 5___, 6___, 7___ 7/___
Reading
