Variant 5
Vocabulary
Match the words with their definitions.
| igniter | a | a valve for use with liquid or gas, which is controlled by an electric current through a solenoid coil | |
| solenoid valve | b | this eye is not natural, but is artificial, fitted in a boiler combustion chamber for detection of flame putting out | |
| draft flap | c | a device for igniting a fuel mixture in an engine | |
| flame eye | d | repeated failures of machinery take place | |
| operating trips | e | a piece of something thin, such as cloth, paper, or metal, hinged or attached only on one side, that covers an opening or hangs down from something |
1___, 2___, 3___, 4___, 5___ 10/___
Underline the appropriate words.
1) From the condenser the refrigerant liquid flows/flies/evaporates through a controlling expansion valve designed to regulate it so that it is at the correct pressure for its re-entry into the evaporator.
2) In the compressor the refrigerant vapor is subjected to high/low/average pressure as it is compressed.
3) The super-heated vapor and below/above/under the pressure enters the condenser where the refrigerant condenses into its liquid state once again through the heat-exchange process.
4) When the rotor and rotor blades are driven round by external power they act somewhat like a number of ordinary desk fans arranged in parallel/series /both in series and in parallel.
5) The blades of axial compressors are generally designed to conform to one or other variation of the so-called vortex/complex/botox principle.
6) The basic construction of a reciprocating compressor is unlike/different/similar to that of internal combustion engine.
7) In ac tachogenerators the magnetic field can be obtained by using ohmmeter/voltmeter/electromagnet or permanent magnet.
8) Servomotors use servomechanism to achieve closed loop/open loop/manual control with a generic open loop motor.
9) Diodes are used for ac to dc conversion for a lost/given/found power rating.
10) The servomotor is a closed loop servomechanism that uses position feedback to control its motion and final/initial/middle position.
10/___
Fill in the gaps with the words.
| comprise power electric system insulating resistors in series switchboard |
1) The compound circuit is a type of circuit where the elements are connected both _______________ and in parallel.
2) A ships _____________ cables form an integral part of the electrical system on board the ship.
3) Electric cables_____________ of two basic materials namely insulating and conducting materials.
4) An indicator light is to be provided at the main or emergency_____________ to which shore power is connected to show energized status of the cable.
5) Hybrid system consisting of an advanced_____________ for conditioning the power generated from shaft generator so that the supply to the switchboard always remains constant at any engine speed.
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6) Among electronic passive components are familiar two-terminal components such as_____________, capacitors, inductors and transformers.
12/___
Grammar
Choose the correct form of the verbs.
1) During the maneuvering operations there was/were/are emergency situation the day before yesterday.
2) The electrician will repair/repairs/repair the crane tomorrow.
3) He has/have/is taken up his mind to be a seafarer.
4) Two seafarers will be/ are/were punished by the local authorities two weeks ago.
5) If you smuggle things be ready to pay/paid/pays a fine.
6) The master warned about the piracy attack and ask/asked/send for military forces.
7) The weather is fine and we can/could/must sunbathe.
7/___
Choose the proper word.
1) Direct current is an electric current that flows in/for/through one direction only and doesnt change its direction and magnitude
2) Electrode is a conductor during/across/through which electricity enters or leaves an object, substance, or region.
3) Passive electronic components cannot supply energy ourselves/themselves/yourselves.
4) The range of engine speeds within which the shaft generator can be operated/operating/to operate is generally 90% to 100% of the normal value.
5) All shaft alternator systems have one thing in common: the active power required for the mains is generated to/for/by the main engine.
6) The operator must adjust the incoming generator speed (and voltage if necessary) obtaining/to obtain/obtained synchronized conditions.
7) After the silver element has fused the indicator wire will heat up sufficiently/sufficient/the most sufficient to ignite the indicator powder and the enclosed fuse will be blown.
8) The modern application of the shaft generator includes its function/functioning/to function as a motor by taking power from the electrical plant of the ship to drive the propeller at reduced speed.
9) The fresh water generator works on the principle that the boiling/boiler/to boil point of water can be brought down to reduce the pressure of the atmosphere surrounding it.
10) Boilers on ships are used for supplying steam during/through/for various processes such as pumping, heating, cooling, cleaning and hot-water for the accommodation.
20/___
Match the questions with the answers.
| What should you do when forced draft fan is not running? | a | The electrician must | |
| Why do we have power failure problems? | b | Igniter cable is damaged | |
| Where do we have damage? | c | The first one | |
| Who must replace the sensors? | d | I should start the draft fan manually | |
| How will he eliminate fluctuation of outgoing voltage? | e | About 3 hours ago | |
| When did you reset reference voltage? | f | He will set the brushes correctly | |
| Which of these boilers is clogged? | g | Because the containers gauges and digital readouts are completely dead |
1___, 2___, 3___, 4___, 5___, 6___, 7___ 7/___
Reading
