4 Choose the correct form of the verbs.

1) The cook has used/used/uses foam extinguisher to extinguish that fire.

2) The holds are/were/will be full of cargo tomorrow.

3) Volt/Converter/Emf is an electrical unit for measuring the external force applied to a circuit to overcome the opposition to the flow of current.

4) The vessel operates/operated/will operate in this area next year.

5) The electrical engineer examines/examined/has examined the main switchboard very thoroughly yesterday.

6) We are/were/will be always allowed to use Internet on board.

7) The chief officer has/have/will informed the coastguard about the environmental problem.

7/___

5 Choose the proper word.

1) An electric current that changes both its direction and magnitude at/in/on fixed intervals of time is called ac

2) Synchros designed through/for/at terrestrial use tend to be driven at 50 or 60 hertz while those for marine use tend to operate at 400 hertz

3) Different makes of selsyns, used in interlock systems, have the most different/more different/ different output voltages.

4) Power take off system is incorporated with different kinds of frequency control system which makes sure of producing/production/ to produce power with constant frequency.

5) The tachogenerators use a rotation/to rotate/rotating armature, one end of which is attached to a machine shaft, to measure rotational speed.

6) The feed water gets to heat/heated/heating when passes through floor tubes.

7) In a torque system, a synchro will provide a low-power mechanical output sufficient to position an indicating device, actuate a sensitive switch or move light loads with/among/without power amplication.

8) High/higher/the highest voltage cables are to be installed on cable trays or equivalent when they are provided with a continuous metallic armor which is effectively bonded to earth.

9) Tinned copper fuse wire exposed to the atmosphere tends to deteriorate and will vary in performance before/after/during long periods in service.

10) Fuses are typically used for distribution applications and to the large/larger/large electrical devices such as motors, drives, etc.

20/___

6 Match the questions with the answers.

1	What is he doing now?	a	Because there were not any paints available
2	Why didn’t they paint the hull?	b	The deck cadet will
3	Where do they carry the cargo?	c	At midnight
4	Who will be on watch from 4 p.m. till 8 p.m?	d	He is having a rest
5	How do you receive the parcels?	e	The biggest one
6	When did the crewmembers cope with the emergency?	f	The third engineer delivers them
7	Which of these whales has trauma?	g	In containers

1___, 2___, 3___, 4___, 5___, 6___, 7___ 7/___

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