Technical English Task

Analyzing Electrical Text

By :

Khairunnisa Patsal Yulia Rezky

Safitri

321 11 031 321 11

078

THE STUDY PROGRAM OF ELECTRICITY

ELECTRICAL ENGINEERING DEPARTMENT

THE STATE POLYTHECNIC OF UJUNG PANDANG

MAKASSAR 2013Technical English Task

Analyzing Electrical Text

By :

Hamzah

Muh.Khaedir Asy’ari

321 11 045 321 11

049

THE STUDY PROGRAM OF ELECTRICITY

ELECTRICAL ENGINEERING DEPARTMENT

THE STATE POLYTHECNIC OF UJUNG PANDANG

MAKASSAR 2013

UNIT 1EXERCISE A

1. The flow (movement) of free electrons is an electric current.

2. Materials in the first group (category) are called conductrors.

3. Materials (Subtances) which provide a path for an electric current are conductors.

4. All insulators will permit (allow) some flow of electrons.

5. Germanium sometimes acts (behaves) as an insulator and sometimes as a conductors.

EXERCISE B

1. All materials can be classified into three groups according to how readily they permit

electric current to flow.

= B.All materials

2. Under certain conditions they allow a current to flow easli butunder others they behaveas

insulators.

= B. Semiconductors

3. These are known as thermistors.

= C. Mixtures of certain metallic oxides.

4. They are therefore used in temperature-sensing devices.

= A. Thermistors.

EXERCISE C

1. Electrons flow from positive to negative.

= False, movement of free electrons towards the positive end.

2. Copper provides an easy path for an electric current.

= True, copper is a good conductor, therefore it is widely used for cables.

3. All metals are good conductors.

= False, All metals are conductors, however some metals don’t conduct well.

4. All good conductors are metals.

= False, a non-metal which conducts well is carbon

5. Air is not a perfect insulator.

= True, there are no perfect insulators. All insulator will allow some flow of electrons.

6. Rubber readily releases electrons.

= False, rubber, nylon, porcelain and air are all insulators.There are no perfect insulators.

All insulator will allow some flow of electrons.

7. The resistance of a thermistor is higher at low temperatures than at high temperatures.

= True, the resistance of a thermistors falls rapidly as their temperature rises.

UNIT 12

1. In the 1st year capacity stood at 16000 MW.

2. In year 2 it decreased by 800 MW.

3. In the 3rd year it remained Constant at 15200 MW.

4. Then in the 4th year it decreased to 14800 MW.

5. And in year 5 we saw a small increase of 200 MW.

6. But in the 6th year capacity decreased to 14800MW.

7. This trend continued, and in the 7th year capacity decreased substantially by 800 MW.

8. There was a further a decrease of 200 MW in the 8th year.

9. And in year 9 capacity decreased to 13400 MW.

10. But in year 10 capacity showed a small increased of 200 MW.

UNIT 2 EXERCISE A

1. A lamp converts (changes) electrical energy into light.

2. The generator provides (supplies) the circuit with electromotive force.

3. The metal frame (chassis) of oscilloscope in pats of its transmission system.

4. The rheostat controls (regulates) the current floe in the circuit.

5. A battery of solar cells supplies (provides) power to the circuit.

EXERCISE B

1. Current moves from a point of high potensial energy to one of low potensial.

= C. A point.

2. For example , it may be a generator or battery.

= A. The source.

3. It is often possible, however , for the metal frame of a unit to be one section of its

transmission system.

= B. The unit’s.

4. Although the fungtion of this circuit is much more complex than that of the flashlight, it

too consist of the four basic elements.

= C. This circuit.

EXERCISE C

1. A difference in potential is required before current can flow in a circuit.

= True, This establishes the difference in potential which makes current flow possible

2. A generator is a source of electromotive force.

= True, The source provides the electromotive force … the source can be any device

which supplies electrical energy. For example, it may be a generator or a battery.

3. Loads convert electrical energy into light and heat.

= True, the load converts the electrical energy from the source into some other form

energy. For instance, a lamp changes electrical energy into light and heat.

4. Transmission system must consist of wires.

= False, most systems consist of wires. It’s often possible, however, for the metal frame

of a unit … for example, the metal chassis of many electrical devices are used to conduct

current.

5. A rheostat may be used as a control.

= True, it may control the current by limiting it, as does a rheostat, or by interrupting it,

as does a switch.

6. The load in the flashlight circuit is a bulb.

= True, the load is a 0.3 W bulb.

7. The source in the satellite circuit is a solar cell.

= True, Here the source is battery of solar cells . a solar cells is an electric cell which

converts sunlight into electrical energy.

8. The current flow in the satellite circuit is regulated by a relay.

= True, The control is a relay actuated by transmission from ground control.

9. The flashlight circuit differs basically from the satellite circuit.

= False, Because the circuits are same.