Iw #14.1 gas welding

1. Read and translate the text in a written form.

This process embraces several procedures. Joining of the base metals is achieved in most cases by fusion of a metal deposited between the surfaces of the metals to be joined, no pressure being required to accomplish the weld. In some cases the heated edges are fused without the deposit of metal.

In gas welding, the fusion heat (which is very high) is supplied by combining suitable gases. All gas welding-process utilize oxygen combined with acetylene and other fuels.

The welding torch or blowpipe consists essentially of a gas mixing chamber and usually is designed in two types: the low-pressure of injection type and the equal-pressure type.

Word List:

	gas welding	газовая сварка
	in most cases	в большинстве случаев
	surface	покрытый
	to require	поверхность
	the metals to be joined	свариваемые металлы
	low-pressure of injection type	инжекторная ,горелка с низким давлением
	equal pressure	равномерное давление

Questions:

1. What procedures does this process embrace?

2. What way is the fusion heat (which is very high) supplied by?

3. What is the welding torch or blowpipe consist essentially of?

Iw #14.2 Gas Welding (Part 2)

Gas welding is a non-pressure process using heat from a gas flame. The flame is applied directly to the metal edges to be joined and simultaneously to a filler metal in the form of wire or rod, called the welding rod, which is melted to the joint. Gas welding has the advantage of using equipment that is portable and does not require an electric power source. The surfaces to be welded and the welding rod are coated with flux, a fusible material that shields the material from air, which would result in a defective weld.

Word List:

flame – пламя

edge - край

simultaneously – одновременно

filler – наполнитель

wire – проволока

rod - прут, стержень

to melt - плавить(ся)

joint - соединение, стык

advantage - преимущество

to require - требовать нуждаться

surface - поверхность

coated - покрытый

flux – флюс

fusible - плавкий

to shield - заслонять, защищать

Iw #15 what is a computer?

1. Read and translate the text in a written form.

The term computer is used to describe a device made up of a combination of electronic and electromechanical (part electronic and part mechanical) components. Computer has no intelligence by itself and is referred to as hardware. A computer system is a combination of five elements:

• Hardware

• Software

• People

• Procedures

• Data/information

When one computer system is set up to communicate with another computer system, connectivity becomes the sixth system element. In other words, the manner in which the various individual systems are connected — for example, by phone lines, microwave transmission, or satellite — is an element of the total computer system.

Software is the term used to describe the instructions that tell the hardware how to perform a task. Without software instructions, the hardware doesn't know what to do. People, however, are the most important component of the computer system: they create the computer software instructions and respond to the procedures that those instructions present.

The basic job of the computer is the processing of information. Computers accept information in the form of instruction called a program and characters called data to perform mathematical and logical operations, and then give the results. The data is raw material while information is organized, processed, refined and useful for decision making. Computer is used to convert data into information. Computer is also used to store information in the digital form.