*The vapour compression refrigeration system is by far the most popular and widely used system in refrigeration and air conditioning...

Refrigerators are applicable for food preservation at the end user level. A refrigerator is an insulated box in which lower...

 Industrial factory lighting fittings Reflectors for industrial purpose must be simple in design and Easy to clean The requirements of...

When light falls on a surface, depending upon the nature of the surface, some portion of light energy is reflected,...

The colour rendering index (CRI), sometimes called as colour rendition index, is a quantitative measure of the ability of a...

All discussions made so far were based on the assumption that the luminous intensity or the candle power from a...

 Nature of light: Light is a form of radiant energy. Various forms of incandescent bodies are the sources of light...

Laser (Light amplification by stimulated emission of radiation) welding: In this method, bombardment of an atom by a proton of...

 Ultrasonic welding is a solid state welding process that produces coalescence of materials by the local applications of high frequency...

For shielded metal arc welding, there are two basic types of electrode coatings. These are the lime type indicated by...