Question

which alloy used in cooker and bulb

Answer 1

The pressure cooker cooks food using super heated pressurised stream. Although stream and water both have temperature of 100°C (at sea level), stream contains heat that is required to convert water in liquid form to stream in has form. This is known as latent heat of steam (this is the principle of steam irons). When gas is pressurised, it heats up further. This stream becomes superheated. This stream may be as high as 250° C. It is highly dangerous.

In the pressure cooker the stream builds inside continuously when being heated. The weight (or whistle) prevents stream this build up extra stream and pressure. When sufficient pressure builds up to lift the weight, the stream escapes with a swwwwisshhh sound, which we call as the whistle.

But if the weight starts malfunctioning because it gets stuck, then pressure will continue to build beyond safety level. At this time, the safety valve is designed to burst and let the stream escape.

Answer 2

alluminium alloy use in cooker and bulb

thanks me