Page 36 - CITS - Welder - Trade Theory

WELDER - CITS

d Kilo Calories – This is unit of M.K.S system. Raising the temperature 1degree centigrade of one kilogram
of water the amount of heat required for is called 1°C kilocalorie.
1 kilo calories =1000 calories.
2 Temperature – It is effect of Heat. It detects the hotness and coolness of an object or body.

The instrument used to measure temperature is called Thermometer. It is filled with mercury. Different scales are
used to measure temperature.
a Centigrade scale - It is also known as Celsius scale. The scale starts at 0°C. Ice has a melting point 0°C
and water boiling point 100 °C.

b Fahrenheit Scale – It has a melting point of ice 32°F and 212°F boiling point. This scale is divided into 180
equal parts. Each part is call 1°F.This scale is used medical thermometer.

c Reaumur Scale – Reaumur scale unit (R°) are used to measure it. It has 0 to 80 marks. It has ice melting
point 0°C and a boiling point of water at 80°R. Its every part called 1°R.

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CITS : C G & M - Welder - Lesson 6&7