Pyrometer is used for measuring relatively high temperatures, such as are encountered in furnaces. Most pyrometers work by measuring radiation from the body whose temperature is to be measured. Radiation devices have the advantage of not having to touch the material being measured.
15) The instrument used to measure high temperature in the furnace is
Answer is:
Pyrometer
Explanation:
Related Heat Treatment MCQ with Answers
Answer is:
Induction hardening
Explanation:
Induction hardening is a method of surface-hardening in which the part to be surface-hardened is placed within an inductor coil through which a high frequency current is passed.
Induction hardening is a process used for the surface hardening of steel and other alloy components. The parts to be heat treated are placed inside a water cooled copper coil and then heated above their transformation temperature by applying an alternating current to the coil.
Answer is:
723 Degree Centigrade
Explanation:
The lower critical temperature is same for all steels Lower critical temperature for steels austenite-to-pearlite transformation is 1333 ºF (723 ºCelsius). Below this temperature, austenite doesnot exist.
Answer is:
To change the mechanical properties of steel
Explanation:
Heat treatment is the process of heating and cooling metals to change their microstructure and to bring out the physical and mechanical characteristics that make metals more desirable. The temperatures metals are heated to, and the rate of cooling after heat treatment can significantly change metal's properties.