Objective type question for utilization of electrical power

Q1.what are the type of heat transfer mode?

Ans. Three

Q2.what is the temperature coefficient of resistance of good heating element?

Ans. Low

Q3.what is the melting temperature of heating element?

Ans. High

Q4. ...... temperature coefficient of resistance .

Ans. Positive.

Q5.what is the percentage of Ni in the alloy of nickel & chromium in the material of heating element?

Ans. 80%

Q6. Which type of material used in Carbon electrode.

Ans. Anthracite coal and coke.