Properly of low temperature co-eflficient of heating element is desired due to which of the following reasons ?

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Heat is transferred simultaneously by condition, convection and radiation_____________?

A. inside boiler furnaces B. during melting of ice C. through the surface of the insulted pipe carrying steam D. from refrigerator coils to freezer of a refrigerator...

In the indirect resistance heating method, maximum heat-transfer takes place by____________?

A. radiation B. convection C. conduction D. any of the above...

For heating element high resistivity material is chosen to______________?

A. reduce the length of heating element B. increase the life of the heating element C. reduce the effect of oxidation D. produce large amount of heat...

Which of the following insulating materials was suitable for low temperature applications ?

A. Asbestos paper B. Diatomaceous earth C. 80 percent magnesia D. Cork...

In heating the ferromagnetic material by induction heating, heat is produced due to_____________?

A. induced current flow through the charge B. hysteresis loss taking place below curie temperature C. due to hysteresis loss as well as eddy current loss takingplace in the charge D. none of the above factors...