Electrical Engineering Questions And Answers :: Heating And Welding: part2



Electrical Engineering : Heating And Welding QUESTIONS AND ANSWERS :: part2 : 1 to 5

Following Electrical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :

1.In resistance heating highest working temperature is obtained from heating elements made of

nickel copper
nichrome
silicon carbide
silver

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

To avoid initial rush of current
To avoid change in kW rating with temperature
Both (a) and (b)
Either (a) or (b)

3.In heating the ferromagnetic material by induction heating, heat is produced due to

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

4.Which of the following methods is used to control temperature in resistance furnaces ?

Variation of resistance
Variation of voltage
Periodical switching on and off of the supply
All of the above methods

5.For radiant heating around 2250�C, the heating elements are made of

copper alloy
carbon
tungsten alloy
stainless steel alloy

More Heating And Welding QUESTIONS AND ANSWERS available in next pages

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