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Heating And Welding QUESTIONS AND ANSWERS

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

Heating And Welding QUESTIONS AND ANSWERS

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