Heating And Welding — Part 2 MCQs with Explanations

Diatomaceous earth is the correct answer to “Which of the following insulating materials was suitable for low temperature applications”. This question is standard in competitive examination syllabi for Heating And Welding.

By any of the above method is the correct answer to “By which of the following methods the temperature inside arcane can be varied”. This question is standard in competitive examination syllabi for Heating And Welding.

All of the above methods is the correct answer to “Which of the following methods is used to control temperature in resistance furnaces”. This question is standard in competitive examination syllabi for Heating And Welding.

0.707 lagging is the correct answer to “It is desirable to operate the arc furnaces at power factor of”. This question is standard in competitive examination syllabi for Heating And Welding.

True is the correct answer to “In an electric room heat convector the method of heating used is Resistance heating”. This question is standard in competitive examination syllabi for Heating And Welding.

All of the above ways is the correct answer to “Resistance variation method of temperature control is done by connecting resistance elements in”. This question is standard in competitive examination syllabi for Heating And Welding.

Due to hysteresis loss as well as eddy current loss taking place in the charge is the correct answer to “In heating the ferromagnetic material by induction heating, heat is produced due to”. This question is standard in competitive examination syllabi for Heating And Welding.

All of the above is the correct answer to “Which of the following is an advantage of heating by electricity”. This question is standard in competitive examination syllabi for Heating And Welding.

Series-parallel operation is the correct answer to “In a domestic cake baking oven the temperature is controlled by”. This question is standard in competitive examination syllabi for Heating And Welding.

Temperature on the outer surface of furnace walls will drop is the correct answer to “Which of the following will happen if the thickness of refractory wall of furnace is increased”. This question is standard in competitive examination syllabi for Heating And Welding.

Indirect arc furnace is the correct answer to “For intermittent work which of the following furnaces is suitable”. This question is standard in competitive examination syllabi for Heating And Welding.

All of the above is the correct answer to “Due to which of the following reasons it is desirable to have short arc length”. This question is standard in competitive examination syllabi for Heating And Welding.

Current is the correct answer to “In direct arc furnace, which of the following has high value”. This question is standard in competitive examination syllabi for Heating And Welding.