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MCQs 1: In resistance heating highest working temperature is obtained from heating elements made of_____________?

nickel copper nichrome silicon carbide silver
Answer Explanation

MCQs 2: For heating element high resistivity material is chosen to______________?

reduce the length of heating element increase the life of the heating element reduce the effect of oxidation produce large amount of heat
Answer Explanation

MCQs 3: In the indirect resistance heating method, maximum heat-transfer takes place by____________?

radiation convection conduction any of the above
Answer Explanation

MCQs 4: For intermittent work which of the following furnaces is suitable ?

Indirect arc furnace Core less furnace Either of the above None of the above
Answer Explanation

MCQs 5: Induction heating takes place it which of the following ?

Insulating materials Conducting materials which are magnetic Conducting materials which are non-magnetic Conducting materials which may or may not be magnetic
Answer Explanation

MCQs 6: By which of the following methods the temperature inside arc nace can be varied ?

By disconnecting some of the heating elements By varying the operating voltage By varying the current through heating elements By any of the above method
Answer Explanation

MCQs 7: In induction heating ___________ is abnormally high?

phase angle frequency current voltage
Answer Explanation

MCQs 8: In a resistance furnace the atmosphere is_____________?

oxidizing deoxidising reducing neutral
Answer Explanation

MCQs 9: Which of the following has the highest value of thermal conductivity ?

Water Steam Sold ice Melting ice
Answer Explanation

MCQs 10: Heat transfer by condition will not occur when____________?

bodies are kept in vacuum bodies are immersed in water bodies are exposed to thermal radiations temperatures of the two bodies are identical
Answer Explanation

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