A. Indirect arc furnace
B. Core less furnace
C. Either of the above
D. None of the above
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Related Mcqs:
- Induction furnaces are employed for which of the following ?
- A. Heat treatment of castings B. Heating of insulators C. Melting aluminium D. None of the above...
- By the use of which of the following, high frequency power supply for induction furnaces can be obtained ?
- A. Coreless transformers B. Current transformers C. Motor-generator set D. Multi-phase transformer...
- Direct arc furnaces have which of the following power factors ?
- A. Unity B. Low, lagging C. Low, leading D. Any of the above...
- Which of the following methods is used to control temperature in resistance furnaces ?
- A. Variation of resistance B. Variation of voltage C. Periodical switching on and off of the supply D. All of the above methods...
- It is desirable to operate the arc furnaces at power factor of_____________?
- A. zero B. 0.707 lagging C. unity D. 0.707 leading...
- Which of the following insulating materials was suitable for low temperature applications ?
- A. Asbestos paper B. Diatomaceous earth C. 80 percent magnesia D. Cork...
- Which of the following is an advantage of heating by electricity ?
- A. Quicker operation B. Higher efficiency C. Absence of flue gases D. All of the above...
- Which of the following heating methods has maximum power factor ?
- A. Arc heating B. Dielectric heating C. Induction heating D. Resistance heating...
- By which of the following methods the temperature inside arc nace can be varied ?
- A. By disconnecting some of the heating elements B. By varying the operating voltage C. By varying the current through heating elements D. By any of the above method...
- The temperature inside a furnace is usually measured by which of the following ?
- A. Optical pyrometer B. Mercury thermometer C. Alcohol thermometer D. Any of the above...
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