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  • Question
  • An electric furnace producing heat by means of an electric arc struck between each of three electrodes and the charge is called __________ furnace.


  • Options
  • A. resistance
  • B. arc
  • C. low frequency induction
  • D. none of these

  • Correct Answer
  • arc 


  • More questions

    • 1. Which of the following is an undesirable dynamic characteristic of an instrument?

    • Options
    • A. Reproducibility
    • B. Dead zone
    • C. Time lag
    • D. Static error
    • Discuss
    • 2. Which of the following thermocouples will give the highest output for the same value of hot and cold junction temperature?

    • Options
    • A. Platinum-platinum + rhodium.
    • B. Iron-constantan.
    • C. Chromel-constantan.
    • D. All will give the same output.
    • Discuss
    • 3. Which of the following controllers has the least maximum deviation?

    • Options
    • A. P-controller
    • B. P-I controller
    • C. P-I-D controller
    • D. P-D controller
    • Discuss
    • 4. Which of the following relates the emf. generated in a single homogeneous wire to the temperature difference?

    • Options
    • A. Peltier effect
    • B. Thomson effect
    • C. Seebeck effect
    • D. none of these
    • Discuss
    • 5. Which of the following will give maximum gas conversion?

    • Options
    • A. Fixed bed reactor.
    • B. Fluidised bed reactor.
    • C. Semi-fluidised bed reactor.
    • D. Plug-flow catalytic reactor.
    • Discuss
    • 6. 6 gm of carbon is burnt with an amount of air containing 18 gm oxygen. The product contains 16.5 gms CO2 and 2.8 gms CO besides other constituents. What is the degree of conversion on the basis of disappearance of limiting reactant?

    • Options
    • A. 100%
    • B. 95%
    • C. 75%
    • D. 20%
    • Discuss
    • 7. The melleability of a material is the property by virtue of which it can be rolled or hammered into thin sheets. Which of the following materials has the miximum malleability?

    • Options
    • A. Lead
    • B. Copper
    • C. Aluminium
    • D. Wrought iron
    • Discuss
    • 8. Which of the following has the highest compressive strength?

    • Options
    • A. Wrought iron
    • B. Cast iron
    • C. Mild steel
    • D. High carbon steel
    • Discuss
    • 9. Which of the following stainless steels is non-magnetic?

    • Options
    • A. Ferritic
    • B. Martensitic
    • C. Austenitic
    • D. None of these
    • Discuss
    • 10. Which of the following is universally employed as the low expansion metal in the bimetallic thermometer, which is an iron-nickel alloy containing 36% nickel and has very low co-efficient of expansion (l/20th of ordinary metals)?

    • Options
    • A. Invar
    • B. Constantan
    • C. Chromel
    • D. Alumel
    • Discuss


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