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__________ wire is never used for making the heating element.

A. Nichrome

B. Kanthal

C. Invar

D. None of these

Correct Answer : C.


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  1. About __________ ton of coke is required in a cupola to produce one ton of casting.
  2. Babbitt lining is used on brass/bronze bearings to increase the
  3. Which of the following materials has the maximum shrinkage allowance?
  4. Maximum amount of thermal radiation is emitted at all wavelengths at any specified temperature by a/an…
  5. A solar cell converts the sunlight directly into __________ energy.
  6. Which of the following is the most wear resistant grade of carbide used for the cutting tools?
  7. The minimum and the maximum number of members required to form a Private Limited Joint Stock Company…
  8. Transition from laminar to turbulent zone in free convection heat transfer is governed by the critical…
  9. All the atoms of the world comprise of electrons, proton & neutron except that of __________ atom in…
  10. Increase in temperature, in general results in the
  11. The order of a chemical reaction
  12. Work study deals with the __________ study.
  13. Screws are specified by their __________ diameters.
  14. Hydrogen in liquid steels is dissolved
  15. Which of the following processes follows the hardening process for reducing the hardening strains &…
  16. Main constituent of bone ash is
  17. Resistance of an electrical conductor is proportional to its (where, l = length and A = cross-sectional…
  18. Load cells used for the measurement of weight has
  19. __________ is the most suitable lubricant for drawing mild steel wires?
  20. The majority charge carriers in p-type silicon are
  21. __________ property of a material is determined by the Herbert Pendulum device.
  22. Which of the following metals reacts violently with water?
  23. With increase in __________ Knocking tendency in a spark ignition petrol engine decreases.
  24. Pick out the wrong statement.
  25. Corrosion is
  26. Rankine cycle comprises of two isothermal and two __________ processes.
  27. A material subjected __________ must have high resilience.
  28. With increase in impurities in metals, their corrosion resistances
  29. Dowtherm is a
  30. Stellite is a __________ material.