The most serious manufacturing defect from fracture toughness point of view is

A. Surface roughness

B. Pores

C. Spherical inclusion

D. Crack

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  1. Laser is a device to produce
  2. Name the safety device used to protect the boiler, when the water level falls below a minimum level.
  3. In chemical dehumidification of air
  4. The temperature at which ferromagnetic material can no longer be magnetised by the outside forces, is…
  5. While the bin cards are used in the effective stores management, the queuing theory is associated with…
  6. __________ temperature remains constant during adiabatic saturation process of unsaturated air.
  7. Insulation of liquid surface can be achieved by __________ on top of its surface.
  8. __________ is the hardest oxide and is hence used where high wear resistance at high temperature is…
  9. The friction factor for the turbulent fluid flow in a rough pipe does not depend upon the
  10. CANDU type nuclear reactor using natural uranium as fuel is the extensively used nuclear reactor because…
  11. To improve the machinability of steel, it is generally subjected to
  12. The amount of different substances produced, when the same quantity of electricity is passed through…
  13. Stresses encountered in the metal forming processes are less than the __________ of the material.
  14. Cascade control is
  15. Silicon in steel
  16. Holes for riveting purposes should be preferably made by
  17. In inventory control theory, the economic order quantity (EOQ) is the
  18. The bank of tubes located at the back of the domestic refrigerators are the __________ tubes.
  19. Eutectic reaction for iron-carbon system occurs at a temperature of __________ °C.
  20. Joining of thin foils is preferred to be done by
  21. Brittleness induced due to the presence of sulphur in steel can be reduced by adding
  22. Which of the following metals is not subjected to electrolytic refining/purification?
  23. Strain hardening effect in metals subjected to cold working is due to the __________ mechanism.
  24. Electrometallurgy is not involved in the extraction of __________ from its ore.
  25. Which of the following is preferred for riveting?
  26. __________ joint is mostly used for joining pipes carrying water at low pressure.
  27. Which of the following is normally not found in both the S.I. (petrol) & C.I. (diesel) engines?
  28. Frother is added in the froth floatation cell used in ore beneficiation to stabilise the air bubbles…
  29. Vibration upto 100 kilo hertz can be most accurately measured by a __________ type accelerometer.
  30. Which of the following is not a principal alloying element for the structural steel?