Air/fuel ratio on molar (volume) basis for combustion of methane with theoretical quantity of air with be

A. 9.5 : 1

B. 12.5 : 1

C. 15.5 : 1

D. 18.5 : 1

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  1. Which of the following metals is the most prone to work hardening?
  2. The maximum thickness of the metal which can be welded using ultrasonic welding is __________ mm.
  3. Earing is a defect found in steels after the following metal working operation.
  4. Shaft/rotor speed is most accurately measured by a
  5. Name the safety device used to protect the boiler, when the water level falls below a minimum level.
  6. In case of brasses, with decreasing zinc percentage and increasing copper percentage, its __________…
  7. Which of the following equipments is used for liquid dispersion?
  8. __________ test determines the yield strength, Young's modulus of elasticity, percentage reduction in…
  9. With increase in temperature, the electrical conductivity of a __________ decreases.
  10. Dislocations are __________ defects.
  11. __________ flux is used for the extraction of metal from its self fluxing ores.
  12. Oxyacetylene reducing flame is used while carrying out welding on
  13. Which of the following is a commonly used manometric liquid for low pressure range?
  14. Fibrous fracture is normally encountered in the __________ materials.
  15. While the thermosetting polymers are amorphous in nature, the thermoplastic polymers are either amorphous…
  16. Which of the following processes follows the hardening process for reducing the hardening strains &…
  17. The main reducing agent in iron blast furnace is
  18. Materials having __________ lattice structure are usually the most ductile.
  19. A solution which resists change in its pH value on addition of acid/alkali is called the __________…
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