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Coke is produced

A. When coal is first dried and then crushed to a fine powder by pulverising machine

B. From the finely ground coal by moulding under pressure with or without a binding material

C. When coal is strongly heated continuously for 42 to 48 hours in the absence of air in a closed vessel

D. By heating wood with a limited supply of air to a temperature not less than 280°C

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  1. The absolute zero pressure can be attained at a temperature of
  2. The stress induced in a body due to suddenly applied load compared to when it is applied gradually is
  3. In the below figure, the stress corresponding to point D is
  4. The torque transmitted by a solid shaft of diameter (D) is (where τ = Maximum allowable shear stress)
  5. The deformation of a bar under its own weight is _________ the deformation, if the same body is subjected…
  6. The layer at the centre of gravity of the beam as shown in the below figure, will be
  7. A composite bar made up of steel and copper bars of equal lengths are heated through 100°C. The…
  8. Flow stress corresponds to
  9. For the constant pressure and heat input, the air standard efficiency of gas power cycle is in the order
  10. When a bar is cooled to - 5°C, it will develop
  11. The mass of carbon per kg of flue gas is given by
  12. The fuel mostly used in blast furnace for extracting pig iron from iron ores is
  13. The deformation per unit length is called
  14. When a body is subjected to a direct tensile stress (σx) in one plane accompanied by a simple shear…
  15. A closely-coiled helical spring is cut into two halves. The stiffness of the resulting spring will be
  16. A cylindrical section having no joint is known as
  17. The ratio of molar specific heats for mono-atomic gas is
  18. A circular shaft fixed at, A has diameter D for half of its length and diameter D/2 over the other half,…
  19. When a closely-coiled helical spring of mean diameter (D) is subjected to an axial load (W), the stiffness…
  20. A bar of copper and steel form a composite system, which is heated to a temperature of 40°C. The…
  21. If the radius of wire stretched by a load is doubled, then its Youngs modulus will be
  22. The amount of heat generated per kg of fuel is known as
  23. The most probable velocity of the gas molecules is given by
  24. The bending stress in a beam is _________ section modulus.
  25. In order to prevent crushing of masonry at the base of the dam, the maximum stress should be __________…
  26. The general gas energy equation is (where Q1 - 2 = Heat supplied, dU = Change in internal energy, and…
  27. Two closely coiled helical springs 'A' and 'B' are equal in all respects but the number of turns of…
  28. For same compression ratio and for same heat added
  29. One kg of carbon monoxide requires _______kg of oxygen to produce 11/7 kg of carbon dioxide gas.
  30. Stirling and Ericsson cycles are