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

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

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

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

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