Height of coke oven is limited (say maximum upto 7 metres) mainly by the_____________________? A. Problem of uniform heating along its height B. Structural strength of silica bricks C. Problem in door cleaning D. Buckling of ram of pusher car…
Steam is intermittently admitted into the fuel bed during the production of producer gas to__________________? A. Convert CO to CO2 B. Increase the combustion rate C. Increase the gas production rateD. Minimise the chances of clinker formation
Which of the following coke has the least percentage of ash ? A. Petroleum coke B. Beehive coke C. Foundry coke D. Metallurgical coke
The weathering index of a coal________________? A. Gives an idea of the fusion temperature of ash B. Is related to its calorific valueC. Is a measure of its size stability, when stored & exposed to weather D. Is a measure…
Blast furnace gas is a very poisonous gas because of its predominantly high _______________ content? A. H2O B. CO2C. CO D. CH4
Stoichiometric combustion of 12 kg of carbon requires _____________ of oxygen? A. 1kg mole B. 22.4 Nm3 C. 32 kgD. All A., B. and C.
Adiabatic flame temperature of a fuel is dependent on the initial temperature of___________________? A. Fuel B. AirC. Both A. & B. D. Neither A. nor B.
Main constituents of Benzol are ____________________? A. Benzene, toluene & xylene B. Tar & creosote C. Ammonia & phenol D. Anthracene & phenol
Gobar gas is produced by the ______________ of cow dung? A. Fermentation B. Oxidation C. Hydrogenation D. None of these
Hard pitch is used for making_____________________? A. Pulverised fuel B. Perfumes C. Insecticides D. Plastics