A. LPG is also used as fuel for automobiles & small furnaces and for cutting & welding of
metals
B. The minimum temperature, at which a petroleum oil vapor catches fire and continues to burn,
is called its flash point
C. Each ton of petroleum oil on distillation produces about 30-50 Nm3 of gas
D. Maximum yield of naphthalene is obtained on distillation of crude oil
Related Mcqs:
- Pick out the wrong statement ?
A. Angle of repose of coal increases with its increasing size
B. Specific gravity of coal increases with its increasing maturity
C. Refractive index and reflectance of coal increases with the increasing rank of coal
D. Specific heat of coal decreases with increases in the volatile matter and decrease in the C/H
ratio of coal - Pick out the wrong statement ?
A. Pulverised fuel can be completely burnt with less percentage of excess air compared to lump
coal
B. Low grade coal can be used, but generally high volatile matter coals are more suitable for
making pulverised fuel
C. Regulation of furnace temperature and atmosphere (oxidising or reducing) is easily possible
with pulverised fuel firing
D. None of these - Pick out the wrong statement ?
A. Cokes of high reactivity are obtained from weakly coking coals
B. Cokes of high reactivity are obtained from strongly coking coals
C. Reactivity of coke is inversely proportional to its absolute density
D. Abrasion index of the coke is a measure of its hardness - Pick out the wrong statement ?
A. Main constituents of LPG are propane and butane
B. C.V. of natural gas is about 10000 KCal/Nm3
C. C.V. of LPG is about 26000 kcal/Nm3 (11500 kcal/kg)
D. L.P.G. is lighter than air - Pick out the wrong statement ?
A. Theoretical flame temperature is the temperature attained by the products of combustion, when the fuel is burned without loss or gain of heat
B. Burning the fuel with theoretically required amount of pure oxygen results in attainment of maximum adiabatic flame temperature
C. Burning the fuel with excess pure oxygen results in maximum theoretical flame temperature
D. Adiabatic flame temperatures of actual combustions are always less than the maximum values - Pick out the wrong statement ?
A. High concentration of oxygen in flue gas means high stack loss
B. Gaseous fuels require the least % excess air for complete combustion
C. The ratio of fixed carbon to volatile matter percentage in coal is called its ‘fuel ratio’
D. Calorific value of natural gas is more than that of LPG - Pick out the correct statement ?
A. Oxygen content decreases from lignite to bituminous coal as the coalification increases
B. The less the oxygen content, better is the coal, as it reduces the calorific value
C. With increase in oxygen content, moisture holding capacity of coal increases and the caking power decreases
D. All A., B. and C. - Pick the odd man out?
A. Briquettes
B. Wood
C. Oil gas
D. Pitch creosote mixture - Calorific value of wood gas is about ______________ kcal/Nm3?
A. 1500
B. 3300
C. 5400
D. 8500 - The main product of high temperature carbonisation of coal is__________________?
A. Coke
B. Ammonia
C. Tar
D. Coke oven gas
