‘Fuel’ can be defined as a substance which produces heat by___________________?

Related Mcqs:

1. Fuel consumption in coke making can be reduced by___________________?

   A. Preheating, blending and de-ashing the coal
   B. Stamped charging of coal
   C. Dry quenching of coke
   D. All A., B. and C.

2. The lowest temperature, at which a solid fuel produces enough vapors to support continuous combustion, is called ?

   A. Fire point
   B. Smoke point
   C. Burning temperature
   D. Kindling temperature

3. Theoretical flame temperature of a fuel is that temperature which is attained, when the fuel is completely burnt ‘using theoretical amount of air in___________________?

   A. Air
   B. Oxygen
   C. Either A. or B.
   D. Either A. or B. without gain or loss of heat

4. Gasification of the solid fuel converts its organic part into combustible by interaction with air/oxygen and steam so as to obtain a secondary gaseous fuel of high calorific value having no ash. Gasification reactions are normally carried out at about _____________ °C?

   A. 400-500
   B. 900-1000
   C. 1400-1500
   D. 1700-1800

5. For which pair of the fuel gases, calorific value (C.V.) of one fuel is almost double that of the other on volume basis (i.e., kcal/Nm3), while the C.V. is same on weight basis (i.e., kcal/kg) ?

   A. Propane and acetylene
   B. Propane and LPG
   C. Sewage gas and gobar gas
   D. B.F. gas and coke oven gas

6. For the case of a fuel gas undergoing combustion with air, if the air/fuel ratio is increased, the adiabatic flame temperature will_____________________?

   A. Increase
   B. Decrease
   C. Increase or decrease depending on the fuel type
   D. Not change

7. If the specific heat of gaseous products of combustion of a fuel is high, the abiabatic flame temperature will be_____________?

   A. Low
   B. High
   C. Very high, if the fuel is of low calorific value
   D. None of these

8. A fuel with high heat release rate will_________________?

   A. Require smaller combustion chamber
   B. Have high calorific value
   C. Have high adiabatic flame temperature
   D. None of these

9. Lurgi gasifier (high pressure gasifier) as compared to Kopper Totzek gasifier (atmospheric pressure gasifier) produces __________________?

   A. Higher amount of methane
   B. Lower amount of hydrogen
   C. Both A. and B.
   D. Higher amount of both methane and hydrogen

10. Efficiency of the combustion of a fuel is judged by the ______________ the flue gas?

    A. % of CO2 in
    B. % of O2in
    C. Temperature of
    D. Colour of