Optimum preheating temperature for pitch creosote mixture (PCM) which is also termed as C.T.F-200, before atomisation through burners is_________________?

Related Mcqs:

1. Calorific value of pitch creosote mixture (PCM) i.e., C.T.F.-200 is about________________?

   A. 8800 kcal/m3
   B. 8800 kcal/kg
   C. Same as that of coal middling
   D. 25000 kcal/kg

2. Pitch creosote mixture (PCM) as compared to furnace oil is a better fuel, because its ___________________?

   A. Emissivity factor is higher
   B. Sulphur content is lower
   C. Flue gas has lower dew point thereby facilitating more waste heat recovery
   D. All A., B. and C.

3. Correct viscosity of furnace oil at the burner tip for proper atomisation is about 25 centistokes. To reduce the viscosity of high viscosity furnace oil (250 centistokes) to the correct atomisation viscosity (i.e. 25 cst), it should be preheated to about ______________°C?

   A. 70
   B. 85
   C. 105
   D. 145

4. Coal tar fuel – 200 (CTF 200) is a mixture of __________________?

   A. Pitch and creosote oil
   B. Light oil and pitch
   C. Anthracene and crecosote oil
   D. Solar oil and pitch

5. Preheating of ______________ the flame temperature?

   A. The gaseous fuel before combustion decreases
   B. Combustion air decreases
   C. Either the fuel or the air or both, increases
   D. Either the fuel or the air does not affect

6. Preheating of combustion air is done to ___________________?

   A. Increase the adiabatic flame temperature
   B. Increase the calorific value of the fuel
   C. Complete the combustion of fuel
   D. Reduce its requirement for effecting the complete combustion

7. Preheating of coal charge for the coke ovens reduces the __________________?

   A. Time of carbonisation
   B. Yield of gas and tar
   C. Fuel consumption in coking
   D. All A., B. and C.

8. Preheating of a gaseous fuel results in increased____________________?

   A. Flame length
   B. Flame temperature
   C. Quantity of flue gas
   D. Ignition temperature

9. Explosion limit of blast furnace gas is 37 to 71% gas in gas-air mixture. It means that the blast furnace gas will explode when burnt in a confined space, if its concentration in the gas-air mixture is _______________ percent?

   A. 71%
   C. In between 37 & 71%
   D. None of these

10. Eschka mixture, which is used for the determination of sulphur in coal, is a mixture of _____________________?

    A. MgO & Na2CO3
    B. MgSO4 & BaCl2
    C. BaSO4 & NaCl
    D. MgCO3 & NaCl