Atomising steam to fuel oil ratio in a burner should be around__________________?

Related Mcqs:

1. Bunsen burner is an example of a/an _____________ burner?

   A. Inside mixing/premix type
   B. Outside mixing/diffusion flame/nozzle mix type
   C. Rotary cup
   D. Submerged combustion

2. 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

3. 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

4. Turndown ratio of a gas burner is equal to the __________________ ?

   A. Maximum to minimum heat input ratio
   B. Maximum to minimum permissible gas flow rate
   C. Both A. & B.
   D. Minimum to maximum heat input ratio

5. 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

6. Caking index of the coal blend used for the manufacture of metallurgical coke should be around__________________?

   A. 5
   B. 21
   C. 40
   D. 48

7. Percentage of nitrogen in blast furnace gas may be around__________________?

   A. 5
   B. 25
   C. 55
   D. 80

8. The main function of primary air in pulverised coal fired burner is to_________________?

   A. Burn CO to CO2
   B. Dry and transport the coal
   C. Have proper combustion by supplying it around the burner
   D. Preheat the tertiary air used for complete combustion of CO to CO2

9. Temperature of preheated air used for the transportation of pulverised coal through pipes to the burner of a boiler furnace is restricted to a maximum limit of about 300° C to avoid the___________________?

   A. Requirement of large volume combustion chamber
   B. Risk of explosion
   C. Chances of clinker formation
   D. Incomplete combustion of coal

10. 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 rate
    D. Minimise the chances of clinker formation