A refractory wall separating the stock and the source of heat is provided in a__________________?

Related Mcqs:

1. In a furnace, the heat taken by the charge/stock and the heat lost to the furnace structure & flue gases depends on the__________________?

   A. Rate of firing and emissivity of flame
   B. Thermal conductivity of the charge & structural materials of furnace
   C. Nature of process; whether batch, continuous or intermittent
   D. All A., B. and C.

2. In a heating process, a heat flow diagram in which the quantities of heat in the various items of a heat balance are represented by the width of a band is called the__________________?

   A. Ostwald chart
   B. Cox chart
   C. Sankey diagram
   D. None of these

3. Ceramic coating material for furnace refractory, which increases its emissivity and thus the radiation heat transfer rate in the furnace, comprises of_________________?

   A. Graphite powder
   B. Thoria
   C. Zircon powder
   D. Beryllium

4. Reducing atmosphere is maintained in a__________________?

   A. Calcination kiln
   B. Blast furnace
   C. Soaking pit
   D. L.D. converter

5. Heat transfer rate to the stock/charge in the furnace does not depend upon the________________?

   A. Emissivity of the refractory walls
   B. Size of the furnace
   C. Use of waste heat recovery equipments
   D. Thickness of the stock

6. Heat transfer rate to the charge/stock in a furnace does not depend upon the________________?

   A. Type of fuels viz. solid, liquid or gaseous
   B. Flue gas temperature
   C. Emissivity of refractory walls
   D. Initial temperature of the charged stock

7. Rate of heat release in a furnace, which is the measure of heat intensity, is defined as_________________?

   A. kcal/hr/m3 combustion space
   B. kcal/m3 combustion space
   C. kcal/hr
   D. None of these

8. Design of waste heat boiler for recovery of waste heat from furnace gases depends upon the_________________?

   A. Quantity & temperature of waste gas
   B. Dust concentration & nature of dust in waste gas
   C. Corrosive nature of the waste gas
   D. All A., B. and C.

9. Large tonnage of refractory bricks are dried in a_____________________?

   A. Shaft furnace
   B. Rotary hearth furnace
   C. Tunnel kiln
   D. Muffle furnace

10. Thickness of stock does not affect the fuel economy of furnaces, if the material to be heated is of__________________?

    A. Low emissivity
    B. High thermal conductivity
    C. Both A. and B.
    D. Neither A. nor B.