The main reducing agent in iron blast furnace is____________________?

Related Mcqs:

1. Basicity [%Cao + %MgO + %SiO2) of the slag in Indian blast furnace is in the range of___________________?

   A. 0.7-1.0
   B. 1.1-1.4
   C. 1.5 – 1.8
   D. 2.0 – 2.5

2. Waste/polluted water discharged from electroplating, blast furnace and coal mining industries contain mainly _____________ substances?

   A. Radioactive
   B. Organic
   C. Inorganic
   D. None of these

3. Major sources of noise in furnace operation arises from air inspirators, combustion, side wall vibrations and fluctuation in the process heat load. A 50% increase in fuel firing rate may increase the furnace noise level by about ____________ decibels?

   A. 3
   B. 30
   C. 7
   D. 70

4. Addition of small amount of ________________ to grey cast iron is done to produce nodular grey cast iron ?

   A. Manganese
   B. Phosphorous
   C. Magnesium
   D. Chromium

5. A fluid gas produced on burning furnace oil contains 0.15 gm mole of CO2, 0.05 gm mole of oxygen and 0.80 gm mole of N2. What is its molecular weight ?

   A. 28.6
   B. 30.0
   C. 30.6
   D. 32.6

6. White flue gas (resembling steam) coming out of the chimney of a thermal power plant indicates that the fuel used in the boiler furnace is_______?

   A. Tar
   B. Sulphide Coke
   C. Coke Oven Gas
   D. Pulverised coke

   Submitted by: Muhammad Mutsadiq Umer

7. Ideal refrigeration cycle is____________________?

   A. Same as Carnot cycle
   B. Same as reverse Carnot cycle
   C. Dependent on the refrigerant’s properties
   D. The least efficient of all refrigeration processes

8. The following heat engine produces power of 100,000 kW. The heat engine operates between 800 K and 300 K. It has a thermal efficiency equal to 50% of that of the Carnot engine for the same temperature. The rate at which heat is absorbed from the hot reservoir is____________________?

   A. 100,000 kW
   B. 160,000 kW
   C. 200,000 kW
   D. 320,000 kW

9. Free energy change at equilibrium is____________________?

   A. Zero
   B. Positive
   C. Negative
   D. Indeterminate

10. The value of (Cp – Cv) for a real gas obeying Vander Wall’s equation is____________________?

    A. R
    B. > R
    C. < R
    D. 0.5 R