Fusion of limestone and ______________ produces high alumina cement?

Related Mcqs:

1. Fusion of bauxite and ________________ produces high alumina cement?

   A. Alum
   B. Limestone
   C. Coke
   D. Quartz

2. Production of one ton of cement requires about _______________ tons of limestone ?

   A. 0.6
   B. 1.2
   C. 2.2
   D. 3.8

3. The compressive strength of cement should not be less than about 110Kg/cm2 after three days & not less than 170Kg/cm2 after seven days. The fineness of an ordinary cement as determined by turbidimetric method should be about ________________ cm2/gm?

   A. 800
   B. 1600
   C. 4000
   D. 8500

4. Calcination of limestone is not done in a ______________ kiln for producing lime ?

   A. Vertical shaft
   B. Rotary
   C. Fluidised bed
   D. Fixed bed

5. The metallic aluminium is obtained from pure alumina in the presence of fused cryolite by_________________?

   A. Electrolysis
   B. Electrolytic reduction
   C. Electrolytic oxidation
   D. None of these

6. Main constituent of limestone is____________________?

   A. CaCO3
   B. MgCO3
   C. Na2CO3
   D. CaSO4

7. Commercial production of soda ash by Solvay process requires limestone, ___________________ as raw materials?

   A. Coke and sand
   B. Brine and coal
   C. Coke and caustic soda
   D. None of these

8. Commercial production of calcium carbide requires limestone and __________________ as raw materials?

   A. Coke
   B. Sand
   C. Soda ash
   D. Fuel oil

9. Resistance to fusion of the refractory under a steady rising temperature condition is called ____________________ ?

   A. Spalling
   B. Refractoriness
   C. Both A. & B.
   D. Neither A. nor B.

10. High temperature carbonisation of coal produces _____________________ ?

    A. Inferior coke compared to low temperature carbonisation
    B. Less of gases compared to liquid products
    C. Larger quantity of tar compared to low temperature carbonisation
    D. None of these