Safe condition for storage of high V.M. bituminous coal is that ___________________?

Related Mcqs:

1. Improper storage condition results in the weathering of coal and spontaneous combustion, which increases its_________________?

   A. Caking index
   B. Yield of carbonised products
   C. Friability & oxygen content
   D. Calorific value

2. Which of the following petrological constitutes is responsible for bright and lustrous black band of bituminous coal ?

   A. Vitrain
   B. Clarain
   C. Durain
   D. Fussain

3. Calorific value of bituminous coal may be around ______________ Kcal/kg?

   A. 500
   B. 1500
   C. 6500
   D. 20000

4. Calorific value of coal middling generated in coal washeries during washing of coal may be around _____________ Kcal/kg?

   A. 1000
   B. 4000
   C. 6000
   D. 8000

5. ‘Fat’ coal means a coal having ___________________?

   A. Low calorific value
   B. High volatile matter
   C. Low ash content
   D. Non smoking tendency

6. (64-132) rank coal (ASTM) means a coal with 64%___________________?

   A. Fixed carbon and having a heat value of 13, 200 BTU/1b
   B. Ash and a heating value of 13, 200 BTU/1b
   C. Fixed carbon and a heating value of 132 BTU/1b
   D. None of these

7. 64-132) rank coal (ASTM) means a coal with 64%___________________?

   A. Fixed carbon and having a heating value around 13, 200 BTU/1b
   B. Ash and heating value around 13, 200 BTU/1b
   C. Fixed carbon and heating value around 132 BTU/1b
   D. None of these

8. A coal having high ratio of volatile matter to fixed carbon as compared to a coal having low ratio of volatile matter to fixed carbon _________________?

   A. Is less liable to spontaneous combustion on storage
   B. Is more difficult to ignite and produces a shorter flame
   C. Requires smaller combustion space and less secondary air
   D. None of these

9. A coal containing very high percentage of durain is called ______________ coal?

   A. Bright
   B. Splint
   C. Non-banded
   D. Boghead

10. Bituminous coal___________________?

    A. Ignites less easily than anthracite
    B. Is generally coking
    C. Burns with smoky yellow flame
    D. Both B. and C.