Related Questions

Moisture contained by a substance in excess of the equilibrium moisture is called the __________ moisture.
A Unbound
B Free
C Critical
D Bound
As the equilibrium moisture content of the coal increases, its
A Calorific value increases
B Swelling number decreases
C Swelling number increases
D Bulk density decreases
Moisture content of a substance when at equilibrium with a given partial pressure of the vapour is called the __________ moisture.
A Free
B Unbound
C Equilibrium
D Bound
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
Ash content in the middling coal (a byproduct of coal washeries) in India ranges between __________ percent.
A 15 to 25
B 35 to 45
C 55 to 75
D 75
Fusion point of coal ash increases with increase in its __________ content.
A Iron sulphate
B Iron silicate
C Lime and magnesia
D All of the above
With increase in the oxygen content of the coal, its __________ decreases.
A Calorific value
B Caking power
C Both A & B
D Neither A nor B
Mineral matter content (M) and ash content (A) in coal are approximately related as
A M = 1.1A
B M = A
C M = 1.5A
D M = 2A
Increase in the moisture content in concrete
A Reduces the strength
B Increases the strength
C Does not change the strength
D All of the above
With increase in moisture content, the bulking of sand
A Increases
B Decreases
C First increases to a certain maximum value and then decreases
D First decreases to a certain minimum value and then increases

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