Categorisation of Coal, UHV, GCV,Grades of Coal etc.

Q1.Which Nomenclature is used for grading of non-coking coal ?
(a) Alphabetical (b) Numerical (c) Apha-Numeric (d) Roman
Q2.What is the basis for grading of Non-coking coal ?
(a) Ash (b) Moisture (c) Calorific Value (d) All of the above
Q3.Which is the methodology for gradation of Non-coking coal ?
(a) UHV (b) GCV (c) Both (d) None
Q4.Calorific value of coal means ?
(a) Burning power of coal (b) Heating power of coal
(b) Heat evolved by burning 1Kg coal (d) None of the above.
Q5.UHV stands for …………
(a) Ultimate Heat Value (b) Useful Heat Value
(c) Uniform Heat Value (d) Unilateral Heat Value
Q6.The Empirical formula to derive UHV is ?
(a) 8,900-138x(A+M)
(b) 9,200-138x(M+A)
(c) 8,900-140(A+M)
(d) 7,70,-139(A+M)
Q7.What is the disadvantage of UHV based coal gradation ?
(a) Very easy to derive
(b) It is not correct
(c) It is formula based & not give correct value
(d) All of the above
Q8. Which of the following is the descending order of gradation of Non-coking coal ?
(a) A,B,C,D,E (b) C,D,E,B,A (c) E,D,C,B,A (d) E,D,C,B,A
Q9.GCV stands for …………
(a) Gross Calorific Value
(b) Grim Calorific Value
(c) Graceful Calorific Value
(d) Great Calorific Value.
Q10.What is the advantage of GCV based coal gradation ?.
(a) It is very cumbersome
(b) It is very simple
(c) It does not require a lab
(d) It is more correct
Q11.What does long flame coal indicate ?
(a) It has long flame on burning (b) It has bright flame on burning (c) It gives more heat (d) It has
more volatile matter
Q12.The permissible limit of ash in washed coal as per MoEF guidelines is…………
(a) Less than or equal to 34% (b) Less than 38% (c) Less than 40% (d) Less than 45%
Q13.The ash content(%age) is ….................... in higher quality coal.
(a) more (b) less (c) constant (d) variable
Q14.What is the unit in which heat value of coal is expressed ?
(a) K,Cal/Kg (b) Cal/Kg (c) Kcal/te (d) Cal/te
Q15.What is a Bomb Calorimeter?
(a) An instrument to detect a bomb
(b) An instrument to measure heat value
(c) A musical instrument
(d) A gas instrument
……………………………………………………………………………………….…………..……………
A N S W E R
01(a), 02.(c), 03(c), 04(b), 05(b), 06(a), 07(c), 08(a), 09(a), 10(c), 11(d), 12(a), 13(b), 14(a), 15(b).

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