Question 31 : A good quality coal should have
1. high ash content
2. high sulphur
3. low fusion point of ash
4. none of the mentioned
View Answer   Discuss with Members

Question 32 : Which of the following mode is not used to liquefy coal?
1. hydrogenation
2. catalytic conversion
3. hydro pyrolysis
4. coal gasification
View Answer   Discuss with Members

Question 33 : If M and A represent the percentages of moisture and ash respectively, the dry and ash free analysis in Ultimate Analysis is obtained on dividing other components by the fraction of
1. {1-(M+A)}/100
2. {1-(M-A)}/100
3. {1-(A-M)}/100
4. 1-{(M+A)/100}
View Answer   Discuss with Members

Question 34 : Production of producer gas from coke requires _____________ moles of nitrogen.
1. 3.76
2. 4.51
3. 2.23
4. 3.49
View Answer   Discuss with Members

Question 35 : Which of the following is not directly determined in the Proximate Analysis of coal?
1. Volatile Matter
2. Fixed Carbon
3. Moisture
4. Ash
View Answer   Discuss with Members

Question 36 : 'Fat coal' means a coal having
1. high volatile matter
2. low ash content
3. low calorific value
4. non-smoking tendency
View Answer   Discuss with Members

Question 37 : The internal energy of products minus the internal energy of reactants for complete combustion at specific temperature & pressure gives the internal energy of?
1. combustion
2. partial combustion
3. complete combustion
4. none of the mentioned
View Answer   Discuss with Members

Question 38 : In a furnace employing forced draught compared to induced draught
1. the fan operates hot and hence blades are liable to corrosion and erosion
2. positive pressure exists in the furnace
3. air is sucked in, so air leaks are more and hence furnace efficiency is reduced
4. none of the mentioned
View Answer   Discuss with Members

Question 39 : The bulk of hydrocarbon belongs to which group?
1. paraffin
2. isoparaffin
3. cycloparaffin
4. aromatic
View Answer   Discuss with Members

Question 40 : The extent of caking in coal is determined using
1. swelling index
2. grindability
3. weatherability
4. heating value
View Answer   Discuss with Members