461. The calorific value of producer gas is around __________ kcal/Nm³
1300
500
4500
9000
✅ The correct answer is option A.
Fuel and Combustion MCQs
462. ‘Wobbe index’ is a characteristic of
Solid fuels
Gaseous fuels
Liquid fuels
Fat coals
✅ The correct answer is option B.
463. Gray King Assay and Swelling Index of a coal is a measure of its
Swelling characteristics
Abradability
Agglutinating properties
Resistance to impact breakage
✅ The correct answer is option A.
464. Volatile matter content of metallurgical coke may be around __________ percent.
1-Feb
Oct-15
22-26
30-33
✅ The correct answer is option A.
465. The calorific value of natural gas is about __________ kcal/Nm³.
10, 000
2500
25, 000
35, 000
✅ The correct answer is option A.
466. Dry air requirement for burning 1 Nm³ of CO to CO₂ may be around __________ Nm³.
2.4
1.75
0.87
11.4
✅ The correct answer is option A.
467. Coke oven gas is stripped of its H₂S and mercaptans content by
Absorption in wash oil
Adsorption on bog iron bed
Bubbling it through dilute sulphuric acid
Adsorption on silica gel
✅ The correct answer is option B.
468. Catalyst used in Fischer-Tropsch process is
Nickel
Zinc oxide
Alumina
Thorium oxide
✅ The correct answer is option A.
469. Caking index of a coal is a measure of its
Abradability
Reactivity
Agglutinating (binding) properties
Porosity
✅ The correct answer is option C.
470. The calorific value of ‘LPG’ (50% propane + 50% butane) is about __________ kcal/Nm³.
5000
25, 000
10, 000
15, 000
✅ The correct answer is option B.