3534. 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.
3539. Volatile matter content of metallurgical coke may be around __________ percent.
1-Feb
Oct-15
22-26
30-33
✅ The correct answer is option A.
3545. The calorific value of natural gas is about __________ kcal/Nm³.
10, 000
2500
25, 000
35, 000
✅ The correct answer is option A.
3551. 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.
3555. 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.
3521. Catalyst used in Fischer-Tropsch process is
Nickel
Zinc oxide
Alumina
Thorium oxide
✅ The correct answer is option A.
3529. Nitro-phosphate (manufactured at Trom-bay) is a __________ fertiliser.
Mixed
Complex
Highly hygroscopic
Highly explosive
✅ The correct answer is option B.
3531. Ammonium sulphate can be produced by reacting gypsum with
Ammonia
Ammonium carbonate
Nitric acid
None of these
✅ The correct answer is option B.
3536. Both white phosphorous as well as red phosphorous
Are soluble in CS₂
Burns when heated in air
Reacts with hot caustic soda solution to give phosphine
All of the above
✅ The correct answer is option B.
3541. The most suitable fertiliser for accelerating seeding or fruit formation in later stages of plant growth is __________ fertiliser.
Nitrogenous
Phosphatic
Potassic
None of these
✅ The correct answer is option B.