2564. Octane number of gasoline produced by two stage fluidised catalytic cracking process is
80
87
92
97
✅ The correct answer is option D.
2569. Atomising steam to fuel oil ratio in a burner should be around
0.5
1.5
2.5
3.5
✅ The correct answer is option A.
2499. __________ treatment is done for appreciable improvement in viscosity index of lubricating oil.
Acid
Solvent extraction
Alkali
Clay
✅ The correct answer is option B.
2504. Flue gas from the heating chamber of byproduct coke ovens is removed by
Forced draft fan
Induced draft fan
Steam ejector
Natural draft
✅ The correct answer is option D.
2509. Solvent used in the deasphalting process is
furfurol
phenol
propane
hexane
✅ The correct answer is option C.
2514. Shatter index of metallurgical coke on 2 inches and 0.5 inch screen should be respectively around __________ percent.
80 and 97
95 and 100
40 and 70
25 and 97
✅ The correct answer is option A.
2519. The colour of gasoline is an indication of its
octane number.
lead susceptibility.
gum forming tendency & thoroughness of refining.
none of these.
✅ The correct answer is option C.
2524. Use of excess of combustion air in the combustion of fuels results in
Heat losses
Long flame
Condensation of water vapour from the fuel gas
None of these
✅ The correct answer is option A.
2529. Which of the following is the most suitable feed for platforming process (reforming) ?
Olefinic hydrocarbon
Naphtha
Fuel oil
Atmospheric residue
✅ The correct answer is option A.
2460. For __________ Prandtl number values, the heat conduction will be negligible in the buffer zone.
Extremely low
Low
High
No
✅ The correct answer is option C.