Insufficient supply of combustion air and insufficient time for combustion
Poor quality of fuel and improper mixing of fuel & combustion air
Poor design & overloading of furnace
All of the above
✅ The correct answer is option D.
Chemical Engineering MCQs
Noise level audible to audience sitting in the 5th row from the stage during a large orchestra show corresponds to about __________ decibels.
105
135
160
185
✅ The correct answer is option B.
Presence of soluble organics in polluted water causes
Undesirable plants growth
Depletion of oxygen
Fire hazards
Explosion hazards
✅ The correct answer is option B.
Noise level inside a jet air liner in normal flight is about __________ decibels.
80
100
125
145
✅ The correct answer is option B.
Solid content in most of the domestic sewage is about __________ percent.
0.001
0.1
5
10
✅ The correct answer is option B.
Contact process of sulphuric acid manufacture
Yields acid of higher concentration than chamber process
Yields acids of lower concentration than chamber process
Is obsolete
Eliminates absorber
✅ The correct answer is option A.
Presence of __________ bacteria in water causes disease like typhoid.
Aerobic
Pathogenic
Anaerobic
Non-pathogenic
✅ The correct answer is option B.
Workers working in __________ industry are most prone to white lung cancer.
Coal mining
Limestone mining
Textile
Asbestos
✅ The correct answer is option C.
Rotary kiln is not involved in the production of
Cement
Lime from limestone
Slaked lime from quick lime
None of these
✅ The correct answer is option C.
If carbon monoxide content in atmospheric air exceeds __________ ppm, death is bound to occur.
50
500
1000
3000 (i.e. 0.3%)
✅ The correct answer is option D.