A. 0.05 to 0.15 (Correct)
B. 0.25 to 0.50
C. 0.5 to 0.8
D. 0.8 to 0.9
Chemical Engineering / Q&A
Bacterial aerobic oxidation of polluted water in biological oxidation ponds is done to purify it. Presence of bacteria helps in____________________?
A. Coagulation and flocculation of colloids
B. Oxidation of carbonaceous matter to CO2
C. Nitrification or oxidation of ammonia derived from breakdown of nitrogenous organic matter
to the nitrite and eventually to the nitrate
D. All A., B. and C. (Correct)
If the head over the triangular notch is doubled, the discharge will increase by ______________ times?
A. 2
B. 2.828
C. 5.657 (Correct)
D. 4
Plasma is_____________________?
A. A high temperature neutral gas
B. Nothing but ionised gas (Correct)
C. A source of steady and highest controllable pressure
D. Formed at very low temperature
High aniline point of a petrofuel (say diesel) indicates that ________________?
A. It is highly aromatic in nature
B. It is highly paraffinic in nature (Correct)
C. It has a very low diesel index
D. Its ignition quality is very poor
Stoke’s law is valid, when NRe, p is less than_________________?
A. 2 (Correct)
B. 100
C. 2100
D. 700
Fireclay bricks are not used in the_________________?
A. Blast furnace
B. Hot blast stove
C. Cupola
D. Wall of coke oven (Correct)
Addition of ______________ to the steel helps in increasing the residual magnetism in steel used for making magnets?
A. Chromium
B. Nickel
C. Tungsten
D. Cobalt (Correct)
Which of the following is not an equation of state ?
A. Bertholet equation
B. Clausius-Clapeyron equation (Correct)
C. Beattie-Bridgeman equation
D. None of these
Nitrogen content of calcium ammonium nitrate (CAN) is _____________ percent?
A. 10
B. 25 (Correct)
C. 50
D. 80