Chemical Engineering MCQs

6108 MCQs  (Page 123 of 611)

Chloramines are used in water treatment for_____________________?
A. Disinfection and control of taste & odour
B. Corrosion control
C. Removing turbidity
D. Control of bacteria
Mineral oils (e.g. petroleum oils) are preferred over fatty oils (e.g. mustard oil, ghee, tallow, palm oil, olive oil etc.) as a lubricant due to its________________?
A. Poor oxidation stability and high gum forming tendency
B. Greater tendency of decomposition at elevated temperature
C. Hydrolysis tendency in presence of water
D. All a, b. and c
Hydrogenation of oil/fat does not_________________?
A. Improve its resistance to rancid oxidation
B. Raise its melting point
C. Remove double bonds
D. None of these
Epoxy resin__________________?
A. Is a good adhesive
B. Is an elastomer
C. Cannot be used for surface coatings
D. Is a polyester
Temporary hardness of water can be removed by__________________?
A. Addition of alum (a coagulant)
B. Boiling
C. Filtration (through gravity sand filter)
D. Addition of lime
Ethyl alcohol cannot be produced_________________?
A. From waste sulphite substrate of paper mills
B. By esterification and hydrolysis of ethylene
C. From molasses
D. None of these