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Chemical Engineering Basics

A particle is settling in a liquid under Stokesian conditions. The free falling velocity of the particle is proportional to____________________?

Chemical Engineering Basics /
A particle is settling in a liquid under Stokesian conditions. The free falling velocity of the particle is proportional to____________________?

A. √(Particle diameter)
B. Particle diameter
C. (Particle diameter)2
D. (Particle diameter)3

A particle is settling in a liquid under Stokesian conditions. The free falling velocity of the particle is proportional to____________________? Read More »

Chemical Engineering Basics

The efficiency of a Carnot heat engine operating between absolute temperatures T1 and T2 (when, T1 > T2) is given by (T1 – T2)/T1. The co-efficient of performance (CO.P.) of a Carnot heat pump operating between T1 and T2 is given by_________________?

Chemical Engineering Basics /
The efficiency of a Carnot heat engine operating between absolute temperatures T1 and T2 (when, T1 > T2) is given by (T1 – T2)/T1. The co-efficient of performance (CO.P.) of a Carnot heat pump operating between T1 and T2 is given by_________________?

A. T1/(T1-T2)
B. T2/(T1-T2)
C. T1/T2
D. T2/T1

The efficiency of a Carnot heat engine operating between absolute temperatures T1 and T2 (when, T1 > T2) is given by (T1 – T2)/T1. The co-efficient of performance (CO.P.) of a Carnot heat pump operating between T1 and T2 is given by_________________? Read More »

Chemical Engineering Basics

Blow off cock is provided in steam boiler to ____________________?

Chemical Engineering Basics /
Blow off cock is provided in steam boiler to ____________________?

A. Guard the boiler in case of abnormal rise in steam pressure
B. Drain out water and sludge during its repair
C. Regulate the supply of water in boiler
D. Put out the fire in the furnace when the water level in the boiler falls to unsafe limit

Blow off cock is provided in steam boiler to ____________________? Read More »

Chemical Engineering Basics

The most prominent single cause of corrosion in boiler-tubes, drums, economisers and steam superheaters in a thermal power plant boiler is the_______________?

Chemical Engineering Basics /
The most prominent single cause of corrosion in boiler-tubes, drums, economisers and steam superheaters in a thermal power plant boiler is the_______________?

A. Water alkalinity & leakage
B. Hydrazine addition during feed water treatment
C. Release of non-condensable gas from water in the boiler
D. Scale formation

The most prominent single cause of corrosion in boiler-tubes, drums, economisers and steam superheaters in a thermal power plant boiler is the_______________? Read More »

Chemical Engineering Basics

Sacrificial anode method is used in the protection of pipelines which are buried underground. Sacrificial anode________________?

Chemical Engineering Basics /
Sacrificial anode method is used in the protection of pipelines which are buried underground. Sacrificial anode________________?

A. Occurs higher in the electro-chemical series of metals
B. Is exemplified by magnesium plate
C. Is much cheaper than the cathodic base material to be guarded against corrosion
D. All A, B. & C.

Sacrificial anode method is used in the protection of pipelines which are buried underground. Sacrificial anode________________? Read More »

Chemical Engineering Basics

Electrolytic reduction cell used for conversion of calcined Al2O3 to Al is a carbon lined furnace operating at 800-900 °C. The purpose of electric current supplied to the furnace is to___________________?

Chemical Engineering Basics /
Electrolytic reduction cell used for conversion of calcined Al2O3 to Al is a carbon lined furnace operating at 800-900 °C. The purpose of electric current supplied to the furnace is to___________________?

A. Achieve very high purity of aluminium (99.9%)
B. Keep the electrolyte in liquid condition by the generation of heat
C. Electrolytically dissociate alumina
D. Both B. & C.

Electrolytic reduction cell used for conversion of calcined Al2O3 to Al is a carbon lined furnace operating at 800-900 °C. The purpose of electric current supplied to the furnace is to___________________? Read More »

Chemical Engineering Basics