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.Management Sciences
Category: CHEMICAL ENGINEERING
The malleability of a material is the property by virtue of which it can be rolled or hammered into thin sheets. Which of the following materials has the maximum malleability ?
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A. Lead
B. Copper
C. Aluminium
D. Wrought iron
With increase in reduced temperature, the fugacity co-efficient of a gas at constant reduced pressure___________________?
A. Increases
B. Decreases
C. Remain same
D. Decreases linearly
Beryllia (which is used in making crucibles for melting uranium & thorium) is superior to alumina in all respects for high temperature (> 1900°C ) use, except______________?
A. Cost
B. Electrical conductivity
C. Thermal conductivity
D. Fusion point
Which of the following has the highest calorific value ?
A. Lignite
B. Sub-bituminous coal
C. Anthracite
D. Peat
The term Biological Oxygen Demand (BOD) is used in relation to ______________________?
A. Potable water
B. Cooling water
C. Distilled water
D. Industrial effluents
Main boring diameter for petroleum well is 20-30 cms in diameter, while the depth of the oil well may be about _____________ kms?
A. 0.1 to 0.5
B. 1.5 to 4.5
C. 7.5 to 12.5
D. 15-20
For an ideal black body______________________?
A. Absorptivity = 1
B. Reflectivity = 1
C. Emissivity = 0
D. Transmissivity = 1
_____________________ of austenite decreases the hardenability in steel ?
A. Fine grains
B. Coarse grains
C. Homogeneity
D. Dissolved elements (except cobalt)
In the equation, PVn = constant, if the value of n is in between 1 and y (i.e. Cp/Cv), then it represents a reversible ____________ process?
A. Isometric
B. Polytropic
C. Isentropic
D. Isobaric
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