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.Management Sciences
Category: Chemical Engineering Basics
Tempering of a material does not improve its____________________?
A. Machinability
B. Toughness
C. Internal stress level
D. Softness
Cobalt – 60 is used as a source of _____________ in medical therapy & industrial radiography?
A. X-rays
B. γ-rays
C. α-rays
D. β-rays
For a thermodynamic system undergoing a process, which of the following pairs best expresses the relationship similar to that expressed by the pressure volume plot ?
A. Temperature – entropy
B. Temperature – pressure
C. Enthalpy – entropy
D. Enthalpy-pressure
Which of the following is an ore dressing operation ?
A. Classification
B. Smelting
C. Roasting
D. None of these
The product of a commercial direct reduction process is___________________?
A. Liquid iron
B. Solid iron
C. Sponge iron
D. Iron saturated with carbon
Batch process is preferred over continuous process, when the___________________?
A. Product yields and quality cannot be achieved in continuous process, because of long
residence time
B. Sales demand of product is not steady
C. Same equipment cannot be used for several processes of the same nature
D. All (A), B. & (C)
Which of the following parameters is not responsible for the heat loss from a hot steam carrying bare pipe surface located in a room without fans ?
A. Emissivity of pipe surface
B. Diameter & length of the pipe
C. Temperature of hot pipe surface & that of air in the room
D. None of these
Diffusion co-efficient of a metal in a solid solution depends upon its ?
A. Composition
B. Temperature
C. Both A. & B.
D. Neither A. nor B.
Thermal equivalent of electrical power in practical calculation is _______________ kcal/kWh ?
A. 746
B. 3000
C. 1000
D. 550
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