Chemical Engineering - Chemical Engineering Basics

1. 

The function of neutral flux used in the pyrometallurgy of metal extraction is to increase the __________ of the slag.

A. fluidity
B. basicity
C. acidity
D. viscosity

Answer: Option A

Explanation:

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2. 

The thermodynamic law, PVy = constant, is not followed by the

A. free expansion of an ideal gas.
B. adiabatic expansion of steam in turbine.
C. adiabatic compression of air.
D. ideal compression of air.

Answer: Option A

Explanation:

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3. 

Pick out the wrong statement about the machinability of metals. Machinability of a metal

A. decreases with increase in strain hardening tendencies.
B. decreases with increase in hardness, in general.
C. depends on the composition, microstructure and physical & mechanical properties.
D. decreases with increases in tensile strength & decrease in grain size.

Answer: Option D

Explanation:

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4. 

The refrigerant freon-12 is chemically

A. CCl2F2
B. CCl3F
C. CClF3
D. CCl4F

Answer: Option A

Explanation:

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5. 

Which of the following phenomenon will exhibit the minimum heat transfer?

A. Boiling.
B. Forced convection in air.
C. Free convection in air.
D. Conduction in air.

Answer: Option D

Explanation:

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