Chemical Engineering - Chemical Engineering Basics

6. 

The emf of a Deniell cell can be increased by

A. decreasing the surface area of the electrodes.
B. increasing the concentration of zinc sulphate solution.
C. increasing the surface area of the electrodes.
D. increasing the concentration of copper sulphate solution.

Answer: Option D

Explanation:

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7. 

A hot short metal is

A. hard when hot.
B. brittle when cold.
C. brittle when hot.
D. brittle under all conditions.

Answer: Option C

Explanation:

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8. 

Corrosion rate can not be lowered by reducing the __________ of the corroding medium.

A. concentration
B. velocity
C. temperature
D. none of these

Answer: Option A

Explanation:

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9. 

Routing in production, planning & control is concerned with the

A. sequence of operation to be performed.
B. progress of work performed.
C. authorisation of work to be performed.
D. balancing of load on machines.

Answer: Option A

Explanation:

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10. 

A fire tube boiler is limited to a maximum steam pressure of about __________ kg/cm2.

A. 6
B. 18
C. 38
D. 52

Answer: Option B

Explanation:

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