Chemical Engineering - Chemical Engineering Basics

6. 

The refractory lining of the bottom in a basic electric arc furnace is made of

A. silica
B. alumina
C. magnesia
D. fireclay

Answer: Option C

Explanation:

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7. 

Alcohols are not suitable as diesel engine fuel because the cetane number of alcohols is

A. very low which prevents their ignition by compression.
B. very high which prevents their ignition by compression
C. zero.
D. none of these.

Answer: Option A

Explanation:

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8. 

Matte smelting is used in the extraction of

A. lead
B. zinc
C. aluminium
D. copper

Answer: Option D

Explanation:

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9. 

Percentage of differential pressure lost in a venturimeter with a tapering of 15° may be about

A. 1
B. 10
C. 25
D. 50

Answer: Option B

Explanation:

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10. 

Compressed dry air is used as the cutting fluid, while machining

A. steel
B. cast iron
C. aluminium
D. none of these

Answer: Option B

Explanation:

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