Chemical Engineering - Chemical Engineering Basics

1. 

Pick out the wrong statement:

A. Soft water is more corrosive than that carrying calcium salts.
B. The corrosion of brass condenser tubes handling brine solution is also termed as 'dezincification'.
C. Non-annealed brass is highly susceptible to season cracking (i.e., inter-crystal corrosion due to internal stresses).
D. Pure copper is highly susceptible to stress corrosion.

Answer: Option D

Explanation:

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2. 

The tensile strength of plastics ranges from __________ kg/mm2.

A. 10 to 50
B. 50 to 100
C. 0.01 to 0.1
D. 0.1 to 10

Answer: Option D

Explanation:

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3. 

Ceramic tips for the cutting tool are prepared from __________ powder.

A. carbon
B. silicon carbide
C. aluminium oxide
D. tungsten

Answer: Option C

Explanation:

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4. 

Grain hardness is measured by the __________ hardness testing method.

A. Knoop
B. Rockwell F
C. Shore sceleroscope
D. Vicker's

Answer: Option A

Explanation:

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5. 

The thermal efficiency of a heat engine giving an output of 4 KW with an input of 10000 Joules/sec is __________ percent.

A. 40
B. 80
C. 10
D. 25

Answer: Option A

Explanation:

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