Chemical Engineering - Chemical Engineering Basics

1. 

Maraging steels derive their strength from the following mechanism:

A. A fine, highly dislocated and strong martensite.
B. Fine dispersions of intermetallics of Fe, Ni, Ti etc.
C. Fine dispersions of alloy carbides in a ferrite matrix.
D. Fine dispersions of Fe3 C nucleated on dislocations in austenite.

Answer: Option A

Explanation:

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2. 

Ceramic compounds as compared to metallic compounds

A. crystallise faster.
B. resist greater tensile stress at room temperature.
C. have higher melting temperature.
D. are better conductor of electricity at higher temperature.

Answer: Option C

Explanation:

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3. 

Pressure exerted by a liquid depends upon its

A. surface tension
B. density
C. viscosity
D. buoyancy

Answer: Option B

Explanation:

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4. 

The most detrimental impurity in high pressure boiler feed water is

A. suspended salt
B. dissolved salt
C. silica
D. turbidity

Answer: Option C

Explanation:

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5. 

Pick out the wrong statement.

A. A soft magnetic material should have high permeability and small area of hysterisis loop.
B. Poisson's ratio of high melting point metals is more than unity.
C. Solders generally melt at less than 185°C.
D. Steel produced by B.O.F process is ideally suited for manufacturing flat product.

Answer: Option B

Explanation:

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