Chemical Engineering - Chemical Engineering Basics

6. 

The moment of inertia of a body comes into play in __________ motion.

A. curvilinear
B. linear
C. rotational
D. none of these

Answer: Option C

Explanation:

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7. 

Thermoplastics are never moulded using

A. injection moulding
B. blow moulding
C. extrusion
D. compression moulding

Answer: Option D

Explanation:

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8. 

Pick out the wrong statement. If the net positive suction head (NPSH) requirement of a pump is not satisfied, then

A. it will deliver low discharge of liquid.
B. its efficiency will not be affected.
C. it will not develop sufficient head to raise water.
D. it will be cavitated.

Answer: Option B

Explanation:

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9. 

While the thermosetting polymers are amorphous in nature, the thermoplastic polymers are either amorphous or crystalline. The crystalline polymers are characterised by the

A. low impact strength.
B. high flexibility.
C. better finish and surface appearance.
D. high plastic deformation.

Answer: Option A

Explanation:

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10. 

The stress at which a metal fails by fatigue lies

A. near the fracture point of the stress-strain curve.
B. in the plastic range.
C. in the elastic range.
D. none of these.

Answer: Option C

Explanation:

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