Chemical Engineering - Chemical Engineering Basics

36. 

Feed check valve is used in steam boilers to

A. check the water level in the boiler.
B. check the feed water flow rate.
C. feed high pressure water to boiler and guard against its backflow through it.
D. none of these.

Answer: Option C

Explanation:

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37. 

Three elastic constants for a completely anisotropic elastic material which follows the Hooke's law are young's modulus, elastic limit stress and yield stress. Which of the following properties is most sensitive to increase in strain rate ?

A. Tensile strength.
B. Elastic limit.
C. Proportional limit.
D. Yield strength.

Answer: Option C

Explanation:

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38. 

Swaging is a/an __________ operation.

A. piercing
B. forging
C. extrusion
D. drawing

Answer: Option B

Explanation:

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39. 

Pig iron is

A. made from cast iron.
B. made from wrought iron.
C. the one, which comes out of the blast furnace.
D. free from impurities.

Answer: Option C

Explanation:

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40. 

Classification of metal forming processes into hot and cold working is based on the following parameters.

A. Stacking fault energy.
B. Recrystallisation temperature.
C. Solidus temperature.
D. Transformation temperature.

Answer: Option B

Explanation:

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