Chemical Engineering - Chemical Engineering Basics

41. 

High __________ of cast iron makes it suitable for use in machine beds.

A. compressive strength
B. endurance strength
C. damping capacity
D. tensile strength

Answer: Option A

Explanation:

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42. 

Which of the following alloying elements reduces the formation of iron sulphide in steel ?

A. Cobalt
B. Nickel
C. Manganese
D. Vanadium

Answer: Option B

Explanation:

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43. 

In age-hardenable alloys, maximum ductility is obtained

A. in as cast state.
B. immediately after solution treatment and subsequent quenching.
C. after optimum ageing.
D. after overageing.

Answer: Option C

Explanation:

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44. 

Prandtl mixing length in turbulent flow signifies the

A. average distance perpendicular to the mean flow covered by the mixing particles.
B. wavelength corresponding to the lowest frequency present in the flow field.
C. ratio of mean free path to characteristic length of the flow field.
D. magnitude of turbulent kinetic energy.

Answer: Option A

Explanation:

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45. 

Magnesium addition to cast iron increases its

A. corrosion resistance.
B. creep strength.
C. ductility and strength in tension.
D. hardness.

Answer: Option C

Explanation:

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