Chemical Engineering Objective Questions { Materials and Construction }

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337. Which of the following finds the least commercial use?

B. High silicon iron

C. Low carbon steel

D. High carbon steel

338. Pick out the wrong statement.

A. Tin can be readily and very easily drawn into very fine wire

B. Tin can be severely cold worked without the necessity of annealing due to its low recrystallisation temperature

C. Tin exists in two allotropic forms

D. The predominant use of tin is in the form of coating for steel & copper alloys

339. A hardened steel essentially contains

D. None of these

340. Diamagnetic materials are magnetised

B. Only slightly

C. With eddy currents only

D. In a direction opposite to that of the applied field

341. Which of the following comprises of hydrocarbons?

D. None of these

342. Specify the material of construction suitable for handling concentrated HNO₃ at 100°C.

A. High silicon iron, Kel-F and teflon

B. Tin and wood

C. Silicone rubber

D. Stainless steel

343. Which of the following is not an alloy of copper?

B. Admirability gun metal

C. German silver

D. Pewter metal

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