chemical engineering MCQs – Page 375

Practise multiple-choice questions from chemical engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering Mcqs
7481. Reverberatory furnace is used for_____________________?
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A. Annealing steel coil

B. Heating air

C. Roasting/reduction of ores

D. Steel melting

7482. Duralumin is an alloy of_________________?
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A. Aluminium, copper and manganese

B. Aluminium and nickel

C. None of these

D. Aluminium, nickel and silicon

7483. Furnace pressure is normally controlled by regulating the__________________?
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A. Damper

B. Speed of I.D. fan

C. Fuel gas pressure

D. Air pressure

7484. Thermal efficiency of furnaces can be improved by____________________?
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A. Maintaining proper draught

B. Minimising heat losses from furnace walls

C. Waste heat recovery from flue gas

D. All A., B. and C.
7485. Which of the following materials may prove unsuitable for handling acetic acid (glacial & anhydrous) at 40C ?
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A. Silicone rubber, teflon, porcelain and wood

B. Brass, cast iron, mild steel and tin

C. Nickel, monel, stainless steel and graphite

D. Aluminium, copper, high silicon iron

7486. Pick out the wrong statement ?
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A. Tin exists in two allotropic forms

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

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

D. Tin can be readily and very easily drawn into very fine wire
7487. Pick out the wrong statement ?
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A. Alloys are harder than their component elements

B. Nichrome, a steel alloyed with 10% Ni and 20% Cr can be used upto a temperature of 1100C

C. Karbate is an acid resistant material of construction

D. Presence of silicon in steel decreases its electrical resistance
7488. Mild steel is used for making___________________?
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A. Drop forging

B. Die block

C. Channels

D. Fish plates

7489. Regenerators are installed in_______________?
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A. Coke ovens

B. Open hearth furnace

C. Both A. & B.

D. Neither A. nor B.

7490. Carbon percentage in medium carbon steel is around__________________?
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A. 0.8 to 1.4

B. 0.1 to 0.35

C. 0.35 to 0.5

D. 1 to 1. 5

7491. Coke oven regenerators are made of ______________ bricks?
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A. Low thermal conductivity

B. High electrical conductivity

C. Silica

D. Fire clay
7492. Which of the following is a periodic furnace ?
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A. Rotary kiln

B. Soaking pit

C. Reheating furnace

D. Tunnel kiln

7493. Means for giving direction to the circulation of gases in furnaces are_____________________?
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A. Location of outlet ports and heating & combustion devices

B. All A., B. and C.

C. Arrangement of heating stock in the furnaces

D. Fans

7494. Which of the following crystal structures characterises the austenitic stainless steel ?
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A. Simple hexagonal

B. Face centred cubic

C. None of these

D. Body centred cubic

7495. In producer gas making furnace, steam is added along with air to mainly control the____________________?
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A. Temperature of producer gas

B. C. V. of producer gas

C. Tar content in producer gas

D. Fusion of coal ash & clinker formation
7496. An example of shaft furnace is the__________________?
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A. L.D. converter

B. Blast furnace

C. Glass melting tank

D. Soaking pit

7497. Artificial draught produced by a fan in the furnace can be controlled by the___________________?
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A. Damper

B. Variation in the pitch of fan blades

C. Speed of the fan

D. All A., B. and C.
7498. Pot furnace which is either regenerative or recuperative, is used in the manufacture of____________________?
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A. Stainless steel

B. Potteries

C. Refractory bricks

D. Glass
7499. Dielectric strength of a material is____________________?
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A. A magnetic property

B. Its energy storage capacity

C. Its capacity to resist the flow of current

D. Its capacity to withstand high voltage
7500. Which is the most thermally efficient furnace _______________________?
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A. Boiler furnace

B. Reheating furnace

C. Rotary kilns

D. Reverberatory furnace