chemical engineering MCQs – Page 289

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 Review each marked answer and report any item that may be outdated or unclear.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
5761. Coke oven gas compared to blast furnace gas is________________?
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A. More explosive and inflammable

B. All A., B. and C.

C. Less poisonous

D. Lighter

5762. ____________ process is meant for direct hydrogenation of coal to produce liquid fuel?
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A. None of these

B. Lurgi

C. Bergius

D. Fischer-Tropsch

5763. Ignition temperature of a fuel in air is ______________ that in pure oxygen?
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A. More than

B. Equal to

C. Less than

D. Either more or less; depends on the type of fuel

5764. Fireclay bricks are never used in the______________?
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A. Beehive oven

B. Zinc roaster

C. Coke oven walls

D. Lead blast furnace

5765. Which of the following is not a micro component present in coal ?
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A. Clarain

B. Micrinite

C. Fusinite

D. Liptinite

5766. The pyrogallol solution used in Orsat apparatus can absorb_________________?
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A. Only O2

B. Both O2 and CO2

C. Both O2 and CO

D. All CO, CO2, and O2

5767. Which is the most stable crystalline form of silica at room temperature ?
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A. Tridymite

B. Cristobalite

C. Quartz

D. None of these

5768. In chemical process equipments, the conical bottom heads used, usually has an apex angle of____________________?
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A. 40

B. 80

C. 20

D. 60
5769. Which of the following has the lowest electrical resistivity ?
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A. Graphite

B. Alumina

C. Fireclay

D. Zircon

5770. Bauxite calcining rotary kilns are lined with ________________ bricks?
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A. Carbon

B. Corundum

C. Fireclay

D. 85% alumina
5771. High thermal conductivity of a refractory material is not important, when it is to be used in the______________________?
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A. Coke oven regenerators

B. Blast furnace

C. Recuperators

D. Muffle furnace

5772. Pyrometric cone equivalent (PCE) value (Segar cone) of Superduty refractories is more than 33 which corresponds to a temperature of _____________ C?
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A. 1670

B. 1520

C. 1630

D. 1730
5773. Grog__________________?
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A. Contains both alumina and silica

B. Is crushed firebrick

C. Is a non-plastic material

D. All A., B. and C.
5774. Naphthalene is used for making_________________?
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A. Insecticides (e.g. moth balls)

B. Drug intermediates e.g. ?-naphthol

C. All A., B. and C.

D. Unsaturated polyesters

5775. Silica bricks are attacked by basic slags at high temperature. Which of the following is not used solely as a binding material ?
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A. Water

B. Plaster of Paris

C. Aluminium phosphate

D. Lime

5776. Carbon refractories have very high __________________?
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A. Wetting characteristics

B. Refractoriness

C. Thermal conductivity

D. Both B. and C.
5777. Which is the stable form of silica upto 1470C ?
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A. Tridymite

B. None of these

C. Cristobalite

D. Quartz

5778. Chemically, mullite refractories is____________________?
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A. ThO2

B. Al2O3

C. 3Al2O3.2SiO2

D. ZrSO4

5779. Which of the following does not occur during firing/burning of refractories ?
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A. Vitrification

B. Development of stable mineral form

C. Decrease in crushing strength

D. Removal of water of hydration

5780. If oxygen content in the flue gas rises too high, fuel is being wasted by _______________?
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A. Moisture loss

B. Dry gas/stack gas loss

C. None of these

D. Incomplete combustion