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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

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Chemical Engineering MCQs designed for job test and interview preparation, particularly for fresh graduates, students, and candidates appearing in competitive exams. These multiple-choice questions cover important topics such as the fundamentals of chemical engineering, chemical processes, chemical reactions, process control, and instrumentation, along with other key concepts in the field.

All Topics  9594

Maximum alumina content in high alumina refractory can be as high as ____________ percent?
A 30
B 50
C 70
D 90
Correct Answer: 90
Water content in ground refractory material to be shaped into bricks by hand moulding is about _____________ percent?
A 5
B 20
C 40
D 55
Correct Answer: 20
Beryllia (which is used in making crucibles for melting uranium & thorium) is superior to alumina in all respects for high temperature (> 1900°C ) use, except______________?
A Cost
B Electrical conductivity
C Thermal conductivity
D Fusion point
Correct Answer: Cost
Refractory bricks with lower permeability is produced by using _________________?
A Higher firing temperature
B Higher moulding pressure
C Finer grog size
D All A., B. and C.
Correct Answer: All A., B. and C.
Refractories subjected to alternate cycles of heating & cooling are liable to loose their resistance to__________________?
A Thermal spalling
B Slag attack
C Fusion under load
D CO attack
Correct Answer: Thermal spalling
Addition of zircon to silica refractory brick improves its_________________?
A Crushing strength
B Resistance to slag attack
C Both A. and B.
D Neither A. nor B.
Correct Answer: Resistance to slag attack
Pick out the wrong statement?
A Atomic heat capacities of the crystalline solid elements are nearly constant and equal to 6.2 kcal/kg-atom according to the law of Petit and Dulong
B Atomic heat capacities of all solid elements decrease greatly with decrease in temperature, approaching a value of zero at absolute zero temperature, when in the crystalline state
C Generally, the heat capacities of compounds are lower in the liquid than in the solid state
D The heat capacity of a heterogeneous mixture is an additive property, but when solutions are formed, this additive property may no longer exist
Correct Answer: Generally, the heat capacities of compounds are lower in the liquid than in the solid state
Pick out the correct conversion?
A 1 BTU =453.6 calories
B 1 BTU = 252 calories
C 1 calorie = 252 BTU
D 1 calorie = 453.6 BTU
Correct Answer: 1 BTU = 252 calories
Pick out the wrong statement?
A Insulating refractories used in place of regular refractory bricks are usually called light weight refractories, and they have similar composition as heavy bricks
B Graphite refractories are also called plumbago refractories
C Superduty fireclay bricks correspond to a pyrometric cone equivalent of 26-28
D Calcined magnesite is also called dead burnt magnesite
Correct Answer: Superduty fireclay bricks correspond to a pyrometric cone equivalent of 26-28
Pick out the wrong statement?
A Refractories used in muffle furnace should have low thermal conductivity
B The electrical resistivity of refractories drops rapidly with rise in temperature
C For reducing spalling tendency, the refractory should be well fired and its porosity should be more
D Refractoriness under load (RUL) of a refractory is always less than its refractoriness
Correct Answer: Refractories used in muffle furnace should have low thermal conductivity
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