Chemical Engineering Archives

Chemical Engineering

Prepare with the best Chemical Engineering MCQs with answers and detailed explanations for exams and job tests. Our collection covers key topics such as chemical process calculations, thermodynamics, fluid mechanics, heat transfer, mass transfer, reaction engineering, instrumentation, and plant design. These Chemical Engineering multiple-choice questions are ideal for students, competitive exam aspirants, and professionals preparing for NTS, PPSC, FPSC, PEC exams, GATE, university entry tests, and job interviews. Practice online with updated Chemical Engineering MCQs to strengthen your concepts and improve technical problem-solving skills.

3051. Spalling resistance of a refractory can not be increased by

increasing its porosity.

using a coarser grog during its manufacture.

decreasing its thermal co-efficient of expansion.

making it denser.

✅ The correct answer is option D.

3052. The linear thermal expansion of __________ bricks upto 1000 °C is very low of the order of ≤ 0.5 percent.

fireclay

silica

magnesite

corundum

✅ The correct answer is option A.

3053. Faster rate of drying of moulded refractories results in high __________ of refractories.

green strength

voids

shrinkage

both (b) and (c)

✅ The correct answer is option D.

3054. Refractoriness under load (RUL) of fireclay bricks (under a load of 2 kg/cm2 ) is __________ °C.

500

1000

>1350

>2000

✅ The correct answer is option C.

3055. An indication of degree of firing in silica brick is its

specific gravity

fusion point

RUL

none of these

✅ The correct answer is option A.

3056. Lower wall courses of soaking pits are made of __________ bricks to avoid the action of molten slag & scale.

chrome or magnesite

silicon carbide

silica

lowduty fireclay

✅ The correct answer is option A.

3057. High density refractory bricks have lower

spalling resistance.

thermal conductivity.

fusion point.

slag penetration resistance.

✅ The correct answer is option A.

3058. Magnesite chrome bricks are used in the

roof lining of basic open hearth & other basic furnaces.

reheating furnaces.

soaking pits.

all (a), (b) and (c).

✅ The correct answer is option D.

3059. Magnesite bricks have poor resistance to attack by __________ slag.

lime

basic

acid

none of these

✅ The correct answer is option C.

3060. Thermal conductivity of refractory bricks

increases with decrease in porosity.

decreases with decreases in porosity.

is independent of its porosity and is maximum for insulating bricks.

increases with the amount of air entrapped in pores.

✅ The correct answer is option A.