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.

1131. Powder metallurgy is used to produce

A. High precision components with complex cavities and sharp features

B. Components of large size

C. Porosity free components

D. Components of such alloys whose constituents do not form alloys readily

✅ The correct answer is option C.

1132. For a spontaneous natural process at constant temperature and pressure, the free energy of the system always

A. Increases

B. Decreases

C. Remains constant

D. Increases to a maximum before decreasing

✅ The correct answer is option A.

1133. __________ can not be forged.

A. High speed/carbon steel

B. Cast iron

C. Wrought iron

D. Mild steel

✅ The correct answer is option B.

1134. Cold cracking in the heat affected zone of a high strength steel weld can take place because of the

A. Retained austenite

B. Martensite formation

C. Relatively high sulphur content in the base metal

D. Sufficient hydrogen present in the welding arc

✅ The correct answer is option B.

1135. Cascade control is

A. The continuous adjustment of the set point index of an automatic control loop by a primary (master) controller

B. Used when changes in process conditions cause serious upsets in the controlled variable

C. Useful to control flow from temperature

D. All of the above

✅ The correct answer is option D.

1136. Austempering process results in the formation of __________ structure.

A. Martensitic

B. Bainitic

C. Carburised

D. Stressed

✅ The correct answer is option B.

1137. __________ of austenite decreases the hardenability in steel.

A. Fine grains

B. Coarse grains

C. Homogeneity

D. Dissolved elements (except cobalt)

✅ The correct answer is option D.

1138. When the wavelength of incident X-rays increases, the angle of diffraction

A. Decreases

B. Increases

C. Remains constant

D. Shows no systematic variation

✅ The correct answer is option A.

1139. Nusselt number is related to the Reynolds number (Re) in turbulent & laminar flow respectively as

A. Re0.5, Re0.8

B. Re0.8, Re-0.5

C. Re0.8, Re0.5

D. Re-0.8, Re0.5

✅ The correct answer is option C.

1140. With increase in temperature, the surface tension of water

A. Increases

B. Decreases

C. Remains constant

D. Increases linearly

✅ The correct answer is option B.