421. The co-ordination number in simple cubic structure is
A. 4
B. 6
C. 8
D. 12
✅ The correct answer is option B.
Basic Chemical Engineering MCQs
Practice Basic Chemical Engineering MCQs with answers and explanations to prepare for exams, interviews, and job tests. Our question bank covers fundamental topics such as units and dimensions, material and energy balances, fluid mechanics, thermodynamics, heat transfer, mass transfer, and chemical process basics. These multiple-choice questions are designed for students, fresh graduates, and competitive exam aspirants preparing for NTS, PPSC, FPSC, PEC exams, GATE, university entry tests, and recruitment assessments. Strengthen your core concepts and problem-solving skills with our updated Basic Chemical Engineering MCQs.
422. __________ wire is never used for making the heating element.
A. Nichrome
B. Kanthal
C. Invar
D. None of these
✅ The correct answer is option C.
423. In electrical resistance welding, distortion results from the use of improper
A. Clamping methods
B. Electrodes
C. Current
D. Filler material
✅ The correct answer is option A.
424. Babbit lining is used on brass/bronze bearings to increase the
A. Antifriction properties
B. Compressive strength
C. Bearing resistance
D. Wear resistance
✅ The correct answer is option D.
425. Prandtl mixing length in turbulent flow signifies the
A. Average distance perpendicular to the mean flow covered by the mixing particles
B. Wavelength corresponding to the lowest frequency present in the flow field
C. Ratio of mean free path to characteristic length of the flow field
D. Magnitude of turbulent kinetic energy
✅ The correct answer is option A.
426. Oxide layer formed on the non-ferrous metal surface after its annealing is
A. Removed by acid pickling
B. Hammered into the surface
C. Removed with coarse emery cloth
D. Left as such to protect the surface
✅ The correct answer is option A.
427. Which of the following is not an ore of zinc?
A. Cerrusite
B. Franklinite
C. Calamine
D. Troosite
✅ The correct answer is option A.
428. An ingot is hot forged to a 60% reduction in cross-section area. The percentage reduction in the volume for the above process is
A. 0
B. 60
C. 30
D. 20
✅ The correct answer is option A.
429. Maximum heat dissipation occurs from a steel wire (k = 0.5 W/m. k) of 15 mm diameter exposed to air (h = 20W/m² .k), when the insulation thickness is __________ mm.
A. 15
B. 25
C. 10
D. 30
✅ The correct answer is option B.
430. Addition of __________ in steel can help in increasing the depth of hardness.
A. Nickel
B. Chromium
C. Vanadium
D. Tungsten
✅ The correct answer is option C.