A. Number of electrons
B. Oxidation number
C. Number of ions
D. All of the above
✅ The correct answer is option A.
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.
812. __________ can replace tungsten in high speed steel.
A. Chromium
B. Vanadium
C. Cobalt
D. Molybdenum
✅ The correct answer is option D.
813. Materials having __________ lattice structure are usually the most ductile.
A. Body centred cubic (bcc)
B. Hexagonal close packed (hcp)
C. Face centred cubic (fcc)
D. None of these
✅ The correct answer is option C.
814. The cooling rate required to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours is __________ BTU/hr.
A. 100
B. 200
C. 1000
D. 2000
✅ The correct answer is option B.
815. __________ of air does not increase with increase in temperature.
A. Density
B. Thermal diffusivity
C. Viscosity
D. Thermal conductivity
✅ The correct answer is option A.
816. During brazing, if the fluxes are entrapped, it results in the
A. Distortion of brazed joints
B. Cracking of joints
C. Presence of gas pockets
D. Corrosion
✅ The correct answer is option D.
817. The burnout heat flux in the nucleate boiling regime is not a function of the
A. Liquid density
B. Vapour density
C. Temperature difference
D. Heat of evaporation
✅ The correct answer is option B.
818. Pipelines carrying various utilities in chemical industries are identified by their colour codes. The color of pipeline carrying steam is
A. Black
B. Silver grey
C. Green
D. Yellow
✅ The correct answer is option B.
819. A spark ignition petrol engine has
A. Throttle valve
B. Carburettor
C. Both A & B
D. Neither A nor B
✅ The correct answer is option C.
820. Which of the following is the most effective inhibitor of grain growth, when added in small quantity in steel ?
A. Manganese
B. Vanadium
C. Cobalt
D. Copper
✅ The correct answer is option B.