A. Mass
B. Volume
C. Surface area
D. All of the above
✅ The correct answer is option D.
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.
772. Alumina, silica, lime and iron oxide are the basic raw material for the manufacture of portland cement. The component of Portland cement which first hardens is
A. 5CaO . 3 Al2O₃
B. 3CaO . Al2O₃
C. 3CaO . SiO₂
D. 2CaO . SiO₂
✅ The correct answer is option A.
773. __________ cycle is the most efficient thermodynamic cycle.
A. Diesel
B. Otto
C. Rankine
D. Carnot
✅ The correct answer is option D.
774. If a heat transfer surface is pock-marked with a number of cavities, then as compared to a smooth surface the heat transfer by __________ will not increase.
A. Convection
B. Nucleate boiling
C. Radiation
D. Conduction
✅ The correct answer is option A.
775. Which of the following absorbs maximum heat in a high pressure boiler ?
A. Economiser
B. Steam superheater
C. Air preheater
D. Furnace water wall
✅ The correct answer is option D.
776. __________ remains constant during the adiabatic cooling of moist air.
A. Wet bulb temperature
B. Dry bulb temperature
C. Relative humidity
D. Specific humidity
✅ The correct answer is option A.
777. Multistage compression of air as compared to single stage compression offers the advantage of
A. Power saving per unit weight of air delivered
B. Moisture elimination in the inter-stage cooler
C. Increased volumetric efficiency
D. All of the above
✅ The correct answer is option D.
778. Maximum permissible air velocity in pipelines is about __________ metre/second.
A. 5
B. 10
C. 20
D. 40
✅ The correct answer is option B.
779. Ultimate strength in tension as compared to that in shear for steel is
A. Half
B. One third
C. One and half times
D. One fourth
✅ The correct answer is option C.
780. Globular form of cementite is formed during the __________ process.
A. Spherodising
B. Hardening
C. Annealing
D. Normalising
✅ The correct answer is option B.