301. Hardening of steel is not possible, unless it is heated __________ critical point.
A. Above the highest
B. Above the lowest
C. Between the first & second
D. Between the second & third
✅ 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.
303. The refractory lining of the bottom in a basic electric arc furnace is made of
A. Silica
B. Alumina
C. Magnesia
D. Fireclay
✅ The correct answer is option C.
304. Work hardenable alloy steel used to make the bucket wheel excavators, blades of bulldozers and other earth moving equipments contain iron, carbon and
A. Manganese
B. Silicon
C. Nickel
D. Chromium
✅ The correct answer is option A.
305. Dislocation cross-slip is difficult in those materials, which have
A. Large number of slip systems
B. High work hardening rate
C. Coarse grain size
D. Low stacking fault energy
✅ The correct answer is option D.
306. Plasma is
A. A high temperature neutral gas
B. Nothing but ionised gas
C. A source of steady and highest controllable pressure
D. Formed at very low temperature
✅ The correct answer is option B.
307. Which of the following pairs is not correctly matched?
A. Uranium – 233 : Fertile material
B. Bindingenergy : Mass defect
C. Scattering : Absorption cross-section
D. Number of nucleons : Mass number
✅ The correct answer is option A.
308. Hydrogen can be
A. Used in I.C. engines as fuel
B. Liquefied & stored under cryogenic conditions
C. Produced by electrolysis of water
D. All of the above
✅ The correct answer is option D.
309. RADAR is
A. Acronym for Radio Detection and Ranging
B. Name of technique for locating distant objects
C. Name of instrument for locating distant objects
D. All of the above
✅ The correct answer is option D.
310. High relative humidity decreases the evaporative process and as the temperature is increased, the relative humidity decreases. The comfort range for human body is the ambient temperature of 22 to 27°C with relative humidity ranging from __________ percent.
A. 5 to 10
B. 15 to 25
C. 45 to 50
D. 75 to 80
✅ The correct answer is option C.