⚗️ Chemical Engineering Solved MCQs with Answers

Practice 1920 approved ⚗️ Chemical Engineering questions with verified answers from the 🛠️ Engineering Essentials subject for Pakistan exams.

1920 solved MCQs

Which refractory must have controlled atmosphere (temperature and humidity) for its safe storage ?Answer: Tar bonded dolomite bricks Dies for wire drawing are generally made ofAnswer: Mild steel Alumina-graphite bricks are used for lining theAnswer: Both (a) and (b). The starting of a car takes time in winter, because theAnswer: Vaporisation of the fuel is decreased. The elastic strain in copper is due to theAnswer: Motion of dislocations. Milk is fat dispersed in water. It is an example ofAnswer: Emulsion __________ is the most suitable lubricant for drawing mild steel wires?Answer: Sodium stearate Spalling resistance of a refractory can not be increased byAnswer: Making it denser. Reduction in the grain size reduces the __________ of the material.Answer: All (a), (b) & (c) Fireclay refractories haveAnswer: Low co-efficient of thermal expansion. Absolute zero, pressure will occur, when the molecular momentum of the system becomes zero. A liquid will cease to exist as liquid atAnswer: Zero pressure In case of simple harmonic motion, displacement is proportional to theAnswer: Acceleration Periclase isAnswer: Crystalline form of MgO. In TIG welding, thoriated tungsten electrodes are used, because itAnswer: Has better electron emissivity. Which of the following is not a neutral refractory ?Answer: Magnesite Vernier calipers can not be used to measure theAnswer: Clearance between two mating surfaces. Which of the following is not the commercial name of polymethyl-methacrylate (PMMAAnswer: Styrofoam Which is a basic refractory ?Answer: Chrome magnesite On being hit with a hammer, __________ will readily fracture.Answer: Cast iron Which of the following does not discharge the dust collected as a dry solid ?Answer: Wet scrubber Cold crushing strength of a refractory does not depend upon itsAnswer: Shape Wood is a/an __________ material.Answer: Cellular Refractoriness under load (RUL) is the most important property for the refractory bricksAnswer: At the hearth bottom of the furnace on which stock is placed. Which of the following consumes the maximum tonnage of refractories annually in an integrated steel plant ?Answer: L.D. converter Which of the following consumes the maximum tonnage of refractories annually in an integrated steel plant ?Answer: L.D. converter __________ nozzles are used in continuous casting of steel,Answer: Zircon Use of flux during soldering is done toAnswer: Prevent oxide formation. The most important consideration in value engineering is theAnswer: Customer satisfaction. Resilience of a bolt can be increased by increasing itsAnswer: Length Ammonia leakage in the refrigeration system is detected byAnswer: Sulphur stick, which on detection gives white smoke.