⚗️ 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

Conversion of silica mineral to cristobalite is accompanied by reduction in itsAnswer: Specific gravity Chrome magnesite bricks areAnswer: Having higher RUL than silica bricks. Chrome magnesite is not used in theAnswer: Wear out lining of steel melting furnaces. Silica refractories are not used inAnswer: Beehive coke ovens. Refractory materials are never used in the construction ofAnswer: Pressure vessels Which of the following bricks has the most close values of RUL and PCE ?Answer: Silica bricks Segar cones are used for the determination of __________ of refractories.Answer: Softening temperature Fireclay bricks are used in theAnswer: All (a), (b) and (c). Carbon refractories have very highAnswer: Both (b) and (c) Which of the following is capable of acting both as an acid flux as well as a basic flux in the metal extraction from its ore ?Answer: Alumina Which is the most suitable joint for the pipes, with are laid submerged under water, where the bottom of the river bed is uneven ?Answer: Flexible joint Floating control actionAnswer: Moves the final control element at constant speed in either direction in response to an error signal. Cement Kiln is aAnswer: Rotary Kiln Boiler rating is normally done in terms ofAnswer: Steam output (tons/hr). In a furnace employing forced draught as compared to induced draught,Answer: Positive pressure exists in the furnace. The pressure drop per unit length for laminar flow of fluid through a long pipe is proportional to (where, A = cross-sectional area of the pipe & D = Diameter of the pipe)Answer: 1/A Number of electrons in the outermost orbit of a semi-conductor isAnswer: 4 Regenerators are installed inAnswer: Both (a) & (b) The condition of diffraction from a crystal is given byAnswer: nλ = 2d Sin θ Which of the following is a heat treatment furnace ?Answer: Annealing furnace Galena is an ore ofAnswer: Lead __________ atmosphere is maintained inside an iron blast furnace.Answer: Reducing A reduction process is accompanied with increase in theAnswer: Number of electrons. Draught produced by a tall chimney due to density difference between hot flue gas inside the Chimney and atmospheric air outside the chimney is more appropriately known as the __________ draught.Answer: Natural Example of an indirectly heated furnace isAnswer: Both (a) and (b) First empirical temperature scale conceived is the __________ temperature scale.Answer: Farenhite Which furnace employs preheating, heating and soaking zones ?Answer: Reheating furnace In continuous casting of liquid steel, the mould is made ofAnswer: Water cooled copper. Calcination of limestone to produce lime is done in a __________ kiln.Answer: Both (b) and (c) Diamond does not conduct electricity, becauseAnswer: No free electrons are present.