⚗️ 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

Optimum number of effects in a multiple effect evaporator is decided by theAnswer: Cost benefit analysis. Which of the following is the costliest source of getting hydrogen on commercial scale for the manufacture of nitrogeneous fertiliser ?Answer: Alectrolysis of water Cost of piping in a fluid processing unit (e.g., distillation) of a chemical process plant is about __________ percent of the fixed capital investment.Answer: 13 Which one of the following is incombustible ?Answer: CCl4 The softness or hardness of a grinding wheel depends upon the type & amount of bonding material used. For general purpose cutter grinding __________ grinding wheel is normally used.Answer: Aluminium oxide Tin based white metals are used, where bearings are subjected toAnswer: High pressure & load. Friction factor for fluid flow in pipe does not depend upon theAnswer: Pipe length. All of the following alloying elements of steel increases hardness but sacrifice ductility, exceptAnswer: Nickel The following type of bonding is strongly directional in solids.Answer: Covalant Chromium molybdenum steel can not be welded using __________ welding.Answer: Electrical resistance Speisses is a mixture of the following:Answer: Arsenides of heavy metals. Auto collimator is used to checkAnswer: Angle In troposphere (the weather domain), the temperature 't' at height 'h' above the sea level in metres is given by (where, temperature at sea level is 15°C and t is in °C.)Answer: t = 15 - 0.0065 h A high pressure boiler generates steam at a pressure greater than __________ kg/cm₂Answer: 80 Evaporative cooling process employs a combination of cooling and humidification in which theAnswer: Sensible heat is removed and the latent heat is added. Which of the following is not an explosive ?Answer: CMC Maxwell's thermodynamic relations applies to theAnswer: Chemical systems in equilibrium. Annealing ofwhite cast iron produces __________ iron.Answer: Malleable Resistance of an electrical conductor is proportional to its (where, l = length and A = cross-sectional area of the conductor)Answer: both 'a' & 'b' A solar cell converts the sunlight directly into __________ energy.Answer: Electrical If a nuclear reactor produces more fissile nuclear fuel than it consumes, then it is called a __________ reactor.Answer: Breeder Wrought iron is never shaped byAnswer: Casting Safety matches is produced usingAnswer: Red phosphorus Calorific value of __________ are almost same.Answer: Petrol & diesel Which of the following pairs is not correctly matched ?Answer: Scattering: Absorption cross-section. Commonly used flux for brazing isAnswer: Borax Iron has got __________ isotopes.Answer: Four Semi-conductors normally employ __________ bonding.Answer: Covalant High endurance limit of carburised machine parts is because of the fact that carburisationAnswer: Introduces a compressive layer on the surface. In __________ process, there is an increase in entropy with no degradation of energy.Answer: Isothermal expansion