⚗️ 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

Research reactors are normally meant forAnswer: Producing high neutron flux 1012-1013 neutrons/cm2, sec and studying the effect of neutron bombardment on dif ferent materials. Out of the followingplaces, a nuclear power plant is not located atAnswer: Talcher (Orissa) The instrument based on the following principle is used for the measurement of oxygen only in the flue gases.Answer: Paramagnetism. Work study deals with the __________ study.Answer: Both (a) & (b). Maximum change in the hardness of mar tensite occurs in the carbon content range of __________ percent in steel.Answer: 0.2 to 0.4 Knocking tendency in a petrol engine decreases with increasingAnswer: Engine speed Hooke's lawAnswer: Applies to elastic deformation. Which of the following is not an ore of iron ?Answer: Chalcopyrite Which is the most lethal weapon ?Answer: Cobalt bomb Reynolds number of a fluid flowing in a circular pipe is 10000. What will be the Reynolds number when the fluid velocity is decreased by 30% & the pipe diameter is increased by 30% ?Answer: 9100 An example of unsteady non uniform flow is the flow of liquid under pressure through aAnswer: Tapering pipe at either decreasing or increasing flow rate. Which of the following contributes maximum as main source of sulphur in the blast furnace charge ?Answer: Coke A colloidal system, in which a liquid is dispersed in gas is called a/anAnswer: Aerosol Blast furnace is aAnswer: Counter current reactor Speed of a submarine in deep sea & that of an aeroplane is measured by a/anAnswer: Pitot tube The primary strengthening mechanism in 70 : 30 brass is theAnswer: Solid solution strengthening. X-rays do not exhibit the property ofAnswer: Scattering Killed steelsAnswer: Are free from oxygen. Which of the following phenomenon/ phenomena is/are diffusion controlled ?Answer: Recrystallisation Joule-Thomson co-efficient is the ratio ofAnswer: Temperature change to pressure change occuring during adiabatic throttling of a gas. Expansion device used in a window air-conditioner is a/anAnswer: Capillary tube. In the acid Bessemer process, the hot metal should have the following com-positon.Answer: S < 0.05% and P < 0.05%. Which of the following does not come under the category of electrochemical corrosion ?Answer: Corrosion in organic liquids. Unbreakable crockeries are made from __________ polymers.Answer: Polyurathane Cupola produces __________ iron..Answer: Cast Euler number is defined as the ratio of inertia force to __________ force.Answer: Pressure Holes for rivetting purposes should be preferably made byAnswer: Drilling One of the methods of purification of leach liquor is ion exchange, which involvesAnswer: Exchange between a liquid phase and an organic resin phase. A steam pipe is intended to be insulated with two layers of insulating materials of different thermal conductivities. For minimum heat transfer to take placeAnswer: Steam temperature is considered before deciding as to which insulating material is to be put inside (i.e., just next to the pipe). Large diameter shafts are manufactured byAnswer: Forging and turning to size.