⚗️ 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

In __________ process, ions of salts react with water to produce acidity or alkalinity.Answer: Hydrolysis __________ is used for tying the steel coloumns to concrete foundation.Answer: Anchor bolts Fatigue resistance of a material is measured by theAnswer: endurance limit. __________ is the trade name assigned to a non-ferrous cast alloy composed of cobalt, chromium & tungsten.Answer: Stellite __________ is the trade name assigned to a non-ferrous cast alloy composed of cobalt, chromium & tungsten.Answer: Stellite A dense structure of grinding wheel is not used for theAnswer: Ductile material. Which of the following is not a principal alloying element for the structural steel?Answer: Molybednum MetalloidsAnswer: Are compounds that exhibit both metallic & non-metallic properties to some extent and are exemplified by elements like germanium, silicon & boron. Pick out the wrong statementAnswer: Mass production of seamless pipes are done by electrical resistance welding (ERW). Lead is poured into the joints between two __________ pipes.Answer: Cast iron 'Ice point' is designated on Farenhite temperature scale byAnswer: 32° Maximum hardenability of steel depends upon itsAnswer: Alloying elements content Blast furnace slag is mainly moltenAnswer: Calcium silicate A jet engine turbine blade is normally manufactured byAnswer: Investment casting. Stainless steel is welded usingAnswer: Inert gas arc welding. The cooling rate required to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours is __________ BTU/hr.Answer: 200 The phenomenon occurring during explosion of a hydrogen bomb isAnswer: A combination of both nuclear fission & fusion. Square steel key is normally strong in failure by shear & crushing. Keys are normally made of __________ steel bars.Answer: Cold rolled mild Nitriding of a steel part does not increase itsAnswer: Grain size. __________ of grey cast iron produces white cast iron.Answer: Rapid heating As the fluid flow rate increases, the float of the rotameterAnswer: Rises in the tube. Tin plated iron and galvanised iron are generally produced byAnswer: Hot dipping In a drilling process, the metal is removed by both shearing & extrusion. General purpose drills are made ofAnswer: High speed steel Dezincification is a form of corrosion espe-cially applicable toAnswer: Brass Which of the following materials is not suitable as a die material for wire drawing?Answer: Bronze By X-ray diffraction, it is not possible to determine theAnswer: Residual localised stresses. In continuous casting process, graphite moulds are used with a view to providingAnswer: Self lubricating qualities. Energy required to compress a hot gas as compared to cold gas will beAnswer: More. In the commercial production of which of the following metals, matallothermic reduction is used ?Answer: Zinc New water wells are disinfected with chlorine in the form ofAnswer: Bleaching powder