⚗️ 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

Common salt is produced from sea water in India generally by the __________ method.Answer: Solar evaporation Batch process is preferred over continuous process, when theAnswer: Sales demand of product is not steady. Which of the following is a permanent fastening?Answer: Rivets Hot & cold working of material causes its __________ deformation.Answer: Plastic The ratio of thermal & electrical conductivity is same for all the metals at the same temperature ; and at around room temperature, this ratio is proportional to(where, T = absolute temperature, °K)Answer: 1/T² In a fuel cell, chemical energy is converted intoAnswer: Electrical energy directly. Direct costs component of the fixed capital consists ofAnswer: Onsite and offsite costs Out of the following, the depreciation calculated by the __________ method is the maximum.Answer: Diminishing balance The ratio of working capital to total capital investment for most chemical plants (except for non-seasonal based products) is in the range of __________ percent.Answer: 10 to 20 Utilities cost in the operation of chemical process plant comes under theAnswer: Direct production cost Which of the following is not a cupro-nick-el alloy ?Answer: Muntz metal Electrochemical corrosion occursAnswer: Where the liquid electrolytes containing free ions are present. The ability of tool steel to resist softening at high temperatures is termed as __________ hardness.Answer: Super Improvement in mechanical properties of metals in its hot working is due to the grainsAnswer: Refinement Young's modulus of elasticity of a material is the slope of the initial linear portion of the stress-strain curve. It decreases ap-preciablybyAnswer: Heat treatment Venturimeter is used to measure the flow rate of fluids in pipes, when the pipe is in __________ position.Answer: Any Often earing defects are found during deep drawing operation, because theAnswer: Starting sheet has planer anisotropy due to its texture. __________ is not a case hardening process.Answer: Carburising The total investment in a project is Rs. 10 lakhs and the annual profit is 1.5 lakhs. If the project life is 10 years, then the simple rate of return on investment isAnswer: 1.5% Which one can be directly solidified from gaseous state wihtout entering into liquid state ?Answer: Carbon dioxide Which of the following is termed as the boiler mounting ?Answer: Blow off cock Shock resisting steels should possess highAnswer: Toughness Fatigue life is expected to increase byAnswer: Having compressive residual stresses at the surface. Nominal and effective interest rates are equal, when the interest is compoundedAnswer: In no case, they are equal Specific __________ is a dimensionless quantity.Answer: None of these Which of the following elements is not included in the scope of market analysis ?Answer: Competition from other manufactures. __________ is not used as the control rod material in a nuclear reactor.Answer: Cobalt Superheated vapour behaves likeAnswer: Gas approximately __________ of depreciation calculation accounts for the interest on investement.Answer: Neither (a) nor (b). Which of the following is a boiler accessory i.e., not a boiler mounting ?Answer: Feed water pump