⚗️ 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

Thermoplastics are never moulded usingAnswer: Compression moulding Pick out the wrong statement. If the net positive suction head (NPSH) requirement of a pump is not satisfied, thenAnswer: Its efficiency will not be affected. While the thermosetting polymers are amorphous in nature, the thermoplastic polymers are either amorphous or crystalline. The crystalline polymers are characterised by theAnswer: Low impact strength. Which one is not an induced draught furnace?Answer: Blast furnace stove The stress at which a metal fails by fatigue liesAnswer: In the elastic range. Annealing of a material does notAnswer: Case harden it. Overfire burning in a furnace is a phenomenon characterised byAnswer: Burning carbon monoxide and other incombustible in upper zone of furnace by supplying more air. Which of the following is not an ore of aluminium ?Answer: Troosite Boiler draught of 10 mm water column is equivalent toAnswer: 10 kgf/m² If fuel and air are mixed ahead of the burner, it is called a/an __________ burner.Answer: Premix The fugacity of liquid water at 298 K is approximately 3171 Pa. Considering the ideal heat of vaporisation as 43723 J/gm mole, its fugacity at 300 K would beAnswer: 3567Pₐ The leg of a barometric leg pump is longer than the Toricellian leg, which is about __________ metres.Answer: 10 Commonly employed coolant for high pressure turbogenerator isAnswer: Hydrogen Neutral atmosphere is maintained in a/an __________ furnace.Answer: Cold rolled steel coil annealing Slight displacement of a floating body in liquid makes it to oscillate about itsAnswer: Metacentre. Buoyancy force depends on the __________ the liquid.Answer: Displaced mass of The resistance furnace produces heat by theAnswer: Flow of current through a heating element. "Encyclopaedia of Chemical Technology" has beenAnswer: Edited by Kirk Othmer. Which of the following variables does not affect the furnace capacity ?Answer: None of these. Statistical quality control was developed by __________ , an American scientist during world war II.Answer: Water shewhart Production of a hollow product by inflation of a tube or parison is called the __________ process.Answer: Blow moulding A spark ignition petrol engine hasAnswer: Both (a) & (b) Unit of furnace loading isAnswer: Ton stock/hr/m² hearth area Out of the following, the highest emf for a given temperature is generated by the __________ thermocouple.Answer: Iron - constantan Which is the only metal that exists in liquid state at room temperature?Answer: Mercury In a furnace operation, which is not preheated ?Answer: Both (a) and (b). An approximately __________ process exemplifies the flow of a gas through a very long pipe of uniform cross-section.Answer: Isothermal A metal having a Poisson's ratio = 0.3 is elastically deformed under uniaxial tension. If the longitudinal strain = 0.8, then the magnitude of thickness strain isAnswer: -0.24 Operation of blast furnace stove is based on the principles of a __________ furnace.Answer: Regenerative The quantity of electricity required to deposit one gm equivalent of any substance is oneAnswer: Faraday