⚗️ 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

Minimum temperature upto which water can be theoretically cooled down in the cooling tower by evaporative cooling is equal to the __________ temperature of air.Answer: Wet bulb __________ is not a single oxiderefractory.Answer: Silicon carbide Heat transfer to the water wall in a high pressure water wall type boiler furnace is mainly byAnswer: Radiation Hot blast main (carrying air at 1000°C) in blast furnace are lined with __________ bricks.Answer: Fireclay Addition of __________ to steel does not impart hardness.Answer: Copper High alumina refractory compared to fireclay bricks haveAnswer: High resistance to thermal shock and creep. For a spontaneous natural process at constant temperature and pressure, the free energy of the system alwaysAnswer: Increases. Inertial forces are obtained, when the elastic forces are multiplied by __________ number.Answer: Mach Temperature of hot gases flowing in a pipe is measured by a thermocouple inserted in the thermal well. The thermal well made of __________ will facilitate the most accurate measurement of the temperature.Answer: Copper Wavelength of radiation emitted by a body depends on the __________ of its surface.Answer: Temperature Out of the following, which will fracture most readity, when hit with a hard hammer ?Answer: Cast iron A pycnometer is used for the measurement ofAnswer: Specific gravity of a liquid. Refractory bricks having lower porosity haveAnswer: Greater strength For infinite parallel planes having emis-sivities ε₁ & ε₂, the interchange factor for radiation from surface 1 to surface 2 is given byAnswer: ε₁.ε₂/(ε₁ + ε₂ - ε₁.ε₂) Working of linear variable differential transducer (LVDT) is based on the principle of variableAnswer: Mutual inductance A highly elastic material is deformed least on loading and retains its original form on removal of the load. Which of the following is the most elastic material?Answer: Steel Maximum permissible sulphur content in steel is __________ percent.Answer: 0.015 The dimensional formula of bulk modulus of elasticity is same as that of theAnswer: Pressure Ferromagnetic material owe their properties to __________ inner sub-shells.Answer: Partially filled Which of the following metals is the most prone to work hardening?Answer: Brass In panel test for spalling resistance, the average face temperature of panel assembly is maintained at __________ °C for 24 hours.Answer: 2000 'Amortization' in respect of financial obligation of a company means theAnswer: Liquidation of financial obligations on instalment basis. Which is not an acidic refractory ?Answer: Carbon black Natural silicaAnswer: All (a), (b) and (c) Difference at any instant between the value of the controlled variable and the set point is called theAnswer: Deviation The expected efficiency of a single rivetted lap joint is of the order of 50%. If the thickness of the plate is increased four times, then the rivet diameter will have to be increased __________ times.Answer: Two Nickel and __________ are the alloying element added in steel to increase its toughness.Answer: Silicon Which of the following equipments is used for liquid dispersion ?Answer: Venturi scrubber Dolomite bricks have good resistance to attack byAnswer: Molten steel Eutectoid composition of carbon steel at room temperature isAnswer: Pearlite