⚗️ 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

Which of the following is not a recuperative furnace ?Answer: Coke oven. Surface tension is due to the __________ forces.Answer: Difference between adhesive & cohesive At absolute zero temperature, for any reaction involving condensed phasesAnswer: Δ S° = 0 , Δ E° = 0 Size of the combustion chamber of a furnace depends upon theAnswer: All (a), (b) and (c). Metals in general have a low value of thermalAnswer: Inertia Reheating furnace (pusher type) is used for heatingAnswer: Slabs __________ of test specimens is not involved in any hardness testing method.Answer: Fracture Out of the following, the most ductile material isAnswer: Mild steel The rate of scaling of furnace stock depends upon theAnswer: All (a), (b) and (c) Main gas valve in a gaseous fuel burner is a __________ valve.Answer: Globe What happens, when SO₂ is passed through a solution of H₂S in water ?Answer: Precipitation of sulphur takes place. Pot furnace which is either regenerative or recupterative, is used in the manufacture ofAnswer: Glass Which of the following will resist maxi-mum shock & vibration without cracking?Answer: Malleable iron Surface tension of a liquidAnswer: All (a), (b) & (c). Which of the following advantages is not associated with the use of preheated air for combustion of a fuel in the furnace ?Answer: Increase in calorific value of the fuel. For dynamic strain measurement, the wheatstone bridge used is of __________ type.Answer: Voltage sensitive null Which drug is made from vegetables ?Answer: Quinine A refractory wall separating the stock and the source of heat is provided in aAnswer: Muffle furnace Which of the following are made out of the carbon steel having carbon content of 0.9 to 1% ?Answer: Small punches, broaches reamers and springs. Which one shows the diagramatic heat balance in a furnace ?Answer: Sankey diagram Material of construction of surveying metallic tapes is __________ which has low coefficient of expansion & enough strength.Answer: Invar Welded joint is superior to revetted joint in respect of ease of fabrication, weight and strength. Which of the following joints is the most suitable for pipes carrying fluids under high pressure and temperature ?Answer: Expansion joint Silicon percentage in acid resistant cast iron is aboutAnswer: 4 Thermal expansion of solid is employed in the temperature measurement by aAnswer: Bimetallic thermometer. Stress and strain are related by __________ elastic constants for a linearly elastic, homogeneous & isotropic material.Answer: Two Decarburisation of steelAnswer: All (a), (b) and (c). The behaviour of a metal specimen, which when plastically strained in tension reduces its yield stress in compression and vice versa; is termed as theAnswer: Bauschinger effect. Blast furnace stoves are meant for heatingAnswer: Air Function of fusible plug in a boiler is toAnswer: Put off fire in the furnace when water level in the boiler falls to unsafe limit. What is the range of tempering temperature (°C) for most of the materials ?Answer: 200-300