Past Papers Chemical Engineering Materials

By: Prof. Dr. Fazal Rehman | Last updated: March 3, 2022

Guess Paper 1: Chemical Engineering Materials Fall – 2020 Past Papers

University Name – Confidential

Time Allowed: 3 hours Total Marks:    70, Passing Marks (35) Q.1 Attempt the following MCQs: 7*2=14 1- Which of the following material has maximum ductility? A: Mild steel B: Copper C: Nickel D: Aluminium 2- Shock resisting steels should have _________. A: low wear resistance B: low hardness C: low tensile strength D: toughness 3- Cast iron is a ____. A: ductile material B: malleable material C: brittle material D: tough material 4- Connecting rod is, usually, made from _________. A: low carbon steel B: high carbon steel C: medium carbon steel D: high speed steel 5- The hardness is the property of a material due to which it __________. A: can be drawn into wires B: breaks with little permanent distortion C: can be rolled or hammered into thin sheets D: can cut another metal 6- The percentage of carbon in cast iron varies from ____________. A: 0.1 to 0.5 B: 0.5 to 1 C: 1 to 1.7 D: 1.7 to 4.5 7- Nickel when added to copper improves______________. A: Machinability B: Hardness C: Hardness and strength D: Strength and ductility. Question No: 02 7*2=14 A- Define stress and strain also mention its units. Explain different types of stress and strain. B- What are applications of stress and strain in chemical engineering design? Question No: 03 7*2=14 A- What is an alloy? Discuss different types of alloys. B- Explain in detail the alloys of Copper and aluminum. Question No: 04 7*2=14 A- Explain the synthesis of Teflon. B- What are the applications of PTEF and PVC? Question No: 05 7*2=14 A- What do you know about the special material of construction? B- Why we study the physical, mechanical, and thermal properties of the material? Question No: 06 7*2=14 A- What is corrosion? What are the causes of corrosion? B- Discuss the nature and rate of corrosion briefly. Question No: 07 7*2=14 A- Discuss different types of corrosion. B- How corrosion can be controlled? Question No: 08 Attempt only two questions. 7*2=14 A- Explain cathodic protection for metallic corrosion. B- Explain anodic protection of cast iron material. C- What are the causes and effects of stress corrosion?

Guess Paper 2: Chemical Engineering Materials Spring – 2019 Past Papers

University Name – Confidential

Time Allowed: 3 hours Total Marks:    70, Passing Marks (35) Q.1 Attempt the following MCQs: 7*2=14 i. Presence of nickel in steel improves its______________. A: corrosion resistance B: cutting ability C: wear resistance D: all (a), (b) and (c). ii. Hammers and railway rails are normally made of ____________. A: mild steel B: dead mild steel C: medium carbon steel D:high carbon steel. iii. Coke oven regenerators are made of __________ bricks. A: fire clay B: silica C: low thermal conductivity D: high electrical conductivity iv. Shock resisting steels should possess high ___________. A: hardness B: toughness C: tensile strength D: wear resistance. v. The purpose of nitriding the steel is to ________________.A: harden its surface B: soften its surface C: improve its reliability. D: none of these. vi. The main purpose of galvanising iron sheets is to _______________. A: harden the surface B: increase its glossiness and lustre. C: prevent the action of water D: prevent the action of oxygen vii. The behavior of visco-elastic material is time-dependent. This behaviour is common in __________ materials. A: non-crystalline solid B: crystalline C: rubbery D: non-crystalline organic polymeric Q: 02 A. Define Stainless steel. Give three examples. B. Write differences between iron and steel. Q: 03 A. Explain Cathodic and anodic protection. B. Define Physical and chemical properties of Polyolefins. Q: 04 A. Define Corrosion as an electrochemical reaction. B. Explain types of corrosion with examples. Q: 05 A. What is stress corrosion? Give two examples. B. Explain Polytetra fluoro ethylene(PTFE) glass. Q: 06 A. What are alloys? How they promote mechanical strength? B. Write the definition of stress and strength. Also, classify the type of stress. Q: 07 Write short notes on any two of the following: 7+7=14 A. Describe the coating and its advantages. B. Explain cracking and fatigue corrosion. C. Define nickel and its mechanical properties.