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
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.
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.