Important Questions
All these questions are very important from
an exam point of view.
Unit 1: Basics of Engineering Materials
1. Explain the different crystal structures
found in engineering materials. (1.2 Structure of metal-unit cell, BCC, FCC,
HCP)
2. Describe the procedure for preparing a
specimen for microscopic examination. (1.4 Specimen preparation procedure)
3. Differentiate between physical,
mechanical, and thermal properties of metals. (1.5 Properties of
metals-Physical-mechanical-thermal).
4. How is a specimen prepared for
microscopic examination? Describe the step-by-step procedure for preparing a
sample to observe under a microscope.
5. Define what these properties mean (e.g.,
hardness, ductility, thermal conductivity) and how they affect the material's
performance in engineering applications.
Unit 2: Steels and Alloys
1. What are the different types of cast
iron, and how are they used in engineering?
2. Explain the properties and uses of grey
iron, white iron, and malleable iron.
3. How are steels classified, and what are
the properties of plain carbon steels? {Discuss how steels are grouped based on
their carbon content (low, medium, high), and the significance of carbon
content for their applications.}
4. What are alloy steels? How do alloying
elements affect the properties of alloy steels?
5. Write short notes on the designation and
coding of plain and alloy steel as per BIS/ASME.
6. What are the purposes of case hardening?
Explain the processes involved in carburizing and nitriding.
Unit 3: Non-Ferrous Metals and Alloys
1. Discuss the properties and applications
of copper and its alloys. (3.1 Copper and its alloys)
2. What are the important properties of
aluminum and its alloys? Mention any two specific applications. (3.2 Aluminum
and its alloys)
3. Explain the chemical composition and
applications of Nickel-based alloys. (3.3 Nickel and its alloys)
4. Discuss the materials used for bearings
with an emphasis on white metal and aluminum bronzes. (3.4 Bearing materials)
5. What makes aluminum and its alloys
useful in engineering?
6. Explain the lightweight,
corrosion-resistant nature of aluminum and where it is commonly used.
7. Describe how nickel alloys are used in
high-temperature and corrosion-resistant applications, such as in turbines and
aerospace.
8. Explain the properties of materials like
white metal (tin-based alloys) and aluminum bronzes that make them suitable for
bearings.
Unit 4: Non-Metallic and Advanced Materials
1. Describe the different types of polymers
(plastics, rubbers), how they behave under heat, and where they are used.
2. Explain the difference between
thermoplastics (e.g., PVC, nylon) and thermosetting plastics (e.g., epoxy
resins) in terms of their heat resistance and recycling.
3. Discuss the properties of ceramics, such
as hardness and heat resistance, and where they are used (e.g., in electronics,
cutting tools).
4. What are advanced engineering materials
like biomaterials and nanomaterials?
5. Explain how materials like biomaterials
(used in medical implants) and nanomaterials (used in electronics and coatings)
are different from traditional materials.
Unit 5: Heat Treatment Processes
1. Explain the iron-carbon equilibrium
diagram and its significance in heat treatment processes.
2. What is annealing? Discuss the different
types of annealing processes and their applications.
3. Describe the tempering process. What are
the types of tempering and its industrial applications?
4. What are the purposes of case hardening?
Explain the processes involved in carburizing and nitriding.
5. Discuss the factors affecting fuel
consumption in an engine. (Include variables like friction, power, and thermal
efficiency.)
Unit 6: Surface Treatment for Materials
1. What are the different types of
corrosion, and how can corrosion be prevented in engineering materials?
2. Discuss the various methods of surface
treatment for protecting materials from corrosion.
3. Explain the electrolysis process for
surface coating. What are its applications in material protection?
4. What are the advantages of a two-stroke
engine over a four-stroke engine?
5. What is electrolysis, and how is it used
for surface coating? Describe the process of electrolysis and how it is used to
coat materials (e.g., electroplating) to prevent corrosion and wear.