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Engineering Materials MCQ Questions & Answers | Mechanical Engineering

Learn Engineering Materials MCQ questions & answers are available for a Mechanical Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Engineering Materials MCQ question is the important chapter for a Mechanical Engineering and GATE students. Page-9 section-1

Each section contains 100 MCQs on Engineering Materials .
81
Phosphor bronze contains
Discuss
Answer & Solution
Answer: Option D
Solution:
phosphor bronze is an alloy of copper with 0.5–11% of tin and 0.01–0.35% phosphorus
82
A material is known as allotropic or polymorphic if it
Discuss
Answer & Solution
Answer: Option B
Solution:
A material is known as allotropic or polymorphic if it Exists in several crystal forms at different temperatures
83
Sulphur in cast iron
Discuss
Answer & Solution
Answer: Option B
Solution:
Sulphur in cast iron Increases hardness and brittleness
84
An example of amorphous material is
Discuss
Answer & Solution
Answer: Option D
Solution:
Glass is an example of amorphous material
85
Steel made from phosphate iron is
Discuss
Answer & Solution
Answer: Option A
Solution:
Steel made from phosphate iron is Brittle
86
The alloying element which reduces the formation of iron sulphide in steel is
Discuss
Answer & Solution
Answer: Option D
Solution:
Manganese reduces the formation of iron sulphide in steel
87
In low carbon steels, ________ raises the yield point and improves the resistance to atmospheric corrosion.
Discuss
Answer & Solution
Answer: Option B
Solution:
In low carbon steels, Phosphorus raises the yield point and improves the resistance to atmospheric corrosion.
88
Permalloy is a
Discuss
Answer & Solution
Answer: Option D
Solution:
Permalloy is a nickel–iron magnetic alloy, with about 80% nickel and 20% iron content
89
Process of Austempering results in
Discuss
Answer & Solution
Answer: Option A
Solution:
Austempering is heat treatment that is applied to ferrous metals, most notably steel and ductile iron.
In steel it produces a bainite microstructure whereas in cast irons it produces a structure of acicular ferrite and high carbon, stabilized austenite known as ausferrite
90
Which is false statement about tempering? Tempering is done to
Discuss
Answer & Solution
Answer: Option A
Solution:
Tempering is a process of heat treating, which is used to increase the toughness of iron-based alloys