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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-8 section-2

Each section contains 100 MCQs on Engineering Materials .
71
Isotropic materials are those which have the same
Discuss
Answer & Solution
Answer: Option A
Solution:
Isotropic materials are those which have the same Elastic properties in all directions
72
The material in which the atoms are arranged chaotically, is called
Discuss
Answer & Solution
Answer: Option A
Solution:
The amorphous material is a noncrystalline solid, and the glass is amorphous material produced through melt quenching.
73
Tungsten when added to steel __________ the critical temperature.
Discuss
Answer & Solution
Answer: Option C
Solution:
Tungsten when added to steel to raises the critical temperature.
74
Which of the following represents the allotropic forms of iron?
Discuss
Answer & Solution
Answer: Option D
Solution:
Alpha iron, gamma from and delta iron are the allotropic form of iron.
75
The addition of which of the following improves machining of copper?
Discuss
Answer & Solution
Answer: Option A
Solution:
The addition sulphur improves machining of copper
76
Vanadium in high speed steels
Discuss
Answer & Solution
Answer: Option C
Solution:
The effects of Vanadium refines grain size, increases hardenability, fracture toughness, and resistance to shock loading. Softening at high temperatures, fatigue stress and wear resistance are improved. At greater than 0.05%, there may be a tendency for the steel to become embrittled during thermal stress relief treatments.
Vanadium is used in nitriding, heat resisting, tool and spring steels together with other alloying elements.
77
Basic solution is one which has pH value
Discuss
Answer & Solution
Answer: Option A
Solution:
Basic solution is one which has pH value Greater than 7
78
Neutral solution is one which has pH value
Discuss
Answer & Solution
Answer: Option C
Solution:
Neutral solution is one which has pH value Equal to 7
79
Acidic solution is one which has pH value
Discuss
Answer & Solution
Answer: Option B
Solution:
Acidic solution is one which has pH value Less than 7
80
The toughness of a material __________ when it is heated.
Discuss
Answer & Solution
Answer: Option B
Solution:
The toughness of a material decrease when it is heated.