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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-10 section-1

Each section contains 100 MCQs on Engineering Materials .
91
Super conduction by metals is observed in the temperature range of
Discuss
Answer & Solution
Answer: Option A
Solution:
Super conduction by metals is observed in the temperature range of Below 10°K
92
Ferromagnetic alpha iron exists in temperature range of
Discuss
Answer & Solution
Answer: Option A
Solution:
alpha iron is a component of steel and cast iron, conferring Ferromagnetism.
the maximum solubility is at 727 °C
93
Gamma iron exits at following temperature
Discuss
Answer & Solution
Answer: Option D
Solution:
Gamma iron is an allotropic form of iron existing between the temperature 910°C and 1400°C and having a face-centered cubic lattice
94
Dow metal contains
Discuss
Answer & Solution
Answer: Option D
Solution:
Dow metal contains 90% magnesium and 9% aluminium with some copper
95
The material in which the atoms are arranged regularly in some directions but not in others, is called
Discuss
Answer & Solution
Answer: Option B
Solution:
The material in which the atoms are arranged regularly in some directions but not in others, is called Mesomorphous material
96
The property of a material due to which it breaks with little permanent distortion, is called
Discuss
Answer & Solution
Answer: Option A
Solution:
A material is brittle if, when subjected to stress, it breaks without significant plastic deformation. Brittle materials absorb relatively little energy prior to fracture
97
Which of the following is an amorphous material?
Discuss
Answer & Solution
Answer: Option D
Solution:
amorphous or non-crystalline solid is a solid that lacks the long-range order that is characteristic of a crystal
98
Which of the following is used for bearing liner?
Discuss
Answer & Solution
Answer: Option D
Solution:
It is a soft, white non-ferrous alloy which is used to provide a bearing surface.
Bearings are used in engines to support moving mechanical parts and protect them from frictional degradation.
Babbitt metal also has properties that help it reduce friction which makes it a good material for use in a plain bearing
99
White cast iron contains carbon in the form of
Discuss
Answer & Solution
Answer: Option C
Solution:
White cast iron contains carbon in the form of Cementite
100
Weld decay is the phenomenon found with
Discuss
Answer & Solution
Answer: Option D
Solution:
Weld decay is a form of intergranular corrosion, usually of stainless steels or certain nickel-base alloys, that occurs as the result of sensitization in the heat-affected zone during the welding operation