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BARC ME 2018 Engineering Materials Nuclear Quiz 2

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Question 1

Which of the following belong to thermoplastics?
[1]. Natural resins
[2]. Phenol formaldehyde
[3]. Polystyrene
[4]. Poly vinyl chloride

Question 2

For resultant grain boundaries to be called as high angle boundaries, the minimum mis orientation angle between the grains should be

Question 3

Match the lists I and II using code given below
List - I
A) Car dash board
B) Aircraft windows
C) Conduit pipes
D) Bearings and gear
List – II
1. Polyvinylchloride (PVC)
2. TEFLON
3. Polyacrylonitrile
4. Polymethylmethacrylate

Question 4

Match list I with list II and select the correct answer using the codes. Given below the lists.
List - I (Match property)
A) Malleability
B) Hardness
C) Resilience
D) Isotropy
List- II (Related to)
1. Wire drawing
2. Impact loads
3. Cold rolling
4. Indentation
5. Direction

Question 5

Which of the following methods are used for protection against fracture?
[1]. Avoid sharp corners and notches in the part to eliminate points of stress concentration
[2]. Provide better finish to the surface by polishing
[3]. Introduce residual tensile stresses on the surface
Which of these statements are correct:
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