1- Ceramic matrix composites are designed to overcome which of the following weaknesses ofceramics (two best answers):(a) compressive strength, (b) hardness, (c) hot hardness, (d) modulus of elasticity,(e) tensile strength,and (f) toughness?2- A facing operation is normally performed on which of the following machine tools (one bestanswer)?(a) drill press,(b) lathe,(c) milling machine,(d) planer.3- A cylindrical workpart 125 mm in diameter and 900 mm long is to be turned in an engine lathe.Cutting conditions are: v = 2.5 m/s, f= 0.3 mm/rev, and d = 2.0 mm. The (a) cutting time,and (b) metal removal rate are:a) 7.18 min and 1400 mm3/s7.85 min and 1500 mm/sb) 7.85 min and 1700 mm3/sc) 7.00 min and 1500 mm/sd)4- Which of the following materials are not composites.(d) Portland cement,(a) cemented carbide,(e) rubber in automobile tires,(b) phenolic molding compound, (c) plywood,and (f) wood?5- Which one of the following manufacturing processes will likely result in the worst surface finish?(a) cold rolling,6- Which one of the following plate metals produces the hardest surface on a metallic substrate:(a) cadmium,(b) grinding,(c) machining,(d) none of the mentioned(b) chromium,(с) соррer,(d) nickel, or(e) tin?

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1- Ceramic matrix composites are designed to overcome which of the following weaknesses of ceramics (two best answers): (a) compressive strength, (b) hardness, (c) hot hardness, (d) modulus of elasticity, (e) tensile strength, and (f) toughness?

1- Ceramic matrix composites are designed to overcome which of the following weaknesses of ceramics (two best answers): (a) compressive strength, (b) hardness, (c) hot hardness, (d) modulus of elasticity, (e) tensile strength, and (f) toughness?

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Processing of Polymer Matrix Composites

The polymer matrix composite is described as a composite material that contains some polymer in the form of either fibers or powder. Polymer matrix composites are also known in short as PMC's.

Question

1- Ceramic matrix composites are designed to overcome which of the following weaknesses of
ceramics (two best answers):
(a) compressive strength, (b) hardness, (c) hot hardness, (d) modulus of elasticity,
(e) tensile strength,
and (f) toughness?
2- A facing operation is normally performed on which of the following machine tools (one best
answer)?
(a) drill press,
(b) lathe,
(c) milling machine,
(d) planer.
3- A cylindrical workpart 125 mm in diameter and 900 mm long is to be turned in an engine lathe.
Cutting conditions are: v = 2.5 m/s, f= 0.3 mm/rev, and d = 2.0 mm. The (a) cutting time,
and (b) metal removal rate are:
a) 7.18 min and 1400 mm3/s
7.85 min and 1500 mm/s
b) 7.85 min and 1700 mm3/s
c) 7.00 min and 1500 mm/s
d)
4- Which of the following materials are not composites.
(d) Portland cement,
(a) cemented carbide,
(e) rubber in automobile tires,
(b) phenolic molding compound, (c) plywood,
and (f) wood?
5- Which one of the following manufacturing processes will likely result in the worst surface finish?
(a) cold rolling,
6- Which one of the following plate metals produces the hardest surface on a metallic substrate:
(a) cadmium,
(b) grinding,
(c) machining,
(d) none of the mentioned
(b) chromium,
(с) соррer,
(d) nickel, or
(e) tin?

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