Which one of the following metals has the lowest density: (a) aluminum, (b) magn

Question

Which one of the following metals has the lowest density: (a) aluminum, (b) magnesium, (c) tin, or (d) titanium?() Which of the following metals has the highest density: (a) gold, (b) lead, (c) platinum, (d) silver, or (e) tungsten?() Traditional brass is an alloy of which of the following metallic elements (two correct answers): (a) aluminum, b) copper, (c) gold, (d) tin, (e) zinc?() Which of the following contains significant amounts of aluminum oxide (three correct answers): (a) alumina, (b), (c) corundum, (d) feldspar, (e) f) quartz, (g) sandstone, and (h) silica? () Which of the following ceramics are commonly used as abrasives in grinding wheels (two best answers): (a) aluminum oxide, (b) calcium oxide, (c) carbon monoxide, (d) silicon carbide, or (e) silicon dioxide? () Properties and characteristics of the glass ceramics include which of the following (two best answer): (a) efficiency in processing, (b) electrical conductor, (c) high thermal expansion, or (d) strong, relative to other ceramics?() The leading commercial synthetic rubber is which one of the following (a) butyl rubber, (b) isoprene rubber, (c), (d) polyurethane, (e) styrene-butadiene rubber, or (f) thermoplastic elastomers?() Which one of the following reinforcing geometries offers the greatest potential for strength and stiffness improvement in the resulting composite material: (a) fibers, (b) flakes, (c) particles, or (d) infiltrated phase? () Which of the following materials are used as fibers in fiber-reinforced plastics (four best answers): (a) aluminum oxide, (b) boron, (c) cast iron, (d) E-glass, (e) epoxy, (f) Kevlar 49, (g) polyester, and (h) silicon? () Which of the following metals are used as the matrix material in fiber-reinforced MMCs (two best answers): (a) aluminum, (b) copper, (c) iron, (d) magnesium, and (e) zinc? () Which of the following metals are used as the matrix metals in nearly all WC cemented carbides and TiC cermets (two correct answers): (a) aluminum, (b) chromium, (c) cobalt, (d) lead, (e) nickel, (f) tungsten, or (g) tungsten carbide? () 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, or (f) toughness? () Which of the following polymer types are most commonly used in polymer matrix composites: (a) elastomers, (b) thermoplastics, or (c) thermosets? ()

Explanation / Answer

13

The highest density is of Tin among all of these

14

The highest density is of Platinum

15

Brass is an alloy Zinc

16

The Answer is

Bauxite

Alumina

Corundum

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