A. Are exemplified by clay and mica
B. Are poor electrical conductors due to lack of free electrons
C. Never exhibit polymorphism
D. All A., B. and C.
Related Mcqs:
- Ceramic materials fabrication cannot be done by__________________?
A. Welding
B. Slip casting
C. Extrusion
D. Plastic pressing - Which of the following is not used as the ceramic material in „cermets‟?
A. Silicides
B. Oxides
C. Carbides
D. Nitrides - Ceramic materials are____________________?
A. Organic in nature
B. Stronger in compression than in tension
C. Always amorphous in nature
D. Always bad heat conductors - Ceramic recuperators are generally made of_________________?
A. Silicon carbide
B. Calcium carbide
C. Fireclay bricks
D. High alumina bricks - Karbate is____________________?
A. A mixture of iron dust and saw dust
B. Carbon impregnated with resin (usually Bakelite)
C. An acid resistant material
D. Both B. and C. - Brass is an alloy of____________________?
A. Nickel and tin
B. Copper and zinc
C. Tin and lead
D. Copper, nickel and zinc - Constantan is an alloy of____________________?
A. Cu (55%) & Sn (45%)
B. Cu (55%) & Ni (45%)
C. Pt (95%) & Rh (10%)
D. Fe (80%) & Ni (20%) - The impure iron (pig iron) that is tapped out from blast furnace contains about _____________ percent carbon?
A. 0.2
B. 2
C. 4
D. 8 - The addition of antimony in tin-based alloys improves its________________?
A. Rupture strength and hot hardness
B. Impact strength and bonding strength
C. Deformation resistance
D. Wear resistance - Carbon percentage in medium carbon steel is around__________________?
A. 0.1 to 0.35
B. 0.35 to 0.5
C. 0.8 to 1.4
D. 1 to 1. 5
