A. High alumina ceramic
B. Metallic carbides
C. Corundum
D. Carborundum
Related Mcqs:
- Spark plugs, ignition tubes and electrodes are made of nickel ____________ alloys?
A. Beryllium
B. Manganese
C. Copper
D. Iron - Bush bearings are made of______________________?
A. Mild steel
B. Phosphorous bronze
C. White metal alloys
D. None of these - Carbon is present in the combined form (carbide) in case of______________________?
A. Pig iron
B. Steel
C. Ferroalloys
D. All A., B. & C. - The crystal structure of most of the common metals is_____________________?
A. Orthorhombic
B. Cubic
C. Hexagonal
D. None of these - Inconel is an alloy of_________________?
A. Tin, zinc and nickel
B. Iron, nickel and chromium
C. Copper and nickel
D. Copper and tin - Nickel base alloys with ______________ are known as monel metal?
A. Zinc
B. Tin
C. Copper
D. Molybdenum - Very high sulphur in pig iron makes ___________________?
A. Its casting unsound
B. Its hard and machinable
C. Its brittle and malleable
D. All A., B. & C. - Corrosion resisting properties of cast iron are significantly improved by the addition of 12 – 15% of___________________?
A. Tungsten
B. Vanadium
C. Silicon
D. All A., B. & C. - Brass tubes are used in the manufacture of tubes of evaporators used in sugar and salt industries, mainly because of its ______________________?
A. High co-efficient of thermal expansion
B. Low thermal conductivity
C. High corrosion resistance
D. All A., B. and C. - Pick out the wrong statement?
A. Metal/alloys having hexagonal crystal lattice structure are less malleable than those having
cubic crystal lattice structure
B. Metal/alloys having body centred cubic (bcc) crystal lattice structure is stronger & less ductile
than those having face centred cubic (fcc) crystal lattice structure
C. Tungsten has a body centred cubic (bcc) crystal lattice structure
D. Both ferritic & austenitic stainless steel has a face centred cubic (fcc) crystal structure
