A. Aluminium carbide
B. Tungsten carbide
C. Nickel carbide
D. Iron carbide
Related Mcqs:
- Carbide tipped cutting tools are manufactured by powder metallurgy techniques and have a composition of_____________________?
A. 90% tungsten carbide and 10% cobalt
B. 70% aluminium oxide & 30% silica
C. 30% nickel, 15% chromium & 55% tungsten
D. 65% tungsten & 35% zirconium - Cemented carbide tools are not suitable for cutting___________________?
A. Aluminium
B. Brass
C. Cast iron
D. Steel - Non-ferrous alloys used for making cutting tools need not have high__________________?
A. Abrasion resistance
B. Toughness
C. Red hardness
D. Cutting speed - Which of the following is resistant to the action of both heat & chemicals ?
A. Borosilicate glass
B. Silica glass
C. Soda lime glass
D. None of these - For the irreversible reaction, Ca+ 2C = Ca C2 , Δ H°298 = – 60000 J . mole-1 . If a system initially containing 2 moles of calcium, 3 moles of carbon and 1 mole of calcium carbide is allowed to react to completion, the heat evolved at 298 K will be__________________?
A. 30,000 J
B. 60,000 J
C. 90,000 J
D. 2,40,000 J - Principal alloying elements of cast tool alloys which have very high wear resistance & high temperature strength are ?
A. Cobalt, chromium & tungsten
B. Cobalt, chromium & nickel
C. Molybdenum, tungsten & chromium
D. Cobalt, zirconium & molybdenum - _______________ is the hardest oxide and is hence used where high wear resistance at high temperature is required?
A. Beryllium
B. Zirconia
C. Alumina
D. Magnesia - Silicon percentage in acid resistant cast iron is about ___________________?
A. 4
B. 8
C. 14
D. 20 - Powder metallurgy technique is used in the production of ____________________ tools ?
A. Tungsten carbide
B. High carbon steel
C. High speed steel
D. Drilling - High speed steel tools retain their hardness upto a temperature of __________________ °C?
A. 500
B. 750
C. 900
D. 1100
