21. Lead is widely used in-
A. Transformers
B. Switch gears
C. Batteries
D. Galvanized pipes
22. Phenol formaldehyde is-
A. a rubber
B. an elastomer
C. a thermoplastic material
D. a thermoset polymer
23. What is the Coordination Number for FCC crystal structure-
Read More- Physical Quantities and Measurements
A. 4
B. 8
C. 12
D. 16
24. Addition of magnesium to Cast Iron increases its-
A. ductility and strength in tensile
B. hardness
C. creep strength
D. corrosion resistance
25. Addition of vanadium to steel results in improvement of-
A. hardenability
B. fatigue strength
C. heat treatability by quenching
D. resistance to oxidation at elevated temperature