_____________is viscoelastic?
A. Cast-iron
B. Graphite
C. Rubber
D. Glass
Solder is an alloy of______________?
A. Copper and aluminium
B. Tin and lead
C. Nickel, copper and zinc
D. Silver, copper and lead
In thermocouples which of the following pairs is commonly used ?
A. Copper-constantan
B. Aluminium-tin
C. Silver-german silver
D. Iron-steel
Carbon electrodes are not used in_______________?
A. Gls lamps
B. Electric arc furnace
C. Dry cells
D. Cinema projectors
___________ is most commonly used for making magnetic recording tape?
A. Silver nitrate
B. Ferric oxide
C. Small particles of iron
D. Silicon-iron
Which of the following variety of copper has the best conductivity ?
A. Induction hardened copper
B. Hard drawn copper
C. Pure annealed copper
D. Copper containing traces of silicon
Constantan contains_______________?
A. Silver and tin
B. Copper and tungsten
C. Tungsten and silver
D. Copper and nickel