Q. 1Which type of copper has good conductivity?
A. Hard drawn copper
B. pure annealed copper
C. copper containing traces of silicon
D. Induction hardened copper
Ans.: B
Q. 2 ___ is known as aluminium ore.
A. bauxite
B. hematite
C. alum
D. galena
Ans.: A
Q. 3 ____ variety of copper has good mechanical strength.
A. cast copper
B. soft copper
C. annealed copper
D. hard drawn copper
Ans.: D
Q. 4 Which of the following materials can be used for making cable sheaths?
A. copper
B. lead
C. Cast iron
D. silicon steel
Ans.: B
Q. 5 The_____ materials which exhibit the same elastic properties in all direction.
A. Isotropic
B. Visco elastic
C. Isentropic
D. all of the above
Ans.: A
Q. 6 Nickel is used in
A. bulb filaments
B. pressure sensitive elements
C. automatic voltage regulators
D. electrodes of thermionic valves
Ans.: D
Q. 7 Nichrome is an alloy of _____.
A. aluminium, tin and nickel
B. silver, copper and aluminium
C. nickel, chromium and iron
D. chromium, manganese and copper
Ans.: C
Q.8 German silver is an alloy of_____.
A. silver, manganese and nickel
B. copper, zinc and nickel
C. copper, silver and aluminium
D. silver, tin and tungsten
Ans.: B
Q. 9 The materials which undergo reversible deformation and exhibit elasticity are called as___.
A. Elastomers
B. plastic
C. Rubbers
D. all of the above
Ans.: A
Q. 10 Which of the following is strongest tension?
A. Stainless steel wire
B. brass wire
C. copper wire
D. aluminium
Ans.: A
Q. 11 Which of the following has zero temperature coefficient of resistance?
A. porcelain
B. clad metal
C. Manganin
D. carbon
Ans.: C
Q. 12 Constantan is consist of
A. copper and tungsten
B. silver and tin
C. copper and nickel
D. tungsten and silver
Ans.: C
Q. 13 Tin is used in which of the following?
A. transducers
B. contactors for starters
C. bulb filament
D. low current fuses
Ans.: D
Q. 14 Bakelite is
A. Incombustible
B. highly inflammable
C. high resistance
D. none of the above
Ans.: A
Q. 15 Which of the following is poor conductor of electricity?
A. Silver
B. copper
C. aluminium
D. carbon
Ans.: D