_________ is an example of piezoelectric material?
A. Glass
B. Quartz
C. Corrundum
D. Neoprene
Month: December 2018
Piezoelectric materials serve as a source of ____________ ?
Piezoelectric materials serve as a source of ____________ ?
A. resonant waves
B. musical waves
C. microwaves
D. ultrasonic waves
_____________is viscoelastic?
_____________is viscoelastic?
A. Cast-iron
B. Graphite
C. Rubber
D. Glass
Solder is an alloy of______________?
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 ?
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_______________?
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?
___________ is most commonly used for making magnetic recording tape?
A. Silver nitrate
B. Ferric oxide
C. Small particles of iron
D. Silicon-iron
__________ is the main constituent of glass?
__________ is the main constituent of glass?
A. Fe203
B. Si02
C. AI2O3
D. B2O3
Overhead telephone wires are made of_____________?
Overhead telephone wires are made of_____________?
A. aluminium
B. steel
C. ACSR conductors
D. copper
Which of the following variety of copper has the best conductivity ?
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