Latest Electrical Engineering Materials Multiple choice Questions and Answers pdf

31.    Constantan contains
(a)     silver and tin
(b)     copper and tungsten
(c)    tungsten and silver
(d)    copper and nickel
Ans: d

32.    Which of the following is the poorest conductor of electricity ?
(a)     Carbon
(b)     Steel
(c)     Silver
(d)     Aluminium
Ans: a

33    ______ has zero temperature co-efficient of resistance.
(a)     Aluminium    
(b)     Carbon
(c)     Porcelain
(d)     Manganin
Ans: d

34.    Piezoelectric materials serve as a source of _____ .  
(a)     resonant waves
(b)     musical waves
(c)     microwaves    
(d)     ultrasonic waves
Ans: d

35.    In thermocouples which of the following pairs is commonly used ?
(a)     Copper-constantan
(b)     Aluminium-tin
(c)    Silver-German silver
(d)    Iron-steel
Ans: a

36    is viscoelastic.
(a)     Cast-iron
(6)     Graphite
(c)     Rubber
(d)     Glass
Ans: c

37.    Carbon electrodes are not used in
(a)    GLS lamps
(b)    electric arc furnace
(c)    dry cells
(d)    cinema projectors
Ans: a

38.    Solder is an alloy of
(a)    copper and aluminium
(b)    tin and lead
(c)    nickel, copper and zinc
(d)    silver, copper and lead
Ans: b

39    ______ is most commonly used for making magnetic recording tape  
(a)     Silver nitrate
(b)     Ferric oxide
(c)    Small particles of iron
(d)    Silicon-iron
Ans: b

40.   Overhead telephone wires are made of
(a)     aluminium    
(b)     steel
(c)     ACSR conductors
(d)     copper
 Ans: b

Read More Questions:
Electrical Engineering Materials MCQs Part1
Electrical Engineering Materials MCQs Part2
Electrical Engineering Materials MCQs Part3
Electrical Engineering Materials MCQs Part4
Electrical Engineering Materials MCQs Part5
Electrical Engineering Materials MCQs Part6
Electrical Engineering Materials MCQs Part7
Electrical Engineering Materials MCQs Part8
Electrical Engineering Materials MCQs Part9
Electrical Engineering Materials MCQs Part10