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DFCCIL EE Material System Quiz-1

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Question 1

A good insulating material should not posses

Question 2

Specific resistance of copper fuse wire will be around:

Question 3

Match List-I with List-II and select the correct answer using the code given below the Lists:
A) High conductivity materials
B) High resistivity materials
C) Metal for lightly loaded contacts
D) Materials for bimetallic strip
1) Tungsten, Carbon
2) Platinum,Molybednum
3) Aluminium, Copper
4) Iron, Nickel, Constantan

Question 4

The insulating material for cables should have

Question 5

How many classes of insulating material are there-

Question 6

The resistivity of conductor is a function of temperature because:
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Jul 12AE & JE Exams