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ESE EC 2018 Achiever Study Plan: Material Science Quiz 3
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Question 1
Consider the following statements regarding electrical properties of ceramic materials :
1) They are practically non-conductors at lower temperatures.
2) Ordinary glass and silicates in molten state are dependable as electrical nonconductors.
3) They offer high resistance to current transmission and get heated soon when conducting electric current.
Which of the above statements are correct?
1) They are practically non-conductors at lower temperatures.
2) Ordinary glass and silicates in molten state are dependable as electrical nonconductors.
3) They offer high resistance to current transmission and get heated soon when conducting electric current.
Which of the above statements are correct?
Question 2
If primary and secondary windings of core-type single-phase transformer are wound on nonmagnetic core, then the
1) efficiency of the transformer will decrease
2) efficiency of the transformer will increase
3) transformer regulation will increase
4) transformer regulation will decrease
Which of the above possibilities are realized?
1) efficiency of the transformer will decrease
2) efficiency of the transformer will increase
3) transformer regulation will increase
4) transformer regulation will decrease
Which of the above possibilities are realized?
Question 3
The packing factor 0.74 is for:
i. Hexagonal Close Packed Structure
ii. Face Centered Cubic Structure
iii. Body-Centered Cubic Structure
i. Hexagonal Close Packed Structure
ii. Face Centered Cubic Structure
iii. Body-Centered Cubic Structure
Question 4
Dislocations in edges and screws in materials is a type of:
Question 5
Which among the following Paramagnetic materials become more magnetic on cooling?
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May 17ESE & GATE EC
