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Electrical and Electronics Engineering Materials EEEM May 2018 EE/EEE/Diploma Paper

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Electrical and Electronics Engineering Materials EEEM May 2018 EE/EEE/Diploma Paper

                  SECTION-A

Q1. Fill in the blanks. 15×1=15
a. __________ materials have four electrons in valance shell of their atoms.
b. In insulators conduction band is ________________
c. Resistivity is also called ________________
d. Carbon has a _______________ temperature coefficient of resistance
e. Melting point of silver is _______________
f. Maximum operating temperature of cotton is __________________
g. Base material in oil varnishes is ________________ oil
h. _______________ has high permeability
i. The contents of carbon in tungsten steel is ________________
j. The core of a transformer is always _________________
k. Brass is an alloy of _________________
l. _________ is found to be most suitable for constructing armature core.
m. Bronze contains _________copper and ________ Tin.
n. ____________ is very much useful for measuring high temperature.
o. ____________ is used to form cable sheaths.

                 SECTION-B

Q2. Attempt any five questions.                                                                    5×6=30

i. Write any five applications of copper and steel
ii. How do you classify Electrical Engineering Material?
iii. What are Bi-Metals? Mention their uses
iv. Silver is a good conductor then copper .justify your answer
v. Fuse material should have low melting point, why?
vi. What is Mica? Write any three uses of Mica
vii. Brushes of a DC machine are not of wood, why?
viii. How N type semiconductors are found?

                  SECTION-C

Q3. Attempt any three questions.                                                      3×10=30

a. Compare copper ,Aluminum and Gold
b. Classify the materials on basis of their Energy bands
c. What is superconductivity ?Explain the application of superconductivity materials
d. Define the following
i) Hysteresis loop ii) permeability
e. Write short note on (any two)
i. Eddy current loss
ii. PVC
iii. ACSR

Electrical and Electronics Engineering Materials EEEM May 2018 EE/EEE/Diploma Paper

 __________ materials have four electrons in valance shell of their atoms.

In insulators conduction band is ________________

Resistivity is also called ________________

Carbon has a _______________ temperature coefficient of resistance

Melting point of silver is _______________

Maximum operating temperature of cotton is __________________

Base material in oil varnishes is ________________ oil

 _______________ has high permeability

The contents of carbon in tungsten steel is ________________

The core of a transformer is always _________________

Brass is an alloy of _________________

_________ is found to be most suitable for constructing armature core.

Bronze contains _________copper and ________ Tin.

 ____________ is very much useful for measuring high temperature.

Related Post

____________ is used to form cable sheaths.

Electrical and Electronics Engineering Materials EEEM May 2018 EE/EEE/Diploma Paper Click Here

Applications of copper and steel

Classify Electrical Engineering Material.

Bi-Metals and their uses

Silver is a good conductor then copper 

Fuse material should have low melting point.

Mica and three uses of Mica
 

Brushes of a DC machine are not of wood,

N type semiconductors.

Electrical and Electronics Engineering Materials EEEM May 2018 Paper Click Here

Electrical and Electronics Engineering Materials EEEM May 2018 EE/EEE/Diploma Paper

Compare copper ,Aluminum and Gold

Types the materials on basis of their Energy bands

Superconductivity and  application of superconductivity materials

Hysteresis loop 

PVC

ACSR

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