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Electrical and Electronics Engineering Materials EEEM May 2019 EE/EEE/Diploma Paper

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Electrical and Electronics Engineering Materials EEEM May 2019 EE/EEE/Diploma Paper

                  SECTION-A

Q1. Do as directed.                                                                                                             15×1=15

a. All metals are conductors of electricity (T/F)
b. Nichrome is an alloy of nickel and chromium (T/F)
c. The conductivity of semiconductors is usually high (T/F)
d. Mica is not affected by oils (T/F)
e. Soft magnetic materials are used for making permanent magnets (T/F)
f. Thermocouple is based on ____________ Effect.
g. The two junctions of a thermocouple are kept at _________ temperature.
h. Outer frame of D.C machine is made up of ___________
i. The armature core of a D.C machine is made of ______________
j. ACSR is abbreviated as ______________

                 SECTION-B

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

i. What do you mean by thermocouple?
ii. Discuss the properties of Bakelite.
iii. How materials are classified on the basis of energy band?
iv. Discuss the properties of fuse material.
v. Explain construction and working of a Bimetal.
vi. Name the various parts of transformer and mention the name of various materials used to construct these parts.
vii. Compare between Copper and Aluminum.

                  SECTION-C

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

a. Explain the working and construction of H.R.C fuse with neat sketch.
b. List the materials used for construction of following parts:
i) commutator ii) Transformer core iii) Yoke of D.C machine iv) Armature and Field Winding
c. State and explain main factors which decide selection of an insulating material for particular purpose.
d. Explain properties and applications of i) Steel ii) PVC

Electrical and Electronics Engineering Materials EEEM May 2019 EE/EEE/Diploma Paper

Properties of Bakelite.

Classified Materials on the basis of energy band.

Properties of fuse material.

Construction and working of a Bimetal.

Related Post

Compare between Copper and Aluminum.

Electrical and Electronics Engineering Materials EEEM May 2019 Paper Click Here

Electrical and Electronics Engineering Materials EEEM May 2019 EE/EEE/Diploma Paper

Main factors which decide selection of an insulating material for particular purpose.

Properties and applications of

i) Steel

ii) PVC

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