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ESE 2019 Technical (Materials Science : Quiz 1 )
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Question 1
Consider the following factors :
1) Number of turns of the coil
2) Length of the coil
3) Area of cross-section of the coil
4) Permeability of the core
On which of the above factors does inductance, depend ?
1) Number of turns of the coil
2) Length of the coil
3) Area of cross-section of the coil
4) Permeability of the core
On which of the above factors does inductance, depend ?
Question 2
Which among the following is an example for laminar composite?
Question 3
A roller follower in radial cams moves in direction:
Question 4
Turbine blades are normally made of:
Question 5
Statement (I): Ferrite cored coils are used in high frequency tuned circuits.
Statement (II): Ferrite cored coils have high Q as compared to iron-cored coils.
Statement (II): Ferrite cored coils have high Q as compared to iron-cored coils.
Question 6
Molydenum has a Body-Centered Cubic, (BCC) structure with an atomic radius of 1.36 Å. Then the lattice parameter for BCC molybdenum is:
Question 7
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 8
The ratio of ionic radii of Cations i.e., rc and that of Anions i.e. rA for stable and unstable ceramic crystal structure, is:
Question 9
A type I superconductor is
1) A conductor of infinite conductivity at all temperatures.
2) A conductor with very large conductivity below a critical temperature.
3) A material showing susceptibility = - 1 drastically reduced by a critical temperature.
4) A perfect conductor having conductivity drastically reduced by a critical current.
Which of these statements are correct?
1) A conductor of infinite conductivity at all temperatures.
2) A conductor with very large conductivity below a critical temperature.
3) A material showing susceptibility = - 1 drastically reduced by a critical temperature.
4) A perfect conductor having conductivity drastically reduced by a critical current.
Which of these statements are correct?
Question 10
Assertion (A): Magnetic susceptibility value of an antiferromagnetic substance at 0o K is zero.
Reason (R): At 0oK, atomic magnetic moments are frozen with magnetic dipoles pointing in random directions.
Reason (R): At 0oK, atomic magnetic moments are frozen with magnetic dipoles pointing in random directions.
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