Electrical Materials MCQs Part-1

Electrical Materials MCQs

1. Material science deals with_______.

a. Solids and vapours

b. Gases abd Liquids

c. Molten metals

d. Solid materials

 

2. Which of the following is/are mechanical property______.

a. Susceptibility and retentivity

b. Proof of resilience and creep

c. Passivity and pH-value

d. Specific heat abd thermal fatigue

 

3. A unit cell is________.

a. An agglomerated block of crystal

b. A cube containing the largest number of atoms

c. The basic building block of crystal

d. The smallest group of atoms which when regularly repeated forms the crystal

 

4. Assertion (A): A unit cell is analogous to a brick used in the building construction.

Reason (R) : A unit cell is defined as the basic structural part in the composition of materials.

a. A is false but R is true

b. A is but R is false

c. Both A and R are true but R is not the correct explanation of A

d. Both A and R are true but R is  the correct explanation of A

 

5. Consider the following statements:

1. The crystal directions of a family must be parallel to one another

2. Crystal directions and crystal plane are denoted by the Miller indices

3. In cubic crystals, a crystal plane and a crystal direction normal to it have different indices

4. The effective number of lattice points in unit cell is highest in case of face centered cubic space lattice

Which of the statements given above is/are correct?

a. 2, 3 and 4

b. 2 and 4

c. 1, 2 and 3

d. 4 only

 

6. The number of Bravais space lattices with two lattice points are_______.

a. 5

b. 4

c. 3

d. 2

 

7. The atomic diameter of an FCC crystal (lattice parameter is a) is_________.

a. `\frac{a} {2}`

b. `\frac{a\sqrt{3}}{4}`

c. `frac{a\sqrt{2}}{4}`

d.`frac{a\sqrt{2}}{2}` 

 

8. If there are six electrons in the d orbital of a transition metal, the number of unpaired electrons are______.

a. 0

b. 5

c. 6

d. 4

 

9. The thermal expansion of materials arises from______.

a. Asymmetry of potential energy curve

b. Weak bonds

c. Thermal vibrations

d. Strong bonds

 

10. Hydrogen bonds are stronger  than_______.

a. Covalent bonds

b. Ionic bonds

c. Metallic bonds

d. Vander walls bonds

 

11. The miller indices of a plane are proportional to______.

a. Interplaner spacing

b. The intercepts of the planes on the coordinate axes

c. The square of unit cell dimensions

d. The reciprocal of numerical parameters of the intercepts

 

12. A material having different properties in different directions is known as_______.

a. Metal

b. Crystalline

c. Anisotropic

d. Isotropic

 

13. What is the Miller indices (h, k, l) of a plane whose intercepts are a, b/2 and 3c on x, y and z axes respectively in a simple cubic unit cell?

a. (3, 1, 6)

b. (3, 6, 1)

c. (6, 3, 1)

d. (1, 3, 6)

 

14. A metal which possesses body centered tetragonal structure is______.

a. Nickel

b. Aluminium

c. Tin

d. Vanadium

 

15. Which of the following is not a member of ceramic family?

a. Lime

b. Ferrites

c. Garnet

d. Bainite