Explore topic-wise MCQs in Manufacturing Engineering.

This section includes 18 Mcqs, each offering curated multiple-choice questions to sharpen your Manufacturing Engineering knowledge and support exam preparation. Choose a topic below to get started.

1.

With an increase in temperature, the resistance of a semiconductor ____________

A. increases
B. decreases
C. remains Constant
D. first increases and then decreases
Answer» C. remains Constant
Discussion
2.

If a copper wire of 10 m length having 0.44mm diameter has resistance of 2 Ohm, then what will be the specific resistance (in Ohm-m)?

A. 1.520 × 10-8
B. 3.041 × 10-8
C. 1.520 × 10-6
D. 1.520 × 10-5
Answer» C. 1.520 × 10-6
Discussion
3.

If a copper wire of 200 m length having 0.44mm diameter has resistance of 20 Ohm, then find its specific resistance (in Ohm-m).

A. 1.520 × 10-8
B. 1.520 × 10-7
C. 1.520 × 10-6
D. 1.520 × 10-5
Answer» B. 1.520 × 10-7
Discussion
4.

What is the energy gap (Eg) of a metal?

A. Eg < 3 ev
B. Eg < 1 ev
C. Eg > 1 ev
D. Eg > 3 ev
Answer» C. Eg > 1 ev
Discussion
5.

What is the energy gap (Eg) of an insulator?

A. Eg < 3 ev
B. Eg < 1 ev
C. Eg < 0 ev
D. Eg > 3 ev
Answer» E.
Discussion
6.

What is the resistivity of bismuth (in Ohm-m) at room temperature?

A. 1.29 × 10-6
B. 1.29 × 10-3
C. 1.29 × 10-5
D. 1.29 × 10-9
Answer» B. 1.29 × 10-3
Discussion
7.

What is the resistivity of iron (in Ohm-m) at room temperature?

A. 9.71 × 10-2
B. 9.71 × 10-8
C. 9.71 × 10-5
D. 9.71 × 10-9
Answer» C. 9.71 × 10-5
Discussion
8.

What is the resistivity of silver (in Ohm-m) at room temperature?

A. 1.59 × 10-2
B. 1.59 × 10-3
C. 1.59 × 10-5
D. 1.59 × 10-9
Answer» E.
Discussion
9.

With an increase in the mean free path of electrons, materials conductivity ____________

A. increases
B. decreases
C. remains constant
D. first increases and then decreases
Answer» B. decreases
Discussion
10.

Which of the following is the de Broglie’s equation (λ = wavelength, v = velocity, m = mass, h = Planck’s constant)?

A. λ = h/mv
B. λ = h/m
C. λ = h/v
D. λ = mv/h
Answer» B. λ = h/m
Discussion
11.

RESISTANCE_OF_A_10_METER_LONG_COOPER_WIRE_IS_EQUAL_TO_2_OHM._ITS_DIAMETER_IS_0.44MM._ITS_SPECIFIC_RESISTANCE_IN_OHM-M_IS_EQUAL_TO_:?$

A. 1.520 * 10<sup>-8</sup>
B. 3.041* 10<sup>-8</sup>
C. 1.520 * 10<sup>-6</sup>
D. 1.520 * 10<sup>-5</sup>
Answer» C. 1.520 * 10<sup>-6</sup>
Discussion
12.

With an increase in temperature of a semiconductor, resistance of semiconductor.$

A. Increases
B. Decreases
C. Remains Constant
D. None of the mentioned
Answer» C. Remains Constant
Discussion
13.

Resistance of a 200 meter long cooper wire is equal to 20 ohm. Its diameter is 0.44mm. Its specific resistance in ohm-m is equal to ?

A. 1.520 * 10<sup>-8</sup>
B. 1.520 * 10<sup>-7</sup>
C. 1.520 * 10<sup>-6</sup>
D. 1.520 * 10<sup>-5</sup>
Answer» B. 1.520 * 10<sup>-7</sup>
Discussion
14.

Which of the following equation may represent the property of metal, if Eg stands for energy gap in electron volt?

A. E<sub>g</sub> < 3
B. E<sub>g</sub> < 1
C. E<sub>g</sub> > 1
D. E<sub>g</sub> > 3
Answer» C. E<sub>g</sub> > 1
Discussion
15.

For insulators value of Energy gap in electron Volt i.e. eV ranges as :

A. E<sub>g</sub> < 3
B. E<sub>g</sub> < 1
C. E<sub>g</sub> > 1
D. E<sub>g</sub> > 3
Answer» E.
Discussion
16.

Resistivity of silver in ohm-m has an order of :

A. 10<sup>-2</sup>
B. 10<sup>-3</sup>
C. 10<sup>-5</sup>
D. 10<sup>-9</sup>
Answer» E.
Discussion
17.

With an increase in the mean free path of a crystal, conductivity of a crystal.

A. Increases
B. Decreases
C. Remains constant
D. None of the mentioned
Answer» B. Decreases
Discussion
18.

Which of the following is the correct equation for De Broglie’s wavelength λ?

A. λ=h /mv
B. λ=h /m
C. λ=h /v
D. λ=mv/ h
Answer» B. ‚âà√≠¬¨‚Ñ¢=h /m
Discussion