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Production and Industrial Engineering Question set 2

Production and Industrial Engineering Question set 2

Question:-

Circuit shown below is a voltage reference source with an output of 10 V.

Here Zener diode has a breakdown voltage of 5.6 V. What will be the value of R₂/R₁ ? Assume the voltage regulation will be within specifications if the Zener diode is biased between 1 mA - 1.2 mA.

Option (A)

0.786

Option (B)

4.345

Option (C)

3.405

Option (D)

0.294

Correct Option:

A

Question Solution:

=
=> =
therefore, = = 0.786

Question:-

Section - I (Technical)
Question No. 1 to Question No. 25 carry 1 mark each.

The output current of an pn junction diode used as a solar cell can be given by
I_D =
The short circuit current is defined as I_sc = I_D when V_D = 0 and the open-circuit voltage is defined as V_oc = V_D when I_D = 0. Then the values of I_sc and V_oc are respectively:

Option (A)

0.7 A, 2.3 V

Option (B)

0.2 A, 1.121 V

Option (C)

0.2 A, 0.75 V

Option (D)

0.75 A, 0.2 V

Correct Option:

C

Question Solution:

Put V_D = 0
I_sc=
=> I_sc=0.2 A
PutI_D=0
0=
=> =
=> =
=29.017
therefore, V_D=0.0259 x 29.017
=> V_OC=0.75 Volt

Question:-

Neglecting the effect of piezo resistive effect in a strain gauge. The gauge factor of a gauge is found to be 2. Find the poissoins ratio of the strain gauge.

Option (A)

0.5

Option (B)

0.6

Option (C)

2

Option (D)

- 0.5

Correct Option:

A

Question Solution:

G.F. = 2
1 + 2 υ=G.F.
therefore, υ=
= = 0.5

Question:-

Pressure is measured by a U-Tube manometre with one leg having a fixed pressure of 1.2N/m² and the other leg is used to sense the input pressure. If the sensitivity of the monometer is 20 m³/N then find the presses applied to the other arm if the height of the mercury changes by 2 m.

Option (A)

1.2 N/m²

Option (B)

1.3 N/m²

Option (C)

1.4 N/m²

Option (D)

1.5 N/m²

Correct Option:

B

Question Solution:

S=
20=
ΔP=
P₂ - P₁=0.1
therefore, P₂=0.1 + P₁
=0.1 + 1.2 = 1.3 N/m²