1-Which of the following statements INCORRECTLY explain the label in the figure about LVDT working principles? a. Secondary coils are connected in series in such a way that their output is opposing each other. b. Constant DC voltage input to primary coil. c. Displacement moves ferrous rod from central position. d. The difference of the output voltage between the two secondary voltage. ========== 2- Explain the working principle of the measurement system in the figure below. i. Force input that is supplied to the sensor is processed to give the response in the form of raw output signal. ii. Signal conditioner manipulated the weak signal to give a conditioned input. iii. Analog or digital

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1-Which of the following statements INCORRECTLY explain the label in the figure about LVDT working principles?

a.

Secondary coils are connected in series in such a way that their output is opposing each other.

b.

Constant DC voltage input to primary coil.

c.

Displacement moves ferrous rod from central position.

d.

The difference of the output voltage between the two secondary voltage.

==========
2-

Explain the working principle of the measurement system in the figure below.
i. Force input that is supplied to the sensor is processed to give the response in the form of raw output signal.
ii. Signal conditioner manipulated the weak signal to give a conditioned input.
iii. Analog or digital indicator display the unit that gives output reading of quantity being measured.
iv. Measured value is compared with the input value for further action.

a.

ii, iii and iv only.

b.

i, ii and iv only.

c.

i, ii and iii only.

d.

All the answers.
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3-

The following statements, explain the working principle of an open-loop control system.
i. Output has no bearing on the given input.
ii. The open loop system is generally less accurate than the close loop system.
iii. The system compares the error signal between actual output and desired output.
iv.The accuracy, sensitivity and non-linearity of the system can be improved by feedback elements.

a.

All the answers.

b.

i, ii and iii only.

c.

i and iii only.

d.

i and ii only.
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4-

Explain the working principles of an operational amplifier.
i. An op-amp has two inputs, inverting and non-inverting.
ii. An op-amp is a high gain DC amplifier.
iii. The arrangements of connections made to the input determine the type of output.
iv. An op-amp contains a lot of transistors.

a.

i, ii and iii only.

b.

i, ii and iv only.

c.

i, iii and iv only.

d.

All the answers.