Test: Performance Indices

# Test: Performance Indices

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## 10 Questions MCQ Test | Test: Performance Indices

Test: Performance Indices for Electrical Engineering (EE) 2023 is part of Electrical Engineering (EE) preparation. The Test: Performance Indices questions and answers have been prepared according to the Electrical Engineering (EE) exam syllabus.The Test: Performance Indices MCQs are made for Electrical Engineering (EE) 2023 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Performance Indices below.
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Test: Performance Indices - Question 1

### If the performance index of a phase lead compensator is (s+a)/ (s+b) and that of a lag compensator is (s+p)/(s+q), then which one of the following sets of conditions must be satisfied?

Detailed Solution for Test: Performance Indices - Question 1

Explanation: In phase lead compensator, zero is nearer to origin. In phase lag compensator, pole is nearer to origin.

Test: Performance Indices - Question 2

### The compensator Gc(s) =5(1+0.3s)/(1+0.1s) would provide a maximum phase shift of:

Detailed Solution for Test: Performance Indices - Question 2

Explanation: Maximum phase shift sin^(-1)⁡ [(1-α)/(1+α)] and sin^(-1)⁡[1/2] = 30°

Test: Performance Indices - Question 3

### The industrial controller having the best steady-state accuracy is:

Detailed Solution for Test: Performance Indices - Question 3

Explanation: The best steady state accuracy is of derivative controller and this is due to the fact that derivative controller is only affected by the steady state response not the transient response.

Test: Performance Indices - Question 4

Assertion (A): An on-off controller gives rise to self-sustained oscillation in output.
Reason (R): Location of a pair of poles on the imaginary axis gives to self-sustained oscillation is output.

Detailed Solution for Test: Performance Indices - Question 4

Explanation: An off-off controller is the initial version of the proportional controller and it gives the self-sustained oscillations and location of poles on the imaginary axis gives the self-sustained oscillations.

Test: Performance Indices - Question 5

Consider the following statement:
A proportional plus derivative controller
1. Has high sensitivity
2. Increases the stability of the system
3. Improves the steady state accuracy

Which of these statements are correct?

Detailed Solution for Test: Performance Indices - Question 5

Explanation: A proportional plus derivative controller has the following features as it adds open loop zero on the negative real axis, peak overshoot decreases, bandwidth increases and rise time decreases.

Test: Performance Indices - Question 6

Which one of the following compensation is required for improving the transient response of the system?

Detailed Solution for Test: Performance Indices - Question 6

Explanation: For increasing or improving the transient response derivative controller is used and which is the phase lead compensation.

Test: Performance Indices - Question 7

Pneumatic controller are :

Detailed Solution for Test: Performance Indices - Question 7

Explanation: Pneumatic controllers are fire and explosion proof operation as they require air and gas fuel for its operation.

Test: Performance Indices - Question 8

Hydraulic controller :

Detailed Solution for Test: Performance Indices - Question 8

Explanation: Hydraulic controller must have no leakage and also it requires high torque and high speed operation due to high density of the controller.

Test: Performance Indices - Question 9

Electronic Controller :

Detailed Solution for Test: Performance Indices - Question 9

Explanation: Flexible in all sense as it does not require heavy components or extra torque or high speed operations.

Test: Performance Indices - Question 10

A plant controlled by a proportional controller. If a time delay element is introduced in the loop its :

Detailed Solution for Test: Performance Indices - Question 10