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# Control System MCQ

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- 01st May, 2021
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## Control Systems MCQ Test

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**Control system MCQ test**that are designed for professionals like you to crack you interviews. You can take this**Control system online test**before appearing to you real interview. This**Control system quiz**there are around 30+ multiple choice questions on Control system with four options.### 1) In the cauer-2 form of LC network---------is series element and --------is shunt element respectively?

### 2) Lowest critical frequency is due to pole and it may be present at the origin or nearer to the origin, then the type of network is

### 3) Lowest critical frequency is due to zero and it may be present at the origin or nearer to the origin, then the type of network is

### 4) Poles and zeros are arranged alternatively on negative real axis, then type of network is/are

### 5) A box which tells the effect of inputs on control sub system is known as

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### 6) Which system is also known as automatic control system?

### 7) Advantages of open loop control system is/are

### 8) Which of the following are the disadvantages of a closed loop control system?

### 9) The output of the system has an effect upon the input quantity, then the system is a

### 10) By using which of the following elements, mechanical translational systems are obtained?

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### 11) Force balancing equation of a mass element is (where, x = displacement)

### 12) Which of the following is/are the advantages of a closed loop control system?

### 13) Force balancing equation of a dash-pot element is (where, x = displacement)

### 14) Force balancing equation for elastic element (K) is (where, x = displacement)

### 15) Which of the following is/are the disadvantages of an open loop control system?

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### 16) Which of the following is the analogous quantity for mass element in force-voltage analogy?

### 17) Electrical analogous quantity for spring element (K) in force-voltage analogy is

### 18) In force-current analogy, electrical analogous quantity for displacement (x) is

### 19) Electrical analogous quantity for dash-pot in force-current analogy is

### 20) If a circuit consists of two mass elements, two spring elements and four friction elements. Find the order of transfer function?

### 21) If two blocks having gains A and B respectively are in series connection, find the resultant gain using block diagram reduction technique?

### 22) In signal flow graph input node is node having only------------

### 23) When writing a transfer function which of the following loops are not valid loops?

### 24) Which of the following is the electrical analogous element for displacement in force-voltage analogy?

### 25) If two blocks having gains A and B respectively are in parallel connection, find the resultant gain using block diagram reduction technique?

### 26) Which of the following is/are the characteristics of negative feedback control system?

### 27) Accurate and reliable output is possible with which of the following system?

### 28) Which of the following combinations is/are correct electrical analogous elements in force-current analogy?

### 29) Which of the following is/are the example of actuator?

### 30) In signal flow graph output node is node having only------------

### 31) Adding a pole to a system transfer function in terms of compensator represents a --------------- compensator ?

### 32) A linear time invariant system, initially at rest when subjected to a unit step input gave response c(t) = te-t (t ≥ 0). The transfer function of the system is

### 33) Given the transfer function of a system. Which of the following characteristics does it have?

### 34) The unit impulse response of second order system is 1/6 * e-0.8t sin(0.6t). THen the natural frequency is

### 35) Which of the following transfer functions represent under damped second order systems?

### 36) The open loop transfer function of a unity feedback control system is given by G(s) = k/s(s+1). If gain k is increased to infinity, then damping ratio will tend to become

### 37) Consider a network function H(s) = 2(s+3)/{(s+2)(s+4)}. What is the steady state response due to step input?

### 38) The system function N(s) = V(s)/I(s) = (s+3)/(4s+5). The system is initially at rest. If the excitation i(t) is a unit step, which of the following is the initial value?

### 39) The open loop transfer function for unity feedback system is given by 5(1+0.1s) / (s(1+5s)(1+20s)) Find the steady state error for a step input of magnitude 10 is equal to

### 40) The input-output relationship of a linear time invariant continuous time system is given by r(t) = d²c(t)/dt² + 3 dc(t)/dt + 2 c(t) Where r(t) and c(t) are input and output respectively. What is the transfer function of the system equal to?

### 41) The open loop transfer function for unity feedback system is given by Find the steady state error for a ramp input of magnitude 10?

### 42) The system function N(s) = V(s)/I(s) = (s+3)/(4s+5). The system is initially at rest. If the excitation i(t) is a unit step, which of the following is the final value?

### 43) Find the Laplace transform for sinωt?

### 44) Given a unity feedback system with G(s) = k/s(s+4), the value of k for damping ratio of 0.5 is

### 45) The type number of the control system with G(s) = k(s+2)/(s(s²+2s+3) is

### 46) For type 1 system with parabolic input, the steady state error is

### 47) what is the Laplace transform of a function δ(t-2)?

### 48) The impulse response of a linear system is e-t, (t > 0). The corresponding transfer function is

### 49) A lead compensator used for a closed loop controller has the following transfer function For such a lead compensator

### 50) The transfer functions of two compensators are given below. Which one is correct? which one is correct?

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