Control Systems 5

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Subject: Control Systems 5

Part 5: List for questions and answers of Control Systems


Q1. If a type 0 system is subjected to step input, what is its effect on steady state error?

a) It increases continuously

b) it remains constant

c) It decreases monotonically

d) It gets subjected to another input


Q2. Type 0 systems are unsuitable ___________

a) For ramp inputs

b) If the input is parabolic in nature

c) both a and b

d) None of the above


Q3. Which among the following is represented by a parabolic input signal?

a) Position

b) Force

c) Velocity

d) acceleration


Q4. In time domain system, which response has its existence even after an extinction of transient response?

a) Step response

b) Impulse response

c) steady state response

d) All of the above


Q5. Two loops are said to be non-touching only if no common ______exists between them

a) Loop

b) Feedback path

c) Branch

d) node


Q6. For which systems are the signal flow graphs applicable?

a) Causal

b) Invertible

c) linear time invariant system

d) Dynamic 


Q7. While solving signal flow graph using mason’s gain equation, what does the second letter in two subscript notation of ‘l’ stand for?

a) Serial number of loop

b) Parallel number of loop

c) Number of touching loops

d) number of non-touching loops


Q8. In a signal flow graph method, how is an overall transfer function of a system obtained?

a) Poisson’s equation

b) Block diagram reduction rules

c) mason’s equation

d) Lagrange’s equation


Q9. In block diagram representation, what do the lines connecting the blocks, known as?

a) branches

b) Nodes

c) Datums

d) Sources


Q10. For the elimination of feedback loops, the derivation based on transfer function of ______ loop is used

a) Open

b) closed

c) Both a and b

d) None of the above


Q11. Associative law for summing point is applicable only to those summing points which are _____connected to each other

a) directly

b) Indirectly

c) Orthogonally

d) Diagonally


Q12. If finite number of blocks is connected in series or cascade configuration, then how are the blocks combined algebraically?

a) By addition

b) by multiplication

c) By differentiation

d) By integration 


Q13. The fundamental function of a tachometer is the conversion of angular _______ into voltage

a) velocity

b) Displacement

c) Acceleration

d) Current


Q14. Laplace transform of an impulse response is regarded as _____function of the system

a) Analytic

b) Parabolic

c) transfer

d) Hypothetical


Q15. If a signal is passed through an integrator, it _____the amplitude of noise signal

a) Enhances

b) reduces

c) Stabilizes

d) Factorizes


Q16. For the transfer function given below, where does the zero of the system lie? G(s) = 5s -1 / s^2 + 5s + 4

a) S = -1 & s = -1/4

b) S = -4 & s = -1

c) s = 1/5

d) S = -1/5


Q17. A good control system should be sensitive to __________

a) Internal disturbances

b) Environmental parameters

c) Parametric variations

d) input signals (except noise)


Q18. What is the value of steady state error in closed loop control systems?

a) Zero

b) Unity

c) Infinity

d) Unpredictable 


Q19. Into which energy signal does the position sensor convert the measured position of servomotor in servomechanisms?

a) Mechanical

b) electrical

c) Thermal

d) Light


Q20. Which among the following controls the speed of d.c. motor?

a) Galvanometer

b) Gauss meter

c) Potentiometer

d) tachometer 


Part 5: List for questions and answers of Control Systems


Q1. Answer: b


Q2. Answer: c


Q3. Answer: d


Q4. Answer: c


Q5. Answer: d


Q6. Answer: c


Q7. Answer: d


Q8. Answer: c


Q9. Answer: a


Q10. Answer: b


Q11. Answer: a


Q12. Answer: b


Q13. Answer: a


Q14. Answer: c


Q15. Answer: b


Q16. Answer: c


Q17. Answer: d


Q18. Answer:


Q19. Answer: b


Q20. Answer: d