This sets of multiple choice questions [MCQs] contains questions Control system 2 MCQ with answers for SPPU university exams and other exams in part 1...

## Set 1 of Control system MCQ

Q.no 1. Which of the following is an advantage of Laplace transform method

A : It gives solution in frequency domain only

B : It gives total solution more systematically

C : Initial conditions are incorporated in the very first step

D : Both B & C

Ans - D

Q.no 2. Sampling can be done by:

A : Impulse train sampling

B : Natural sampling

C : Flat-top sampling

D : All of the mentioned

Ans - D

Q.no 3. The time required to complete the conversion of Analog to Digital is ________ the duration of the hold mode of

A : Greater than

B : Equals to

C : Less than

D : Greater than or equals to

Ans - C Less than

Q.no 4. A band limited signal with a maximum frequency of 5 KHz to be sampled. According to the sampling theorem, the sampling frequency which is not valid is:

A : 1. 5 KHz

B : 2. 12 KHz

C : 3. 15 KHz

D : 20 KHz

Ans - A 1. 5 KHz

Q.no 5. Every square matrix satisfies its own characteristic equation. This statement is related to _____

A : Kalman Test

B : Gilbert Test

C : Similarity Transformation

D : Cayley Hamiltoan Theorem

Ans - D : Cayley Hamiltoan Theorem

Q.no 6. Aliasing is caused when:

A : Sampling frequency must be equal to the message signal

B : Sampling frequency must be greater to the message signal

C : Sampling frequency must be less to the message signal

D : Sampling frequency must be greater than or equal to the message signal

Ans - C : Sampling frequency must be less to the message signal

Q.no 7. Bounded input and Bounded output stability notion concerns with :

A : A system under influence of input

B : A system not under influence of input

C : A system under influence of output

D : A system not under influence of output

Ans - A : A system under influence of input

Q.no 8. Observability of any system can be investigated by

A : Kalman test

B : Gilbert test

C : Both 1 and 2

D : Neither 1 nor 2

Ans - C : Both 1 and 2

Q.no 9. Zero initial condition for a system means

A : Input reference signal is zero

B : zero stored energy

C : no initial movement of moving parts

D : system is at rest and no energy is stored in any of its components

Ans - D : system is at rest and no energy is stored in any of its components

Q.no 10. Inverse z-transform of the system can be calculated using:

A : Partial fraction method

B : Long division method

C : Basic formula of the z-transform

D : All of the mentioned

Ans - D : All of the mentioned

## Set 2 of Control system MCQ

Q.no 11. A system is represented using state equation has order 4. It has 3 inputs and 3 outputs then the dimentions of system matrix A are

A : 3 by 3

B : 4 by 3

C : 4 by 4

D : 3 by 4

Ans - C : 4 by 4

Q.no 12. Unit step response of the system described by the equation y(n) +y(n-1)=x(n) is:

A : z2 / (z+1)(z-1)

B : z / (z+1)(z-1)

C : z+1 /z-1

D : z(z-1)/z+1

Ans - A : z2 / (z+1)(z-1)

Q.no 13. For a system with order ‘n’ and outputs ‘m’, if only (n-m) states are estimated, then the state observer is called as _______ State Observer

A : Fractional order

B : Full order

C : Half order

D : Reduced order

Ans - D : Reduced order

Q.no 14. The spectrum of the sampled signal may be obtained without overlapping only if

A : fs ≥ 2fm

B : fs < 2fm

C : fs > fm

D : fs < fm

Ans - A : fs ≥ 2fm

Q.no 15. Digital control systems are generally superior to analog control systems, but they are always worse with regard to:

A : Speed

B : Diagnostics

C : User-friendliness

D : Flexibility

Ans - A : Speed

Q.no 16. Consider the following statements for phase lead compensation:

A : The maximum phase lag occurs at the arithmetic mean of the two corner frequencies.

B : Phase lead compensation shifts the gain crossover frequency to the right

C : both 1 and 2

D : nither 1 nor 2

Ans - A : The maximum phase lag occurs at the arithmetic mean of the two corner frequencies.

Q.no 17. If ‘M’ is a Modal matrix, which of the following is TRUE ?

A : Bbar = B Minv

B : Bbar = Minv B

C : Bbar = Minv B M

D : Bbar = M B

Ans - B : Bbar = Minv B

Q.no 18. Analysis of control system by Laplace transform technique is not possible for

A : Discrete time systems

B : Linear systems

C : time invarient systems

D : unstable continuous time systems

Ans - A : Discrete time systems

Q.no 19. The term backlash is…

A : Gear trains

B : Tacho generator

C : Servomotors

D : Induction relays

Ans - A : Gear trains

Q.no 20. Solution of homogeneous state equation consists of

A : Vander Monde matrix

B : Input matrix

C : Output matrix

D : State transition matrix

Ans - D : State transition matrix