Identify an unbounded input from inputs whose transfer functions are given below______________?

Related Mcqs:

1. In a feed-back control system G and H denote open loop and close loop transfer functions respectively. The output-input relationship is_____________?

   A. G/(1 + H)
   B. H/(1 + G)
   C. G/H
   D. H/G

2. For two non-interacting first order systems connected in series, the overall transfer function is the ______________ of the individual transfer functions?

   A. Product
   B. Ratio
   C. Sum
   D. Difference

3. Which of the systems having following transfer functions is stable ?

   A. 1/(s2 + 2)
   B. 1/(s2 – 2s + 3)
   C. 1/(s2 + 2s + 2)
   D. exp (-20s)/(s2 + 2s – 1)

4. In a closed loop system, the process to be controlled is an integrating process with transfer function 1/2s. The controller proposed to be used in an integral controller with transfer function 1/T1s. When a step change in set point is applied to such a closed loop system, the controlled variable will exhibit__________________?

   A. Overdamped response
   B. Underdamped response
   C. Undamped response
   D. Unstable response

5. The characteristic equation for the control system with a closed loop transfer function G1/1 + G2 is given by 1 + G2 = 0. The characteristic equation for the control system_________________?

   A. Depends only upon the open loop transfer function
   B. Determines its stability
   C. Is the same for set point or load changes
   D. All A , B & C.

6. Bode diagram are generated from output response of the system subjected to which of the following input ?

   A. Impulse
   B. Step
   C. Ramp
   D. Sinusoidal

7. A sinusoidal variation in the input passing through a linear first order system _________________?

   A. Becomes more oscillatory (frequency increases)
   B. Becomes less oscillatory (frequency decreases)
   C. Gets amplified (magnitude increases)
   D. Gets attenuated (magnitude decreases)

8. What is the Laplace transform of impulse input having magnitude „X‟ ?

   A. X
   B. X2
   C. 1/X
   D. 1

9. What is the dynamic error in a critically damped second order instrument for a ramp input (At) ?

   A. 0.5 AT
   B. 2 AT
   C. √(AT)
   D. 1.5 AT

10. For an input forcing function, X(t) = 2t2, the Laplace transform of this function is________________?

    A. 2/s2
    B. 4/s2
    C. 2/s3
    D. 4/s3