In second order underdamped system ?

Related Mcqs:

1. Water is flowing through a series of four tanks and getting heated as shown in figure. It is desired to design a cascade control scheme for controlling the temperature of water leaving the tank 4 as there is a disturbance in the temperature of a second stream entering the tank 2. Select the best place to take the secondary measurement for the second loop?

   A. Tank 1
   B. Tank 2
   C. Tank 3
   D. Tank 4

2. The transfer function of a second order system is _____________________?

   A. 1/(T2s2 + 2ξTs + 1)
   B. 1/(T2s2 + 2Ts + 1)
   C. 1/(T2s2 + 2ξT + 1)
   D. None of these

3. 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

4. Which of the following is not a second order instrument ?

   A. Mercury in glass thermometer with covering
   B. Bare mercury in glass thermometer
   C. Pressure gauge with one bellow, two tubes and a tank
   D. None of these

5. The second order system with the transfer function 4/(s2 + 2s + 4) has a damping ratio of ___________________?

   A. 2.0
   B. 0.5
   C. 1.0
   D. 4.0

6. Phase lag of the frequency response of a second order system to a sinusoidal forcing function______________?

   A. Is 30°
   B. Is 90° at the most
   C. Approaches 180° asymptotically
   D. Is 120°

7. The closed loop pole of a stable second order system could be_______________?

   A. Both real and positive
   B. Complex conjugate with positive real parts
   C. Both real and negative
   D. One real positive and the other real negative

8. In a second order under damped system, the_________________?

   A. Time required for the response of first reach its ultimate value is called the response time
   B. Overshoot (which is a measure of how much the response exceeds the ultimate value) increase
   with the decrease of damping co-efficient
   C. Decay ratio (which is the ratio of the sizes of successive peaks) is equal to the reciprocal of
   overshoot
   D. None of these

9. A system with transfer function [(2S/4S) + 1] is of _____________ order?

   A. Zero
   B. 1st
   C. 2nd
   D. 3rd

10. A proportional controller with a gain of Kc is used to control a first order process. The offset will increase, if________________?

    A. Kc is reduced
    B. Kc is increased
    C. Integral control action is introduced
    D. Derivative control action is introduced