Quiz

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Year 2024

October
Week # 1 Quiz 5

Q1. The damping ratio of a second-order system affects its:

Q2. The necessary condition of stability are:

Q3. Which type of node comprises incoming as well as outgoing branches?

Q4. Which of the following is not correct for an open loop control system?

Q5. Root locus is used to calculate

Q6. In an automatic control system which of the following elements is not used ?

Q7. The frequency and time domain are related through which of the following?

Q8. The term "closed-loop gain" in a control system refers to the gain of the:

Q9. The rotor of a four-pole, 50 Hz slip-ring induction motor has a resistance of \(0.2\:\Omega\) per phase and runs at 1425 rpm at full-load. Determine the external resistance per phase which must be added to reduce the speed to 1200 rpm, the torque remaining same in both the cases.

Q10. A 3-phase induction motor draws a current of 50 A from mains when started by direct switching. If an auto transformer with 60% tapping is used for starting, the current drawn from the mains will be