Synopsis of Control Systems - 1

By -







You may also like:

1. Synopsis of control systems - 2

Comments

Post a Comment

Popular posts from this blog

Multiple Choice Questions in Power Electronics - 1

By -
  Important multiple choice questions from Power Electronics 1.       Which one of the following statements is not correct? a)       Power MOSFETs are so constructed as to avoid punch through. b)       In a power MOSFET, the channel length is relatively large and channel width is relatively small c)       Power MOSFETs do not experience any minority carrier storage d)       Power MOSFETs can be put in parallel to handle large currents 2.       Which one is most suitable power device for high frequency (>100 kHz) switching application? a)       Power MOSFET b)       BJT c)       Schottky diode d)       Microwave transistor 3.       A thyristor equivalent of thyratron tube is a)       SCR b)       UJT c)       Diac d)       Triac 4.       Turn-on of thyristor takes place when a)       Anode to cathode voltages is positive b)       Anode to cathode voltages is negative c)       There is a positive current pulse at the gate d)       The
Read more

Multiple Choice Questions on Power System - 3

By -
Important multiple choice questions on power system 1.        A line trap in carrier current relaying tuned to carrier frequency presents A)      High impedance to carrier frequency but low impedance to power frequency B)       Low impedance to both carrier and power frequency C)       High impedance to both carrier and power frequencies D)      Low impedance to carrier frequency and high impedance to power frequency 2.        The use of fast acting relays and circuit breakers for clearing a sudden short circuit on a transmission link between generator and the receiving end bus improves the transient stability of the machine because A)      Short circuit current becomes zero B)       Post-fault transfer impedance attains a value higher than that during the fault C)       Ordinate of the post-fault power-angle characteristic is higher than that of during fault characteristic D)      Voltage behind the transient reactance increases to a higher value 3.        A
Read more

Multiple Choice Questions on Power Systems - 7

By -
Important Multiple Choice questions on Power Systems 1.        For transmission line which one of the following relations is true? A)      AD-BC=1 B)       –AD-BC=1 C)       AD-BC=-1 D)      AD-BC=0 2.        For a given base voltage and base volt-amp, the per unit impedance value of an element is X. what will be the per-unit impedance value of this element when the voltage and volt-amp bases are both doubled? A)      4X B)       2X C)       X D)      0.5X 3.        A 3-phase transmission line has its conductors at the corners of an equilateral triangle with side 3m. the diameter of each conductor is 1.63 cm. the inductance of the line per phase per km is A)      1.232 mH B)       1.182 mH C)       1.093 mH D)      1.043 mH 4.        A cable has inductance of 0.22mH per km and capacitance of 0.202 micro farads per km. the surge impedance of the cable is A)      28 ohms B)       33 ohms C)       42 ohms D)      50 ohms 5.        The capacitanc
Read more