Quiz

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Year 2025

November
Week # 3 Quiz 1

Q1. Which of the following is false? Skin effect is found to increase with increase in

Q2. Where severe synchronising swing occurs, the relay employed is

Q3. Consider the following statements and choose the correct option:
Statement 1: The magnitude of earth fault current for a given fault position within a winding depends upon the method of neutral grounding.
Statement 2: Earth fault protection for an electric motor is provided by means of instantaneous overcurrent relay.

Q4. The operating time of an inverse definite minimum time (IDMT) overcurrent relay is ....................... proportional to the plug-setting multiplier (PSM) and ................. proportional to the time-multiplier setting (TMS).

Q5. The presence of earth wire in case of overhead lines

Q6. Which of the following statements are true?

Q7. For a single line to ground fault the zero sequence current is given by j 3.0 p.u., the current carried by the neutral during the fault is

Q8. The sequence components of the fault current are as follows: \(i_+ = j1.5 \: p.u., i_- = – j0.5 \: p.u., i_0 = –j1 \: p.u.\). The type of fault in the system is:

Q9. Which type of earthing system is most effective in preventing voltage transients and ensuring the safety of sensitive electronic equipment?

Q10. At normal atmospheric conditions breakdown strength of air is