Which is the wrong statement for DC Fan? 

This question was previously asked in
PGCIL NER DT (Electrical) 27 Feb 2022 Official Paper
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  1. DC motor fans use 70% less energy than a standard AC fan 
  2. DC motor fans are less noisy. 
  3. DC motor fans have more rouged construction than an AC motor fan. 
  4. DC motor fans have more speed options than an AC motor fan. 

Answer (Detailed Solution Below)

Option 3 : DC motor fans have more rouged construction than an AC motor fan. 
Free
CT 1: Classification I
10 Qs. 10 Marks 10 Mins

Detailed Solution

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The correct answer is option 3): (DC motor fans have more rouged construction than an AC motor fan)

Concept:

  • The DC fan is more popular nowadays, because of its advantage. It is operated with Direct current
  • They use less energy up to 70% less than a standard AC fan.
  • They are generally extremely quiet.
  • They will often have more speed options, the reverse function on the remote, and are generally faster to start, stop and change speed.DC motor fans have more speed options than AC motor fans. 
  • The motor is generally more compact and lighter, which allows for a slimmer motor design. so option 3 is wrong

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