M

Mr. Dubey • 100.64K Points
Coach

Q. A dc machine is run at rated speed in forward direction and then in backward direction. It is observed that, speeds of the rotation are different, then it leads to the conclusion of

  • (A) incorrect brush placement
  • (B) incorrect pole and core alignment
  • (C) incorrect field supply
  • (D) all of the mentioned
Share
Explanation by: Mr. Dubey
given at the same speed of operation, if the speeds are different then the brushes are placed in not aligned manner.

You must be Logged in to update hint/solution

Discusssion

Login to discuss.

Related MCQs

Q. Brinell hardness of nitrided surface may be of the order of

Q. Which of the following mechanism is obtained from lower pair?

Q. The cable that connects the ultrasonic instrument to the search unit is specially designed so that one conductor is centred inside another. The techni

Q. In distillation columns, the number of bubble caps per tray primarily depends upon the

Q. The COP of cycle is given by(Q2=heat absorbed by evaporator and Wc=work done by compressor)

Q. During bottling of cold drinks (e.g. Pepsi), the main resistance to mass transfer for the absorption of carbon dioxide in water lies in the

Q. Which of the following circuits provide current to operate the ultrasonic instrument?

Q. ____ is an independent and self-operated vehicle which moves on defined guide ways

Q. A fan is being operated in an environment for which information is available. Now if the fan speed is doubled, how will the static pressure vary

Q. The crystal structure of brass is

Question analytics