Which of the following brushes can be used for high values of current density ?

Related MCQs

• For large power transformers, self oil cooled type or air blast type which of the following values of current density may be used ?
• For 275 kV transformers, using cold rolled grain oriented steel, which of the following values of flux density may be used?
• The density of hydrogen is _____ times the density of air.
• ______ brushes are fragile and cause excessive wear of commutator,
• ________ is the common method of applying brushes to the commntator.
• A current density of _____ is ilsed for large power transformers with forced circulation of oil or with water cooling coils
• The noise produced by a ______ cooled machine is less as the rotor moves in a medium of smaller density.
• The cylindrical windings using circular conductors are used for current rating of
• Multi-layer helical windings are commonly used in the transformers as high voltage windings
• The value of exciting or magnetizing current depends upon which of the following factors ?