1) The actual cause of armature reaction in electrical D.C generator is
a) armature conductors
b) field winding
c) load current in armature
d) due to field current
a) armature conductors
b) field winding
c) load current in armature
d) due to field current
2) Which winding is practically used in armature for high currents
a) lap winding
b) wave winding
c) both
d) fractional winding
3) In electrical d.c generator the inter pole polarity is
a) polarity of main pole a head of generator direction
b) polarity of main pole a behind of generator direction
c) any polarity is used
d) none
4) Why inter pole shape is taperd intentionally
a) for increasing the inter pole flux
b) do not get saturated
c) for reducing demagnetization effect
d) none
5) Which one the following types of electrical generators does NOT need equalizers for satisfactory parallel operation
a) series
b) over compound
b) flat compound
d) under compound
6) Which electrical generators are most suitable for parallel operation
a) series generator
b) shunt generator
c) compound generator
d) separately excited dc generator
7) Which electrical generators are used as a voltage boosters
a) shunt generator
b) series generator
c) differential compound generators
d) none
8) The voltage build up process of a electrical d.c generator is
a) difficult
b) delayed
c) cumulative
d) infinite
9) Which of the following d.c generator cannot build up open circuit?
a) shunt
b) series
c) short shunt
d) long shunt
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