Category: D.C. Generators

A. 150 V
B. 175 V
C. 240 V
D. 290 V

A. where low voltage and high currents are involved
B. where high voltage and small cur-rents are involved
C. in both of the above cases
D. in none of the above cases

A. there is no load on|he generator
B. the generator runs on full load
C. the generator runs on overload
D. the generator runs on designed speed

A. voltage of the incoming generator should be same as that of bus bar
B. polarity of incoming generator should be same as that of bus bar
C. all the series fields should be run in parallel by means of equilizer connection
D. series fields of all generators should be either on positive side or negative side of the armature
E. all conditions mentioned above should be satisfied

A. silicon steel
B. copper
C. non-ferrous material
D. cast-iron

A. zero
B. small
C. the same as rated voltage
D. high

A. is always present
B. is always absent
C. may be sometimes present
D. none of the above

A. identified by the scarring of the commutator segment to which open circuited coil is connected
B. indicated by a spark completely around the commutator
C. both A. and (b)
D. none of the above

A. 0.005 mm
B. 0.05 mm
C. 0.5 m
D. 5 m

A. reverse the field connections
B. increase the field resistance
C. increase the speed of primemover
D. check armature insulation resistance