Electrical machine design

deflecting

controlling

damping

any of the above

between 5 to 10 mm

between 10 to 15 mm

machines the usual limit of slot pitch is A. between 5 to 10 mm B. between 10 to 15 mm C. between 15 to 20 mm

between 25 to 35 mm

equal to that of armature mmf

less in comparison with the armature mmf

machines, ir order to prevent excessive distortion of field form by the armature reaction, the field mmf must be made A. equal to that of armature mmf B. less in comparison with the armature mmf C. large in comparison with the armature mmf

none of the above

exactly 0°

approximately 0°

exactly 90°

approximately 90°

in series with current coil

in parallel with current coil

in series with pressure coil

in parallel with pressure coil

equal to 50 kVA

equal to 100 kVA

above 200 kVA

none of the above

temperature error

wave shape error

frequency error

all of the above

0.5 to 0.8 Wb/m2

0.8 to 1.0 Wb/m2

1.1 to 1.35 Wb/m2

1.4 to 1.8 Wb/m2

0°

60°

90°

120°

Absolute instruments

Indicating instruments

Recording instruments

Integrating instruments