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WorksheetsDC Generator.b EEE430
Total questions: 10
Worksheet time: 5mins
Which of the following DC machines can be used both as a generator and a motor?
Shunt DC machine
Series DC machine
Compound DC machine
All of the above
What happens to the terminal voltage of a separately excited DC generator when the load increases?
It increases
It remains constant
It decreases slightly
It fluctuates randomly
In a shunt-excited DC generator, the field winding is connected:
In series with the armature
In parallel with the armature
To an external AC source
To the commutator directly
Which part of the DC generator converts mechanical energy into electrical energy?
Field winding
Armature
Commutator
Brush assembly
What will happen if the residual magnetism in a self-excited generator is lost?
Generator output increases
Generator fails to build up voltage
Armature current increases
Speed decreases
What is the main cause of the hysteresis loop observed in no-load characteristics?
Armature reaction
Eddy current loss
Magnetic lag in the iron core
Field winding resistance
Which equipment measures torque in the DC generator experiment?
Power Pack MV1300
Torque Measuring Unit MV1051
Shunt Rheostat MV1905
Resistive Load MV1100
What parameter is varied by adjusting the resistive load RB?
Field current
Load current
Speed
Excitation voltage
Which statement is true for the external characteristic of a shunt generator?
Voltage remains constant
Voltage increases with load
Voltage decreases sharply with increasing load
Voltage fluctuates sinusoidally
Why must hands be dry before touching any electrical circuit?
To prevent shock
To improve current flow
To avoid electric shock and short circuits
To maintain equipment calibration
