WorksheetsAlternator and Generator Quiz
Total questions: 10
Worksheet time: 5mins
The load between two steam driven alternators operating in parallel may be adjusted by varying
Steam supply to their prime movers
Speed of the alternators
Field strengths of the alternators
Power factors of the alternators
The maximum current that can be supplied by an alternator depends on
Exciter current
Strength of the magnetic field
Number of poles
Speed of the exciter
The generator which gives dc supply to the rotor of an alternator is called
Convertor
Exciter
Inverter
Rectifier
In an alternator, when the load increases due to armature reaction, the terminal voltage
Rises
Drops
Remains unchanged
May drop or rise
The exciting field coil of an alternator is generally excited by
A separate dc generator driver by some source
A separate ac generator drive by some source
A dc generator coupled directly to the armature shaft
A battery
The rating of Alternator / Generator may be expressed in _
kW
kVA
kVAR
HP
Alternators are usually designed to generate
Definite currents
Definite power factor
Variable frequencies
Definite frequencies
In an alternator, armature reaction is considered equivalent to
Fictitious impedance
Fictitious conductance
Fictitious reactance
Fictitious resistance
The Synchronization of alternator depends on
Voltage, Frequency
Frequency, Phase Sequence
Phase Sequence
Voltage ,Phase Sequence& Frequency
The reluctance offered to the flux is more in
q axis
d axis
Near the pole canter
Mid way between two poles
