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Electrical Machines
Which of the following motor has the highest power factor at full load?
Capacitor run
Resistance split phase
Shaded pole
Capacitor start
Capacitor run
Resistance split phase
Shaded pole
Capacitor start
Answer
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Related Question
Electrical Machines
Saving of copper in auto transformer is increased as compared to two winding transformer, when transformation ratio K approaches to
unity.
infinity.
zero.
two.
unity.
infinity.
zero.
two.
Answer
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Electrical Machines
In a DC machine
current and emf at the terminals are alternating.
current and emf in armature are alternating.
current and emf in armature are unidirectional
emf in armature conductors and at the terminals is alternating.
current and emf at the terminals are alternating.
current and emf in armature are alternating.
current and emf in armature are unidirectional
emf in armature conductors and at the terminals is alternating.
Answer
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Electrical Machines
The induction motor shaft is made of
aluminium.
mild steel.
stainless steel.
cast iron.
aluminium.
mild steel.
stainless steel.
cast iron.
Answer
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Electrical Machines
Armature reaction in DC generators will result in
open circuit.
increase in slip.
reduction in generated emf.
short circuit.
open circuit.
increase in slip.
reduction in generated emf.
short circuit.
Answer
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Electrical Machines
A large series motor is never started without some mechanical on it because otherwise it will
Produce sparking at brushes.
Draw too much current.
Develop excessive speed and damage itself.
Open fuse or circuit breaker.
Produce sparking at brushes.
Draw too much current.
Develop excessive speed and damage itself.
Open fuse or circuit breaker.
Answer
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