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Worksheets23RO2005 - Electrical Machines - Quiz 1
Total questions: 16
Worksheet time: 11mins
An induction motor works with
AC only
DC Only
Both AC & DC
Neither AC nor DC
The stator core of a 3-phase induction motor is laminated in order to reduce the
Eddy current loss
Hysteresis loss
Both eddy current and hysteresis loss
Weight of the stator
In a 3-phase squirrel cage induction motor, rotor conductors are short circuited through
end rings
slip rings
split rings
piston rings
The rotor winding of a 3-phase Induction motor derives its voltage and power from the stator winding through
Electromagnetic induction
Electromagnetic interference
Electromagnetic radiation
Electromagnetic force
Skewing of rotor slots prevents
Cogging
Plugging
Clogging
Rushing
Which of the following components in an electric motor converts electrical energy into mechanical energy?
Stator
Rotor
Commutator
Armature
A motor that operates both on AC and DC power sources is known as a:
DC motor
AC motor
Universal motor
Synchronous motor
The unit of electrical power is measured in:
Ohms
Volts
Amperes
Watts
What type of motor is known for its high starting torque and is commonly used in elevators and cranes?
DC motor
Synchronous motor
Stepper motor
Induction motor
Which motor has high starting torque
DC Series Motor
DC Shunt Motor
AC Motor
DC Compound Motor
which symbol is used to represent electrical flux?
ϕ
H
B
A
Which of the following components in an electric motor converts electrical energy into mechanical energy?
Stator
Rotor
Commutator
Armature
What does the thumb indicate in Fleming's left hand rule
Force
Current
Magnetic field
Voltage
write the unit of magnetic flux?
m2wb
wb
AT
AT/m
Armature of the dc machine is laminated to reduce which of the following:
hysteresis loss
eddy current loss
both eddy current loss and hysteresis loss
copper loss
What is the role of a capacitor in a single-phase induction motor?
Increases the torque output
Controls the speed of the motor
Creates a phase shift between windings
Regulates the voltage supply
