Design Electrical Machines Experienced Online Exam Quiz
Design Electrical Machines Experienced GK Quiz. Question and Answers related to Design Electrical Machines Experienced. MCQ (Multiple Choice Questions with answers about Design Electrical Machines Experienced
What is the range of clearance that can be left between rotor bars and the core?
Options
A : 0.1-0.4 mm
B : 0.2-0.4 mm
C : 0.15-0.4 mm
D : 0.4-0.6 mm
What is the range of current density in rotor bars?
Options
A : 4-9 A per mm2
B : 4-6 A per mm2
C : 4-7 A per mm2
D : 5-6 A per mm2
What is the relation of the rotor resistance to efficiency and losses?
Options
A : as rotor resistance, losses increase, efficiency increases
B : as rotor resistance, losses increase, efficiency decreases
C : as rotor resistance, losses decrease, efficiency has no change
D : as rotor resistance, losses decrease, efficiency decreases
What is the relation of closed slots with leakage reactance and overload capacity?
Options
A : closed slots give high leakage reactance, and increases the overload capacity
B : closed slots give high leakage reactance, and decreases the overload capacity
C : closed slots give low leakage reactance, and decreases the overload capacity
D : closed slots give low leakage reactance, and increases the overload capacity
What is the relation of closed slots with leakage reactance?
Options
A : closed slots give no leakage reactance
B : closed slots give high leakage reactance
C : closed slots give low leakage reactance
D : closed slots give negative leakage reactance
What is the formula for current in each of rotor bar?
Options
A : current in rotor bar = 2 * slot pitch * window space factor * stator torque * stator current * power factor * rotor slots
B : current in rotor bar = 2 * slot pitch * window space factor / stator torque * stator current * power factor * rotor slots
C : current in rotor bar = 2 * slot pitch * window space factor * stator torque * stator current * power factor / rotor slots
D : current in rotor bar = 2 * slot pitch / window space factor * stator torque * stator current * power factor / rotor slots
What is the relation between clearances and slots?
Options
A : high clearances are provided for salient slots
B : low clearances are provided for skewed slots
C : low clearances are provided for salient slots
D : high clearances are provided for skewed slots
What is the relationship between current density, conductor area and resistance?
Options
A : higher the current density, higher the conductor area, higher the resistance
B : higher the current density, higher the conductor area, lower the resistance
C : higher the current density, lower the conductor area, higher the resistance
D : lower the current density, lower the conductor area, lower the resistance
What is the relation between rotor mmf and stator mmf?
Options
A : rotor mmf = 0.85 * stator mmf
B : rotor mmf = 0.80 * stator mmf
C : rotor mmf = 0.75 * stator mmf
D : rotor mmf = 0.70 * stator mmf
What is the formula for the calculation of rotor resistance?
Options
A : rotor resistance = resistance of the bars + resistance of end rings
B : rotor resistance = resistance of the bars – resistance of end rings
C : rotor resistance = resistance of the bars * resistance of end rings
D : rotor resistance = resistance of the bars / resistance of end rings
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