Module-7 AC Single Phase Motor

 


160 : What is the basic working principle of single phase universal motors?

A : Same as DC Motors
B : Faradays laws
C : Rotating magnetic field theory
D : Flemings right hand rule

161 : Which motor has very low starting torque?
A : Three phase squirrel cage motor
B : Three phase slip ring motor
C : Resistance start induction run motor
D : Universal motor

162 : Which type of rotor is used in capacitor start induction run single phase motor?
A : Slip ring type
B : Commutator type
C : Wound rotor type
D : Squirrel cage type

163 : How many number of windings are there in split phase resistance type induction motor?
A : 1
B : 2
C : 3
D : 4

164 : Which winding circuit will have more resistance in split phase resistance type induction motor?
A : Main winding
B : Compensating winding
C : Auxilary winding
D : Damper winding

165 : Which motor operates without centrifugal switch?
A : Permanent capacitor motor
B : Capacitor start capacitor run motor
C : Capacitor start induction run motor
D : Resistance induction run motor

166 : Which winding is disconnected by the centrifugal switch in split phase resistance type induction motor
A : Main winding
B : Auxilary winding
C : Compensating winding
D : Damper winding

167 : Which speed the centrifugal switch acts in a single phase induction motor?
A : About 70% of speed
B : About 25% of speed
C : About 50% of speed
D : At full speed

168 : Which single phase induction motor has high starting torque?
A : Split phase induction motor
B : Capacitor start induction run motor
C : Shaded pole motor
D : Two value Capacitor motor

169 : Which winding is disconnected at 70% of speed in a capacitor start induction run motor?
A : Auxilary winding
B : Main winding
C : Running winding
D : Damper winding

170 : What is the another name of main winding in a single phase capacitor start induction run motor?
A : Auxilary winding
B : Damper winding
C : Running winding
D : Starting winding

171 : What is the part marked as X?
A : Main coil
B : Shading coil
C : Yoke
D : Poles

172 : What is the material used to make the shading coil of a shaded pole motor?
A : Aluminium
B : Brass
C : Silver
D : Copper

173 : Which single phase motor operates in both AC and DC supply?
A : Shaded pole motor
B : Two value Capacitor motor
C : Universal motor
D : Split phase induction motor

174 : What is the another name of Universal motor?
A : AC single phase series motor
B : Three phase induction motor
C : Shaded pole motor
D : Synchronous motor

175 : Which of the motor has wound rotor and commutator?
A : Capacitor start capacitor run motor
B : Capacitor start induction run motor
C : Shaded pole motor
D : Universal motor

176 : What is the value of starting torque for a universal motor?
A : 100 % of full load torque
B : Below 50% of full load torque
C : 450 % of full load torque
D : 150 % of full load torque

177 : Which motor runs at synchronous speed?
A : Capacitor start induction run motor
B : Shaded pole motor
C : Universal motor
D : Hysteresis motor

178 : Which motor stator is wound for three phase?
A : Reluctance motor
B : Capacitor start induction run motor
C : Shaded pole motor
D : Universal motor

179 : Which motor stator consists of multiple salient electro magnet poles?
A : Shaded pole motor
B : Repulsion motor
C : Capacitor start induction run motor
D : Universal motor

180 : Which of the motor has step movements?
A : Shaded pole motor
B : Repulsion motor
C : Stepper motor
D : Universal motor

181 : Which type of winding is done in the repulsion motor?
A : Distributed AC winding
B : DC lap or wave winding
C : Damper winding
D : Compensating winding

182 : Which motor is used in food mixer?
A : Universal motor
B : Stepper motor
C : Capacitor start induction run motor
D : Repulsion motor

183 : Which motor is used for refrigerators and air conditioners?
A : Universal motor
B : Stepper motor
C : Capacitor start induction run motor
D : Two value Capacitor motor

184 : Which motor is used in toys and hair dryers?
A : Stepper motor
B : Universal motor
C : Shaded pole motor
D : Synchronous motor

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