SSC JE Electrical 2019 with solution SET-1 Identify the machine shown in the circuit DC short shunt compound generator DC long shunt compound generator DC shunt motor DC short shunt compound motor DC short shunt compound generator DC long shunt compound generator DC shunt motor DC short shunt compound motor ANSWER DOWNLOAD EXAMIANS APP
SSC JE Electrical 2019 with solution SET-1 The below symbol which is used in single line diagrams represents Power transformer Potential transformer Current transformer Circuit breaker Power transformer Potential transformer Current transformer Circuit breaker ANSWER DOWNLOAD EXAMIANS APP
SSC JE Electrical 2019 with solution SET-1 Which of the following lamps employs a bimetallic strip? Mercury vapor lamp Fluorescent lamp Sodium vapor lamp Incandescent lamp Mercury vapor lamp Fluorescent lamp Sodium vapor lamp Incandescent lamp ANSWER DOWNLOAD EXAMIANS APP
SSC JE Electrical 2019 with solution SET-1 Identify the INCORRECT statement with regards to synchronous motors The armature winding is placed on the stator It is a self-starting machine It is a constant speed motor The field winding is placed on the rotor The armature winding is placed on the stator It is a self-starting machine It is a constant speed motor The field winding is placed on the rotor ANSWER EXPLANATION DOWNLOAD EXAMIANS APP A synchronous motor is not a self-starting motor. You can check out this article why synchronous motor is not self starting
SSC JE Electrical 2019 with solution SET-1 Find the frequency of rotor induced EMF of a 3-phase, 440V, 50 Hz induction motor has a slip of 10% 25Hz 2.5Hz 50Hz 5Hz 25Hz 2.5Hz 50Hz 5Hz ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Given DataVoltage = 440 VFrequency = 50 HzSlip = 10% =0.1Now,Rotor frequency = slip × frequency= 0.1 × 50 = 5 Hz
SSC JE Electrical 2019 with solution SET-1 What is the reason behind using a centrifugal switch in a single-phase induction motor? To out in the capacitor during running conditions To cut-off the starting winding at an appropriate instant To improve the starting performance of the motor To protect the motor from overloading To out in the capacitor during running conditions To cut-off the starting winding at an appropriate instant To improve the starting performance of the motor To protect the motor from overloading ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The centrifugal switch is used to disconnect the starting winding of the motor once the motor approaches its normal operating speed i.e 50% – 70% speed.
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