List of practice Questions

Star delta motor starters are used for ________ motors.
In a series RLC circuit, R indicates:
Speed of motor used in electric mixer has ________ RPM.
The efficiency of single-phase motor as compared to three-phase motor is:
Stator of three-phase induction motor is made by
The speed of motor or blower of room cooler is controlled by ________. (Selector switch Toggle switch)
The voltage transformer is also known as ________. (Air core transformer Potential transformer)
Eddy current in dynamometer type wattmeter can be minimised by using ________ within the region of magnetic field. (Metallic parts Non-metallic parts)
Torque and armature current characteristics are known as ________ characteristics. (Electrical Mechanical)
Series testing leads are connected to the terminals of plug top of the water heater. The lamp is not glowing. This indicates ________. (Short circuit Open circuit)
Squirrel cage induction motor is cheaper than slip ring motor.
Capacitor is always connected in series with starting winding.
Switch on power supply while working with the transformer.
The electromagnet is the main component of driving system of energy meter.
In DC motor, flux is directly proportional to armature current.
Universal motor works only with DC supply.
Three-phase induction motor works on the principle of ________. (Self-induction Mutual induction)
First aid for an electric shock victim is:
Define Lenz's law.
How will you perform open circuit test?
What do you mean by one cycle of a wave?
What is the recommended distance for connecting capacitors from soft starters?
How is the starting torque of an induction motor improved?
What do you mean by Probes?
What is the other name for pressure type water heater?