Start button is a green color actuator which when pressed will perform operates a normally closed contact

Emergency STOP button which when operated, actuator latches in the off position

Which of the following lamp is used in signal lamp units:

Emergency Stop button actuator must be mounted on ____ color background

A Circuit breaker is an electro-magnetically operates switch

Contactors are generally designed for switching:

Electrical contactors are designed for high switching frequency, long life and short switching times.

The making and breaking current capacity of Contactors will be matched to its

Which type of protection is provided for electrical motor against over heating

In motor circuits, fuse or MCBs are used for protection of motor against short circuits and ground faults

Bi-metalic Strip is present in which of the following relay:

if the current flowing through the motor windings is doubled, then the heat produced will be:

Which of the following relay is used for the protection of motor against “Single Phasing”

DOL Starter protects the motor against Over Loading and Single Phasing:

When the motor is running and if the supply to the Contactor coil fails, then motor will stop

In DOL Starter, Start button is an integral part of the overload relay:

Contactor coils are present in manual Motor Starters:

High Starting Torques can  be attained with the help of reduced voltage starting methods of induction motor

High inrush currents during starting can  be reduced by employing reduced voltage starting methods