WNS Interview Questions and Answers

Transformer losses are the energy losses that occur in a transformer during the process of energy transfer.

• There are two types of transformer losses: copper losses and iron losses.

• Copper losses occur due to the resistance of the transformer windings and are proportional to the square of the current flowing through the windings.

• Iron losses occur due to the magnetic properties of the transformer core and are constant regardless of the load on the transformer.

• Iron losses can be ...read more

The first lesson of security is to always be proactive and anticipate potential threats.

• Always be vigilant and aware of your surroundings

• Implement preventive measures to minimize risks

• Stay updated on the latest security protocols and technologies

• Train employees on security best practices

• Conduct regular risk assessments and audits

• Have a contingency plan in place for emergencies

• Examples: Installing surveillance cameras, using access control systems, conducting background checks...read more

Induction motor works on the principle of electromagnetic induction.

• The stator of the motor produces a rotating magnetic field.

• This magnetic field induces a current in the rotor, which in turn produces its own magnetic field.

• The interaction between the two magnetic fields causes the rotor to rotate.

• Induction motors are commonly used in industrial applications due to their reliability and low maintenance.

• They are also used in household appliances such as washing machines and r...read more

DC is a constant flow of electricity in one direction while AC is a flow of electricity that periodically reverses direction.

• DC stands for Direct Current while AC stands for Alternating Current

• DC is commonly used in batteries and electronic devices while AC is used in homes and businesses for powering appliances and lighting

• AC can be transmitted over long distances with less energy loss compared to DC

• AC can be easily converted to different voltages while DC cannot

• Examples of ...read more

A transformer is a device that transfers electrical energy between two or more circuits through electromagnetic induction.

• Transformers consist of two coils of wire, known as the primary and secondary coils.

• The primary coil is connected to a power source, creating a magnetic field when current flows through it.

• This magnetic field induces a voltage in the secondary coil, transferring energy from the primary to the secondary circuit.

• Transformers are used to step up or step down ...read more

G.P stands for General Purpose documents.

• G.P documents refer to materials that are not classified or restricted.

• These documents are typically used for general purposes and do not contain sensitive or confidential information.

• Examples of G.P documents include company policies, training manuals, and public information brochures.