Wipro PARI Apprentice Engineer Interview Questions and Answers

Short circuit doesn't happen between conductor and pole while raining due to the insulating properties of rainwater.

• Rainwater is a poor conductor of electricity

• It acts as an insulator between the conductor and pole

• The insulating properties of rainwater prevent the flow of current and thus short circuit is avoided

Earthing is the process of connecting electrical systems to the ground to prevent electrical shock and protect against electrical faults.

• Earthing is also known as grounding.

• It involves connecting the electrical system to the earth using conductive materials.

• Earthing provides a path for the flow of excess electrical current to the ground.

• It helps in preventing electrical shock by diverting the current away from the user...read more

The colours of phase refer to the different stages or states of a substance or system.

• Phase colours are used to visually represent different phases or states of matter.

• Common phase colours include solid (usually white or gray), liquid (various colors), and gas (colorless).

• Other phases like plasma (ionized gas) can have unique colours like blue or purple.

• Phase colours can also be influenced by impurities or chemical rea...read more

A fuse is a safety device that protects electrical circuits from excessive current flow.

• A fuse is made up of a metal wire or strip that melts when excessive current passes through it.

• When the fuse melts, it breaks the circuit and prevents damage to the electrical components.

• Fuses are commonly used in electrical systems to protect against short circuits and overloads.

• Examples of fuses include glass tube fuses, blade fus

MCB stands for Miniature Circuit Breaker.

• MCB is an electrical switch designed to protect an electrical circuit from damage caused by overload or short circuit.

• It automatically interrupts the flow of current when a fault is detected.

• MCBs are commonly used in residential, commercial, and industrial applications.

• They are more compact and efficient compared to traditional fuses.

• Examples of MCB manufacturers include Schneid

Fuse and MCB are both electrical protection devices, but they differ in their operation and resetability.

• Fuse is a one-time use device that melts when excessive current flows through it, breaking the circuit and protecting the electrical system.

• MCB (Miniature Circuit Breaker) is a resettable device that trips and opens the circuit when excessive current is detected, but can be easily reset after the fault is resolved.

• F...read more