Roadmap IT Solutions Interview Questions and Answers

A fuse is a safety device that protects electrical circuits from overloading by breaking the circuit when the current exceeds a certain level.

• A fuse contains a metal wire or filament that melts when the current exceeds a safe level

• The melted wire breaks the circuit, preventing further flow of electricity

• Fuses are rated by their current-carrying capacity and voltage

• Replacing a blown fuse with one of the same rating is important for safety

• Examples of fuses include glass tube fu...read more

Parel and series are types of electrical circuits used in electronics.

• Parel circuit is a type of circuit where the components are connected in parallel to each other.

• Series circuit is a type of circuit where the components are connected in a single path.

• In a parallel circuit, the voltage across each component is the same, while in a series circuit, the voltage is divided among the components.

• Examples of parallel circuits include household wiring and electronic devices with mu...read more

MCB stands for Miniature Circuit Breaker. It is an electrical switch that automatically shuts off the electrical circuit during an overload or short circuit.

• MCB is a type of circuit breaker that is commonly used in residential and commercial buildings.

• It is designed to protect electrical circuits from damage caused by overloading or short circuits.

• When an overload or short circuit occurs, the MCB automatically trips and shuts off the electrical circuit.

• MCBs are available in d...read more

Working a phase in electricity involves understanding the flow of current and voltage in a circuit.

• A phase is a single alternating current waveform that is part of a larger electrical system

• Working a phase involves understanding the phase angle, which is the difference in timing between the voltage and current waveforms

• Phase rotation is important to ensure that all phases are in the correct order and voltage is balanced

• Examples of phase-related tasks include measuring voltage...read more

ELCB stands for Earth Leakage Circuit Breaker. It is a safety device that automatically switches off the electricity supply when it detects a leakage current.

• ELCB is installed in the electrical distribution board and is connected to the earth wire of the circuit.

• It works by continuously monitoring the current flowing through the live and neutral wires of the circuit.

• If there is any imbalance in the current flow, it means that some current is leaking to the earth, and the ELCB...read more