Techno Electric & Engineering Company Electrical Engineer Interview Questions and Answers

Control wiring for ACB and VCB involves connecting control circuits to the breaker for proper operation.

• Control wiring connects the breaker control circuits to the control panel.

• The wiring should be properly sized and insulated.

• The wiring should be color-coded for easy identification.

• The wiring should be tested for proper operation before energizing the breaker.

• Examples of control circuits include trip coil, close coil

Control wiring is read by understanding the symbols and connections on the diagram.

• Identify the power source and the load

• Understand the symbols used for switches, relays, and other components

• Follow the connections and determine the control logic

• Check for any safety interlocks or emergency stops

• Verify the wiring matches the diagram

A star delta starter is a type of motor starter used to reduce the starting current of a motor.

• Connect the motor windings in a star configuration for starting

• Switch the motor windings to a delta configuration once it reaches a certain speed

• Use a contactor and timer to control the switching

• Commonly used for large motors to reduce starting current and prevent damage to the motor

• Requires knowledge of motor wiring and cont

Power saving refers to reducing energy consumption to conserve resources and reduce costs.

• Using energy-efficient appliances and light bulbs

• Turning off electronics when not in use

• Using power strips to easily turn off multiple devices

• Adjusting thermostat settings to reduce heating and cooling

• Using renewable energy sources like solar panels

• Implementing energy-saving practices in industries and businesses

DG sets have various protection mechanisms to ensure safe and efficient operation.

• Overload protection

• Short circuit protection

• Under/over voltage protection

• Over/under frequency protection

• Reverse power protection

• Earth fault protection

• Cooling system protection

• Fuel system protection

Interlocks are safety mechanisms that prevent equipment from operating under unsafe conditions.

• Interlocks are used in various industries to prevent accidents and damage to equipment.

• They can be mechanical, electrical, or software-based.

• Examples include emergency stop buttons, safety gates, and pressure switches.

• Interlocks are designed to be fail-safe, meaning that they will prevent operation even if a component fails.

• T...read more

There are several types of safety measures in electrical engineering.

• Electrical safety

• Fire safety

• Equipment safety

• Personal safety

• Environmental safety