Voltech Interview Questions, Process, and Tips

The number of C&I instruments in work varies depending on the project requirements and scope.

• The number of C&I instruments can range from a few dozen to several hundred in a typical industrial project.

• These instruments include sensors, transmitters, controllers, recorders, and final control elements.

• Examples of C&I instruments include pressure transmitters, temperature sensors, flow meters, level switches, and control

RTD measures temperature using the resistance change of a metal, while thermocouples measure temperature using the voltage generated at the junction of two different metals.

• RTD stands for Resistance Temperature Detector, while thermocouple is a temperature sensor made of two different metals.

• RTDs are more accurate and stable compared to thermocouples.

• RTDs have a linear relationship between resistance and temperature, w...read more

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

• Consists of two coils of wire, known as primary and secondary coils

• Works on the principle of electromagnetic induction

• Used to step up or step down voltage levels in electrical circuits

• Commonly used in power distribution systems

Transformer protection refers to the measures taken to prevent damage to transformers from faults or abnormal operating conditions.

• Transformer protection devices include overcurrent relays, differential relays, and Buchholz relays.

• Overcurrent relays protect against overloads and short circuits.

• Differential relays compare the current entering and leaving the transformer to detect internal faults.

• Buchholz relays detect g...read more

SPD stands for Standard Operating Procedure. It is a documented guide outlining the steps and activities required to complete a specific task or process.

• SPD helps ensure consistency and quality in work processes

• It provides a clear outline of responsibilities and expectations

• Examples include SOPs for laboratory experiments, manufacturing processes, and customer service protocols