TCS Interview Questions and Answers

The process for preparing a Single Line Diagram (SLD) involves identifying all electrical components and their connections.

• Identify all electrical components in the system

• Determine the connections between the components

• Represent the components and connections using standardized symbols

• Include power sources, distribution panels, transformers, circuit breakers, switches, and loads

• Ensure the diagram is clear, organized, and easy to understand

Sizing a cable tray involves considering the number and type of cables, environmental conditions, and support spacing. Cable trays are classified by material (steel, aluminum, fiberglass) and size (light duty, medium duty, heavy duty).

• Consider the number and type of cables to be installed in the cable tray

• Take into account environmental conditions such as temperature, moisture, and corrosive elements

• Determine the support spacing based on the weight of the cables and tray mate...read more

Lux levels are calculated using the formula Lux = Lumens / Area (in square meters). Required lux levels vary depending on the specific application.

• Lux levels are calculated by dividing the total lumens of light by the area in square meters that the light is illuminating.

• For roads, recommended lux levels range from 10 to 20 lux for residential streets to 50 to 100 lux for highways.

• Workstations typically require lux levels between 300 to 500 lux for general office work, and up ...read more

A rig platform is a structure used in offshore drilling operations to support drilling equipment and personnel.

• Rig platforms are typically located in bodies of water and are used for extracting oil and gas from beneath the seabed.

• They provide a stable base for drilling rigs, equipment, and crew to operate in harsh offshore environments.

• Rig platforms can be fixed (attached to the seabed) or floating (anchored to the seabed or kept in position by dynamic positioning systems).

The standards followed for cable trays are typically NEMA VE 1 and NEC, while the standards for earthing include IEEE 80 and IEC 60364.

• Cable trays are usually designed according to NEMA VE 1 and NEC standards.

• Earthing systems are typically designed following IEEE 80 and IEC 60364 standards.

• Compliance with these standards ensures safety, reliability, and proper functioning of electrical systems.

• For example, NEMA VE 1 provides guidelines for cable tray installation, while IEEE ...read more

EPC stands for Engineering, Procurement, and Construction. EPCIC stands for Engineering, Procurement, Construction, Installation, and Commissioning. FEED stands for Front End Engineering Design.

• EPC projects involve the design, procurement, and construction of a project by a single contractor.

• EPCIC projects include installation and commissioning in addition to the EPC scope.

• FEED projects focus on the initial engineering and design phase before detailed design and construction ...read more

Multiple repairs in the same joint can be identified by visual inspection and non-destructive testing.

• Visual inspection can reveal signs of previous repairs such as weld spatter, grinding marks, or mismatched weld beads.

• Non-destructive testing methods such as ultrasonic testing or radiography can detect hidden repairs or defects.

• Documentation and record keeping can also help identify previous repairs in the same joint.

• It is important to ensure that all repairs are properly do...read more

WPS and PQR are both related to welding procedures, but they serve different purposes.

• WPS stands for Welding Procedure Specification, which outlines the specific welding parameters and techniques to be used for a particular welding job.

• PQR stands for Procedure Qualification Record, which is a document that verifies the welder's ability to produce welds meeting the required standards.

• WPS is prepared before the welding job and provides instructions for welders, while PQR is cre...read more