10+ Ircon International Interview Questions and Answers

Tests to be conducted before charging of Power transformer

• Insulation resistance test

• Polarity and phase-relation test

• Turns ratio test

• Vector group test

• Oil test

• Functional test

Use advanced earthing techniques and equipment to accurately measure earth values in rocky areas.

• Use specialized equipment like clamp-on ground resistance testers

• Install additional grounding rods to improve accuracy

• Consider using chemical electrodes for better contact with the ground

• Ensure proper installation and maintenance of earthing system

• Consult with experts in earthing and grounding for best practices

Implement strict inventory management, conduct regular audits, and train employees on theft prevention and material handling.

• Implement a strict inventory management system to keep track of all materials and equipment.

• Conduct regular audits to identify any discrepancies or missing items.

• Train employees on theft prevention techniques and proper material handling procedures.

• Install security cameras and alarms to deter theft.

• Use tamper-proof locks and secure storage areas for hig...read more

Charging current of transmission line varies based on the conditions - OH or UG.

• Charging current is the current that flows through the capacitance of the transmission line.

• In OH conditions, the charging current is higher due to the larger distance between the conductors and the ground.

• In UG conditions, the charging current is lower due to the smaller distance between the conductors and the ground.

• The charging current also depends on the voltage level and the length of the tra...read more

Scheduled maintenance programs for TSS and PSS

• TSS (Total Suspended Solids) requires regular cleaning of filters and monitoring of chemical levels

• PSS (Particulate Suspended Solids) requires regular cleaning of filters and monitoring of pressure levels

• Both TSS and PSS require regular calibration of instruments and replacement of worn out parts

• Maintenance schedules may vary depending on the specific equipment and usage

• Regular maintenance helps ensure optimal performance and prol...read more

The standard of railway crossings for different voltage lines as per RDSO.

• RDSO specifies different standards for railway crossings based on the voltage of the lines.

• For 33 kV lines, the minimum height of the overhead equipment is 5.5 meters.

• For 11 kV lines, the minimum height of the overhead equipment is 5 meters.

• For 132 kV lines, the minimum height of the overhead equipment is 7 meters.

• For 440 kV lines, the minimum height of the overhead equipment is 9 meters.

• The standards a...read more

Differential potential of transformer is the voltage difference between the primary and secondary windings.

• It is a measure of the transformer's ability to isolate the primary and secondary circuits.

• It is important for safety and proper functioning of the transformer.

• The differential potential is affected by the turns ratio and the insulation between the windings.

• A high differential potential can cause arcing and damage to the transformer.

• Proper maintenance and testing can ens...read more

Minimum cover in column refers to the minimum distance between the outer surface of the reinforcement and the outer surface of the column.

• Minimum cover is typically specified in building codes and standards to ensure adequate protection for the reinforcement against corrosion.

• The minimum cover requirements may vary depending on factors such as the type of structure, environmental conditions, and the type of reinforcement used.

• For example, in reinforced concrete columns, the m...read more

SOP of RE projects involves defining project scope, identifying stakeholders, creating project plan, executing and monitoring progress.

• Define project scope and objectives

• Identify stakeholders and their requirements

• Create project plan with timelines and milestones

• Execute project plan and monitor progress

• Manage risks and issues

• Ensure quality control and compliance

• Close out project and conduct lessons learned

Admixture is a material other than water, aggregates, cement, and additives that is added to concrete or mortar to alter its properties.

• Admixtures can improve workability, durability, strength, or chemical resistance of concrete.

• Examples of admixtures include water reducers, accelerators, retarders, air-entraining agents, and superplasticizers.

• Admixtures are commonly used in construction to enhance the performance of concrete in various conditions.

The latest advancements in surveying engineering include the use of drones for aerial surveys, 3D laser scanning for detailed measurements, and GIS technology for data analysis.

• Use of drones for aerial surveys allows for faster and more accurate data collection.

• 3D laser scanning technology provides detailed measurements of structures and landscapes.

• GIS technology helps in analyzing and visualizing survey data for better decision-making.

• Advancements in GPS technology have impr...read more

The mixture composition used on airports for concreting typically includes cement, aggregates, water, and sometimes additives for specific properties.

• Cement: Typically Portland cement is used for its strength and durability.

• Aggregates: Usually a combination of coarse and fine aggregates such as crushed stone or gravel.

• Water: Used to hydrate the cement and form a workable mixture.

• Additives: Sometimes used to improve properties like strength, durability, or workability. For exa...read more

Grade of concrete refers to the strength of the concrete mix design.

• Grade of concrete is denoted by the ratio of cement, sand, and aggregates in the mix.

• Common grades of concrete include M20, M25, and M30.

• Higher grade concrete has higher strength and durability.

• Grade of concrete is specified in construction drawings or specifications.

25 kv Railway work involves the installation and maintenance of electrical systems for railway operations.

• Installation and maintenance of 25 kv electrical systems

• Ensuring safety protocols are followed

• Troubleshooting and resolving electrical issues

• Coordinating with team members and stakeholders

• Adhering to railway regulations and standards