Epiroc Project Engineer Interview Questions and Answers

Communication between PLC controllers and DCS involves establishing a reliable connection for data exchange.

• PLC controllers and DCS communicate through various communication protocols such as Modbus, Profibus, Ethernet/IP, etc.

• Data is exchanged between PLC controllers and DCS for process control and monitoring.

• Communication can be bidirectional, allowing both systems to send and receive data.

• Proper configuration and pr...read more

Environment conditions such as temperature, humidity, and cleanliness are crucial for panel installation.

• Temperature should be within specified range to prevent damage to components.

• Humidity levels should be controlled to avoid condensation and corrosion.

• Cleanliness is important to prevent dust and debris from affecting performance.

• Proper ventilation is necessary to prevent overheating.

• Avoid exposure to direct sunlight...read more

Restricted Earth Fault is a type of fault in electrical systems where the fault current is limited to a specific section of the system.

• Occurs when a fault current flows from a phase conductor to the earth through a restricted path

• Usually detected by a relay that monitors the current imbalance between the phase and neutral conductors

• Helps in quickly identifying and isolating the fault to prevent damage to equipment and ...read more

Differential earth fault is a type of fault in electrical systems where the current flowing into and out of the system is not equal due to an earth fault.

• Differential earth fault protection is used to detect such faults by comparing the current entering and leaving the system.

• It is important for safety as it helps prevent damage to equipment and potential electric shocks.

• Examples of differential earth fault protection ...read more

Transformer insulation class indicates the temperature at which the insulation can operate safely.

• Transformer insulation class is denoted by a letter (e.g. A, B, F, H) which corresponds to a maximum allowable temperature rise above ambient.

• Higher insulation classes can withstand higher temperatures, providing better protection for the transformer.

• Common insulation classes include A (105°C), B (130°C), F (155°C), and H

Implement a scheme using temperature sensors to detect transformer temperature.

• Install temperature sensors at key points on the transformer

• Set up a monitoring system to continuously track temperature readings

• Establish temperature thresholds for alerts and shutdowns

• Implement a cooling system to regulate temperature if needed

Voltage levels as per standards vary depending on the application and region, with common levels including 110V, 220V, and 415V.

• Voltage levels can vary depending on the application and region

• Common residential voltage levels include 110V and 220V

• Industrial voltage levels are typically higher, such as 415V

• International standards like IEC and ANSI provide guidelines for voltage levels

Molded Case Circuit Breakers (MCCBs) are types of circuit breakers that provide protection against overcurrents.

• Thermal-magnetic MCCB: Trips when a current overload or short circuit is detected.

• Electronic MCCB: Uses electronic components for more precise and adjustable protection.

• Compact MCCB: Smaller in size for limited space installations.

• Adjustable MCCB: Allows for manual adjustment of trip settings.

• Motor protection...read more

Factors to consider for lighting calculation include type of space, desired lighting levels, fixture efficiency, and lighting layout.

• Type of space (office, warehouse, retail, etc.)

• Desired lighting levels (measured in lux or foot-candles)

• Fixture efficiency (lumens per watt)

• Lighting layout (spacing and placement of fixtures)

• Natural lighting sources (windows, skylights)

• Color rendering index (CRI) for accurate color repres...read more