Landmark Group IT Operations Manager Interview Questions and Answers

SLD distribution of electricity refers to the Single Line Diagram showing the distribution of electricity in a system.

• SLD is a simplified diagram that shows how electrical power is distributed within a system

• It includes components like transformers, circuit breakers, switches, and other electrical equipment

• SLD helps in understanding the flow of electricity and identifying potential issues in the system

Chiller types include air-cooled, water-cooled, and absorption chillers. Distribution involves piping systems to transfer chilled water. The refrigeration cycle consists of compression, condensation, expansion, and evaporation.

• Chiller types: air-cooled, water-cooled, absorption

• Distribution: piping systems for chilled water transfer

• Refrigeration cycle: compression, condensation, expansion, evaporation

Pressures in chiller are crucial for efficient operation and must be monitored regularly.

• Maintaining proper pressure levels is essential for chiller performance

• High pressures can indicate issues like blockages or overloading

• Low pressures can indicate refrigerant leaks or insufficient cooling capacity

The power formula for transformer current is P = VI. Transformer protections include overcurrent protection, overvoltage protection, and overtemperature protection.

• Power formula for transformer current: P = VI (where P is power, V is voltage, and I is current)

• Transformer protections include overcurrent protection to prevent excessive current flow, overvoltage protection to prevent voltage spikes, and overtemperature pr...read more

Fire pumps are used to increase water pressure for firefighting. They operate in a specific sequence to ensure proper water flow.

• Fire pumps are typically activated automatically when the pressure in the fire sprinkler system drops below a certain level.

• The sequence of operation for fire pumps usually involves starting the electric motor, engaging the pump, and building up pressure in the system.

• Pressure gauges are used...read more