What is LOTO (Lockout-Tagout), and how is it applied in electrical systems? What is a UPS (Uninterruptible Power Supply), and how does it function? Can you explain the roles of a generator, chiller, condenser, and breakers in an HVAC system? What are LSIG settings, and how are they configured in circuit breakers? What are CRAH and CRAC units, and how do they differ in data center cooling? What are the types of expansion valves used in refrigeration systems, and how do they function? What is the difference between dry bulb and wet bulb temperatures, and why are they important in HVAC? Which types of refrigerants are commonly used in chillers, and what are their characteristics? What are ATS (Automatic Transfer Switch) and STS (Static Transfer Switch), and how do they operate? What are the main components of a VFD (Variable Frequency Drive), and how does it control motor speed? What is power factor, and why is it important in electrical systems? What is a transformer, and what is a vector group in transformers? What are the different types of fire suppression systems used in buildings? Can you explain the refrigeration cycle and its key components? What is the function of a governor in a generator, and how does it regulate speed? How can we increase or decrease the voltage output in a UPS? How can we verify that a circuit breaker is functioning correctly? What is risk assessment, and can you explain the process for electrical work? How do you apply LOTO procedures during transformer preventive maintenance (PM)? What is the power triangle, and how does it relate to electrical power? What are redundancy and scalability in electrical and data systems? What actions should you take if you see a fire in a building? What are BMS (Building Management Systems) and SCADA (Supervisory Control and Data Acquisition), and what are their components? Describe a situation where you had to complete a repair under a tight deadline. How did you manage your time?" "Can you describe a time when you encountered an unexpected problem with a piece of equipment? How did you diagnose the issue, and what steps did you take to resolve it?" "Describe a situation where you had to take responsibility for a task outside your normal duties. How did you manage it, and what was the result?" Tell me about a time when you were given a deadline but were unable to complete your work on time. What impact did this have on the business, and how did you handle the situation "Can you describe a situation where you identified a need for change and brought it to your manager’s attention, but they initially ignored your suggestion? How did you demonstrate the impact of not making the change, and what was the outcome?" Can you describe your experience with electrical safety procedures and protocols? How do you ensure safety when performing electrical and mechanical work? What types of personal protective equipment (PPE) have you used in your previous roles? How do you ensure that all safety devices are functioning correctly before starting work?
