Turner Construction Interview Questions and Answers

Active power is the actual power consumed by a system, while reactive power is the power that oscillates between the system and the source.

• Active power is the real power consumed by electrical devices and is measured in watts (W).

• Reactive power is the power that flows back and forth between the source and the load, without performing any useful work.

• The combination of active power and reactive power gives the total power in an electrical system, known as apparent power.

• Power ...read more

Different types of temperature sensors include thermocouples, RTDs, thermistors, and infrared sensors. RTD stands for Resistance Temperature Detector and PT100 is a type of RTD.

• Thermocouples: measure temperature based on voltage produced by two different metals joined together

• RTDs (Resistance Temperature Detectors): measure temperature by changes in electrical resistance

• Thermistors: measure temperature based on changes in electrical resistance

• Infrared sensors: measure tempera...read more

BMS are systems that control and monitor building operations, such as HVAC, lighting, and security, to improve efficiency and occupant comfort.

• BMS integrate various building systems to centralize control and monitoring.

• They use sensors and actuators to collect data and adjust settings based on predefined parameters.

• BMS can optimize energy usage, reduce maintenance costs, and improve occupant comfort.

• Examples of BMS include Honeywell's Building Management System and Siemens De...read more

Modbus and BACnet are communication protocols used in Building Management Systems (BMS) to enable devices to communicate with each other.

• Modbus is a serial communication protocol commonly used for connecting industrial electronic devices. It is simple and easy to implement.

• BACnet is a protocol specifically designed for building automation and control networks. It allows different devices from different manufacturers to communicate with each other.

• Both Modbus and BACnet are us...read more

Forward flow is the direct action of the controller on the process, while backward flow is the feedback from the process to the controller in a PID control system.

• Forward flow is the control action that directly affects the process based on the setpoint and error signal.

• Backward flow is the feedback mechanism where the process output is compared to the setpoint to generate an error signal for the controller.

• In a PID control system, forward flow involves the proportional, inte...read more

Choose voice alarm system based on building size, occupancy, layout, and emergency response requirements.

• Consider building size and layout to determine coverage area

• Evaluate occupancy levels to ensure system can reach all occupants

• Assess emergency response requirements to determine necessary features

• Choose a system with clear and intelligible voice messages for effective communication

• Ensure system complies with relevant regulations and standards, such as NFPA 72

• Consider integ...read more

PID loops are a type of control loop feedback mechanism used in systems to maintain a desired setpoint by adjusting the process inputs.

• PID stands for Proportional-Integral-Derivative, which are the three control terms used in the loop.

• Proportional term responds to the current error value.

• Integral term deals with the accumulation of past errors.

• Derivative term predicts future errors based on the rate of change.

• PID loops are commonly used in industrial automation, robotics, and...read more