NCCER Electrical Review Questions Module 11 Questions and Answers | Latest Version | 2024/2025 | Graded A+

NCCER Electrical Review Questions Module 11 Questions and Answers | Latest Version | 2024/2025 | Graded A+ How does an overload relay protect a motor? An overload relay trips when a motor draws too much current for too long, protecting the motor from overheating and damage. What is the significance of voltage drop in electrical systems? Voltage drop is the loss of voltage as current flows through a conductor, which can affect the performance of devices and systems. What is the purpose of an electrical conduit? An electrical conduit protects and routes electrical wiring, shielding it from physical damage and environmental factors. What is the role of an ammeter in an electrical circuit? An ammeter measures the amount of current flowing through a circuit. 2 How does a voltmeter differ from an ammeter? A voltmeter measures the voltage between two points in a circuit, while an ammeter measures the current flow. What is the purpose of a Ground Fault Circuit Interrupter (GFCI)? A GFCI protects against electric shock by shutting off power when it detects a ground fault or current imbalance. What is the main advantage of using a three-phase electrical system? A three-phase system provides a more stable and efficient power supply, suitable for heavy machinery and industrial equipment. How does a step-up transformer differ from a step-down transformer? A step-up transformer increases voltage, while a step-down transformer decreases voltage for specific applications. What is the function of a junction box in electrical systems? 3 A junction box houses electrical connections, protecting them from damage and providing a secure place to connect wires. What is the significance of wire color coding in electrical systems? Wire color coding helps identify the function of each wire, such as live, neutral, or ground, ensuring proper and safe connections. What is the purpose of a contactor in an electrical circuit? A contactor is an electrically operated switch used to control high-power circuits, such as motors or lighting systems. How does a soft starter work in motor control? A soft starter gradually increases the voltage to a motor, reducing the initial inrush current and mechanical stress during startup.