Consumption of electrical energy is registered on which device?

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The correct answer is a watt-hour meter because it specifically measures the total amount of electrical energy consumed over time. It quantifies energy use in watt-hours, allowing facilities and individuals to track their energy consumption effectively. This is particularly important in sewage treatment facilities, where understanding energy usage can lead to improved efficiency and cost savings.

A watt-hour meter continuously records the electrical energy that flows through the system, making it the ideal device for monitoring energy consumption. This information can be crucial for analyzing operational costs and implementing energy-saving measures.

In contrast, a volt-ohm meter is used for measuring voltage and resistance, an ammeter measures the current in amperes, and an ohm meter is utilized for measuring resistance in ohms. While these devices serve important roles in electrical diagnostics, they do not quantify energy consumption, making them unsuitable for answering the question about registering energy usage.