Plant Operation Test 2025 – 400 Free Practice Questions to Pass the Exam

To determine the energy efficiency of equipment, the most effective method involves comparing the output performance to the input energy consumption. This approach provides a quantitative analysis of how much useful work or output is produced in relation to the energy consumed. For instance, if an electric motor uses a certain amount of electricity to produce mechanical power, analyzing the ratio of these values reveals its efficiency. High efficiency indicates that a greater portion of input energy is converted into useful work, while lower efficiency suggests significant energy losses.

The other methods listed do not provide a reliable measure of energy efficiency. Observing the operating sound may give insights into equipment health or performance but doesn’t quantify energy use versus output. Surveys of operator satisfaction gauge user experience rather than equipment efficiency, and measuring the equipment’s weight does not relate to energy consumption or performance at all. Thus, the most accurate way to evaluate efficiency lies in the relationship between the energy consumed and the effective work produced.