CEM Exam Dumps - Certified Energy Manager (CEM)

Amanometeris used to measurepressure, particularly in gases and liquids.

Step 1: Analysis of Each Option

Pressure (A):✅Correct. Manometers are commonly used in HVAC, industrial, and lab applications.

Volume (B):❌Incorrect. Volume is measured using flow meters or tanks.

Distance (C):❌Incorrect. Distance is measured using rulers or lasers.

Voltage (D):❌Incorrect. Voltage is measured using voltmeters.

Thus, the correct answer isA. Pressure.

APitot tubemeasuresflow rateby determining thepressure differentialin a fluid.

Why is a Pitot Tube the Correct Answer?

It measuresdynamic pressureandstatic pressurein a moving fluid.

Using Bernoulli’s equation, it calculatesvelocityandflow rate.

Analysis of Other Options:

Psychrometer (A):Measures humidity, not flow rate.

Infrared camera (B):Detects temperature differences, not pressure.

Hot-wire anemometer (C):Measures air velocity using heat dissipation, but not pressure differential.

Ultrasonic flow meter (E):Measures flow using sound waves, not pressure.

Thus, the correct answer isD. Pitot tube.

Monitoring energy consumption is a critical component of effective energy management. It serves multiple purposes that collectively enhance an organization's ability to control energy use, identify inefficiencies, and implement improvements. These purposes include:​

Establishing a Basis of Management Control:By systematically tracking energy consumption, organizations create a foundation for managing energy use effectively. This data enables the setting of benchmarks and performance indicators, facilitating informed decision-making and strategic planning.

Identifying Deviations in Energy Consumption Patterns:Continuous monitoring allows for the detection of anomalies or unexpected changes in energy usage. Recognizing when and why these deviations occur is essential for diagnosing potential issues, such as equipment malfunctions or operational inefficiencies, and addressing them promptly.

Supporting Analysis of Energy Information:Comprehensive energy data collection supports detailed analysis, aiding in understanding consumption trends, evaluating the impact of energy conservation measures, and identifying opportunities for further efficiency improvements.

Given that monitoring energy consumption fulfills all the above functions, the correct answer is D. All of the above.

The Institute of Electrical and Electronics Engineers (IEEE) Standard 519, titled "Recommended Practices and Requirements for Harmonic Control in Electrical Power Systems," sets forth guidelines to maintain the quality of electrical power by limiting harmonic distortions. According to IEEE 519, for general low-voltage systems (defined as systems with a voltage less than 600 volts), the Total Harmonic Distortion (THD) of the voltage waveform should not exceed 5%. This threshold ensures the reliable operation of electrical equipment and minimizes potential issues such as overheating or malfunctioning caused by excessive harmonics. Therefore, the correct answer is C. Less than 5%.