FREE Certified Energy Auditor Certification MCQ Questions and Answers

Question 1

Which of the subsequent systems would be ideal for measurements using a Bourdon gauge?

Accepted Answer

Boiler

Answer

A Bourdon gauge is a type of mechanical pressure gauge commonly used to measure high pressures in various industrial applications. Boilers operate under high pressure to generate steam, making a Bourdon gauge an ideal instrument for monitoring and ensuring safe operating pressures within boiler systems. It is not typically used for building envelopes, lighting, or electrical supply.

Question 2

The power factor rises when a capacitor bank is added to an electrical system with a lagging current because

Accepted Answer

total reactive power is decreased

Answer

A lagging power factor in an electrical system is typically caused by inductive loads, which draw reactive power. Adding a capacitor bank introduces capacitive reactive power, which counteracts the inductive reactive power. By reducing the net reactive power in the system, the power factor improves (moves closer to 1), making the system more efficient.

Question 3

What one of the following has no bearing on the lighting Coefficient of Utilization?

Accepted Answer

The type of lamps used

Answer

The Coefficient of Utilization (CU) is a measure of how efficiently a luminaire delivers light to a working plane, taking into account room geometry and surface reflectances. It depends on the dimensions of the space, the reflectance of walls, ceiling, and floor, and the type of luminaire. The *type of lamps used* (e.g., LED, fluorescent) primarily affects the lumen output and efficacy, but not the CU itself, which is about light distribution within the space.

Question 4

What is the most common kind of loss in an AC motor at full load?

Accepted Answer

Resistive losses

Answer

At full load, the most significant losses in an AC motor are typically resistive losses, also known as copper losses (I²R losses). These occur in the stator and rotor windings due to the resistance of the conductors and the current flowing through them. While core losses, friction, windage, and stray load losses also contribute, resistive losses usually dominate at full load.

Question 5

Which of the following can be used during an energy audit to evaluate both HVAC systems and the building envelope?

Accepted Answer

Chemical smoke

Answer

Chemical smoke, often generated by smoke pencils or theatrical smoke machines, is an excellent tool for visualizing air movement. It can be used to detect drafts and air leaks in the building envelope (e.g., around windows, doors, insulation gaps) and to trace airflow patterns within HVAC systems (e.g., checking duct leakage, verifying ventilation effectiveness). This makes it useful for both aspects.

Certified Energy Auditor Certification Practice Test

Certified Energy Auditor Certification Practice Test

FREE Certified Energy Auditor Certification MCQ Questions and Answers