FREE Certified Energy Auditor Certification MCQ Questions and Answers
The power factor rises when a capacitor bank is added to an electrical system with a lagging current because
Explanation:
Inductive loads cause a lagging current by increasing the reactive power necessary to create the magnetizing field necessary for their operation. Capacitor banks draw a current that follows the voltage and can reduce the overall amount of reactive power required.
Which of the subsequent systems would be ideal for measurements using a Bourdon gauge?
Explanation:
A mechanical pressure measurement tool is called a Bourdon gauge. To gauge the pressure in steam or hot water pipes, they are frequently installed in boiler systems.
What one of the following has no bearing on the lighting Coefficient of Utilization?
Explanation:
The Coefficient of Utilization is not affected by the type of lamp (Cu). The contribution of lamp light to the useful light at the work surface is measured by the coefficient of utilization or Cu. Useful light is lost when it is reflected in the wrong direction or gets trapped in the luminaire. It is also lost when a space has dark surfaces because they do not reflect light as well as surfaces that are lighter in color.
What is the most common kind of loss in an AC motor at full load?
Explanation:
Resistive losses in the stator and rotor are proportional to the square of the current through them multiplied by their resistance. When the load and current are at their maximum, this type of loss occurs most frequently in an AC motor.
Which of the following summaries of the energy auditing procedure most closely resembles an ASHRAE Level 1 audit?
Explanation:
A Level 1 energy audit is frequently the first step in determining the scope of later, more in-depth audits. The energy auditor will quickly scan a building to grasp its fundamental systems and operation before making recommendations for low- and no-cost upgrades as well as for more in-depth studies that are likely to be of sufficient value to the building's owner or occupant.
Which of the following waste water sources, which can be recycled, is not regarded as greywater?
Explanation:
Greywater is produced by sinks, showers, washers, and possibly dishwashers (dark greywater). The majority of the time, rainwater is collected and used for non-potable purposes, but with the right treatment, it can also take the place of potable water.
Which of the following can be used during an energy audit to evaluate both HVAC systems and the building envelope?
Explanation:
Chemical smoke can be used to find sources of air infiltration through the building fabric and to determine HVAC air flow patterns.