Many tools designed to improve a power supply’s quality are not only among the first to suffer from a lack of quality, but are sometime ? To the problems they are intended to resolve.

Companies invest in additional back-up equipment that adds to the demand on the power supply and is sensitive to ? In the system

While IT devices can be made more efficient, business’s ever-growing reliance on IT still results in a net decrease in the use of electrical power

To what can the underlying cause of most power quality problems be traced?

Which of the following electrical theory law is NOT used to trace the source of most PQ-related problems?

Harmonic currents are induced by loads that draw current in a(n) ? Wave form

RMS(effective) voltage variations due to PQ phenomena are often referred to as ?

A(n) ? Is a decrease from the nominal voltage supply level.

Recent surveys have shown that sags are the most likely type of power quality disturbanc

The PQ phenomena classification that encompasses harmonics, inter harmonics, voltage fluctuations, notching, and DC offsets is wave form ?

A(n) ? Is one who is familiar with the construction and operation of the equipment and the hazards involved

The use of proper personal protective equipment is intended to ? Injury.

Which of the following are among the top responses from electrical workers when asked what kinds of unsafe things electrical workers do?

Which of the following are likely reasons that an electrical worker may work unsafely

? Accounts for 24% of electrical activities being performed at the time of an accident that resulted in injuries

It is usually wise to have the ? Tool doing the monitoring until the source of the problem can be narrowed down

A 3% voltage imbalance between phases may result in the need to derate electric motors by ?

Both the voltage imbalance and harmonics are generally considered as ? Power quality problems

The ability to set a monitoring device to ? Automatically when a power quality event occurs allows one to analyze the courses of the problem

Portable PQ monitors can provide graphical displays of wave forms and trending information for ? Parameters

Permanently-installed power quality monitoring systems are typically ? And provide the advantage of showing trends

The ? Is one of the most popular tools for PQ monitoring because it does not require contact with energized circuits

A power quality PQ instrument should be rated for the ? Range of voltage and current levels

When accurate measurements are needed on sinusodial waveforms to detect distortions only ? Should be used

What step(s) may be needed to ensure that the (PQ) instrument does not have any significant impact on the measurements themselves?

Data collection and analysis will vary depending upon whether one is conducting a(n) ? Exercise

Monitoring to establish a benchmark should be conducted for at least ? To get a more complete picture of the electrical supply

DC offsets more than a percent or two of the ? Voltage can have adverse effects on transformers

If the cumulative probability (CP) value obtained from an analysis study continues to increase. , what results can be expected?

If harmonic distortion was noticeably larger on a single phase when compared to all phases, what would an intuitive be for the increase in total harmonic distortion (THD)

What is the likely direction or source of the fault condition if the current increases significantly when the voltage decreases?

When measuring equipment efficiency, monitoring should be conducted over the ? Because the efficiency varies as a function of load

Improperly grounded communication cables between peripherals and the main frame computer may become a problem when exposed to strong level RF signals through ? .

The combination of a computer and a copier on the same circuit could in and of itself be a problem, even if each were performing correctly, what is a possible solution to potential interference m?

Although ? Faults do not have enough current flow for the fuse or the distribution breaker to operate, they can result in the lights blinking

Well grounded, properly-sized UL listed ? should be installed on any metallic interface that extends outside a structure, including the incoming electric service, phone lines, and any exterior branch circuits

On a single phase circuit, the origin of a voltage sag is usually ? significantly during the sag

Sag is the sum of the ? in both the line (hot) and neautral (grounded) wires

What type of power supply will have a sharp reduction in current at the beginning of a sag, followed by an increase in current to a value greater than the original current level, until the sag has ended or the equipment trips off line?

What is a likely source of data that seems to contradict logic and/or physical properties?

A common source of incorrect data comes from not using current probes withing their ratings

Learning which mitigation solutions will work for which power quality (PQ) phenomena can be studied from the phenomena side or the solution side

Which of the following is NOT a classification for PQ phenomena

When trouble shooting a (PQ) problem, one discovers that the neutral-to-ground voltage is >1% of nominal V at the distribution panel. What is the possible cause of the problems?

A(n) ? is an increase in the voltage level