Meters
What category of electric meter is intended only for measurement inside an appliance
What is Category I
What could happen to an analog meter if too high a voltage is tested?
What is If too high a voltage is being tested for the scale setting, then the meter can be damaged.
This test instrument reads current in an electrical circuit.
What is Ammeter
Where does the current come from for resistance measurements on an ohmmeter?
What is The battery inside the meter
What can cause a non-linear power?
What is Semiconductors circuits
What category of electric meter is intended for measurement at the electric meter base?
What is Category IV
What is a transient voltage?
What is A momentary surge or spike of voltage can be several times the normal circuit voltage.
What is The range of an electric meter describes:
What is How low and high the meter will read for each function
What is An ohmmeter is set on continuity and beeps when the leads are connected to a circuit. This indicates that:
The path is complete. It has no breaks in it
What is Wattmeters read true power in a circuit. This can be expressed by what equation?
What is Power = amps × voltage × power factor
One advantage of digital meters is:
What is There is no need to interpret the scale.
Where are transient voltages most dangerous?
What is The closer you are working to the power pole or main power box, the more dangerous transient spikes can be.
How are voltmeters connected to read the voltage drop across a load in a circuit?
What is Voltmeters are connected in parallel with the load.
What scales on analog meters require battery power to operate?
What is only the OHMs scale
What is a common application for data logging instruments?
What is Identifying intermittent problems
What part of an analog scale gives the most accurate reading?
What is The midpoint of the scale
The safest way to use a meter while testing for voltage is to:
What is always work on a de-energized circut
How are clamp-on ammeters used?
What is They are clamped around one of the power wires feeding the circuit.
What is Capacitance meters measure the capacitance in a circuit or in a start capacitor. This is measured in what unit?
Microfarads
When is it important to match the polarity of the meter leads to the polarity of the circuit being tested?
When reading DC voltage
What do the letters RMS stand for?
What is Root Mean Square
How can a technician determine what the proper PPE is for a particular application?
What is Read NFPA Standard 70E
How are inline ammeters connected to read the current in a circuit?
What is They are connected in series with the load.
What does a wattmeter read?
What is It reads true power, including an allowance for the power factor.
With its leads on either side of a switch, a voltmeter reads 120 V. This indicates that
What is The switch is open, so voltage cannot pass through.