What can cause the supply voltage to a system to drop below the minimum voltage when the unit is operated?
A) The system may be low on refrigerant, causing a high amp draw as the compressor struggles to cool the structure.
B) A dirty air filter may be causing a high evaporator fan motor amp draw.
C) Power wire is too small or poor connections at either end of the power wire
D) This is normal. The minimum voltage only refers to the voltage with the unit off.
C
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The plug-in unit size of a bus plug is based on the ____.
A. switch ampere rating B. protective devices rating C. number of bus plugs required D. number of end connections
A customer in the estimate stage refuses the automotive maintenance suggestions. The service consultant should which of the following?
A. Give up and never try to ask again B. Call the customer’s spouse and ask the spouse C. Ask again when there is another opportunity at a future customer service system stage D. Tell the service manager to ask the customer
What causes the conductive surface area of the cable to decrease as signal frequencies increase?
A. Characteristic Impedance B. Changes in temperature C. Skin effect D. Bend radius
The formula for characteristic impedance for high frequency transmission lines shows
A) line length is not a factor B) impedance is proportional to shunt capacitance C) line length is the primary factor D) impedance is proportional to series inductance