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20 Cards in this Set
- Front
- Back
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What is the purpose of the green conductor in a power tool or appliance cable?
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To prevent electrical shock to the operator in case there is an electrical short to the frame of the appliance or tool.
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What do the different portions of a cable with the tag "C-MB144" stand for?
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C- service
MB- Circuit letters 144- Cable number |
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A pictorial diagram is used to indentify what?
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Components of a system
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An isometric diagram is used to identify what?
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Where components are in a system
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What type of diagram is used to present a general description of a system and its functions?
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Block diagram
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What type of diagrams shows electrical connections and functions of a specific circuit arrangement through graphic symbols?
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Schematic diagram
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What type of diagram must be used in conjunction with a schematic diagram to troubleshoot a system in order to find test points for voltage and resistance checks?
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Wiring diagram
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At what voltage should you not hold test probes when testing a circuit?
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300V
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What type of plastics are common in electrical insulation?
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Fluoroplastics
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What is the main precaution to take when soldering cable or wire with fluoroplastic insulation?
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Have adequate venitlation.
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What are the 4 basic parts of a power supply?
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Transformer, rectifier, filter, and regulator.
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What type of rectifier outputs pulses of DC that are separated by a period of on half cycle of zero potential voltage?
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Half-wave
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The use of a center-tapped, high-voltage secondary is a characteristic of what type of rectifier?
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Full-wave
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What type of voltage regulators use a variable resistance placed in parallel with the load?
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Shunt regulators
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What type of filters use a choke to filter the pulsating DC input?
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Inductor filters
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What type of filter uses both capacitive and inductive filters?
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pi filters
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What type of rectifier's dc output voltage is equal to the input voltage from the high-voltage secondary of the power transformer?
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Bridge rectifier
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What is the purpose of a current regulator?
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To provide a constant current regardless of changes in the input voltage or load current.
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What are used primarily to develop high voltages where low current is required?
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Voltage multipliers
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What are the two most widely used checks in testing electronic equipment?
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Visual checks and signal tracing.
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