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Apply right angle trigonometry to circuit analysis
Assessment Strategies
by completing a written assessment
Criteria
apprentice draws a right angle and names the three sides
apprentice writes three forms of the Pythagorean theorem
apprentice draws vectors used to represent the resistive, inductive, and capacitive value
apprentice determine the sine, cosine, and tangent for a variety of angles
apprentice solves for unknown values in a triangle
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Examine characteristics of alternating current
Assessment Strategies
by completing a written assessment
Criteria
apprentice defines terms related to AC
apprentice notes the significance and effect of the frequency
apprentice describes why AC is the preferred method of power distribution
apprentice identifies the characteristics of alternating current
apprentice calculates effective, peak, and average values
apprentice identifies the losses associated with alternating current
apprentice relates the term "phase" to AC current
apprentice calculates total resistance, total current, total power, the power factor, and the phase angle
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Use AC measuring instruments
Assessment Strategies
by completing a lab
by completing a written assessment
Criteria
apprentice uses a clamp-on ammeter
apprentice uses a multimeter
apprentice makes adjustments on an Oscilloscope
apprentice uses an Oscilloscope to make accurate measurements on a circuit
apprentice determines and records the level of a given voltage
apprentice determines a given frequency
apprentice connects the scope in the "dual trace mode" and measures the phase angle of two given voltages
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Analyze the nature of inductance
Assessment Strategies
by completing a written assessment
Criteria
apprentice defines inductance and lists its effects on alternating current
apprentice lists the physical factors that determine the amount of inductance
apprentice identifies inductors based on their core materials
apprentice calculates the total value of several inductors connected in both series and parallel
apprentice tests inductors using available test equipment
apprentice defines stray inductance and relates its significance to circuit operation
apprentice defines inductive reactance and describes its effects on AC
apprentice calculates the values of inductive reactance that results from given factors
apprentice defines reactive power (VARs)
apprentice draws an example of a sine wave depicting the relationship of an AC voltage and current across and inductor
apprentice explains how this phase shift occurs, relating to the effect of EMF and CEMF
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Examine the effects of a capacitor on AC circuits
Assessment Strategies
by completing a written assessment
Criteria
apprentice defines the terms capacitor, capacitance, and capacitive reactance
apprentice lists the physical factors that affect the capacitance of a capacitor
apprentice explains how voltage ratings affect capacitor application
apprentice calculates the total value of capacitance for series and parallel connected capacitors
apprentice lists the common types of capacitors which are categorized by their dielectrics
apprentice calculates the capacitive reactance of capacitors
apprentice compares the results of a capacitor connected in series with a lamp on an AC and DC circuit
apprentice calculates a capacitive time constant and the total time required to fully charge a capacitor
apprentice draws an example of a wave form depicting the voltage and current phase relationship of a pure capacitive circuit
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Analyze resistive-inductive series circuits
Assessment Strategies
by completing a written assessment
by building an R-L series circuit and recording information about the circuit in a lab report
Criteria
apprentice defines an R-L series circuit
apprentice lists the characteristics of an R-L series circuit
apprentice describes the relationship of resistance and inductive reactance
apprentice defines impedance
apprentice calculates the values of voltage, current, voltage drops, impedance, true power, apparent power, and power factor for an R-L circuit
apprentice draws examples of impedance and power triangles for circuits using vectors
apprentice builds examples of R-L series circuits given specifications
apprentice records information on the circuit in a lab report
lab report includes calculations of the expected circuit values for the circuit
lab report includes measures of the actual values of the circuit
lab report includes the identification of any differences
lab report includes justifications for the differences
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Analyze resistance-capacitive series circuits
Assessment Strategies
by completing the assessment for the competency
by building an R-C series circuit and recording information about the circuit in a lab report
Criteria
apprentice defines an R-C series circuit
apprentice lists the characteristics of an R-C series circuit
apprentice describes the relationship of resistance and capacitive reactance
apprentice defines impedance
apprentice calculates the values of impedance of a series R-C circuit from given values of resistance and reactance
apprentice calculates the values of voltage, current, voltage drops, impedance, true power, apparent power, and power factor for R-C circuits
apprentice draws examples of impedance and power triangles for circuits using vectors
apprentice builds examples of R-C series circuits given specifications
apprentice records information on the circuit in a lab report
lab report includes calculations of the expected circuit values for the circuit
lab report includes measures of the actual values of the circuit
lab report includes the identification of any differences
lab report includes justifications for the differences
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Analyze parallel reactive circuits
Assessment Strategies
by completing the assessment for the competency
by building R-L and R-C parallel circuits and recording information about the circuits in a lab report
Criteria
apprentice describes the phase relationship of voltage and current within parallel R-L and R-C circuits
apprentice calculates the values of voltage, current, impedance, power, and power factor for R-L and R-C circuits
apprentice computes the phase angles of given circuits and relates their values to the efficiencies of the circuits
apprentice draws examples of right triangles that represent the electrical relationships of given circuits using vectors
apprentice describes the effect that changing the frequency of a parallel reactive circuit will have on the values of a given reactive circuit
apprentice builds examples of R-L and R-C parallel circuits given specifications
apprentice records information on the circuit in a lab report
lab report includes calculations of the expected circuit values for the circuit
lab report includes measures of the actual values of the circuit
lab report includes the identification of any differences
lab report includes justifications for the differences
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Perform complex circuit analysis
Assessment Strategies
by completing the assessment for the competency
by building R-L-C series and parallel circuits and recording information about the circuits in a lab report
Criteria
apprentice describes the fundamental relationship of a series R-L-C circuit
apprentice calculates values of voltage, current, impedance, power, and power factor of an AC series R-L-C circuit
apprentice draws examples of triangular relationships of series R-L-C circuits using vectors and identifies the values indicated
apprentice defines series resonance and describe how circuit conditions change when the circuit is operated at a point above and below resonance
apprentice describes the fundamental relationships of a parallel R-L-C circuit
apprentice calculates values of voltage, current, impedance, power, and power factor of given AC parallel R-L-C circuits
apprentice draws examples of triangular relationships of given parallel R-L-C circuits and identifies the values indicated
apprentice defines parallel resonance and describes how circuit conditions change when the circuit is operated at a point above and below resonance
apprentice builds examples of R-L-C series and parallel circuits
apprentice records information on the circuits in a lab report
lab report includes calculations of the expected circuit values for the circuits
lab report includes measures of the actual values of the circuits
lab report includes the identification of any differences
lab report includes justifications for the differences
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Determine the proper three-phase system for a given application
Assessment Strategies
by completing the assessment for the competency
Criteria
apprentice describes the advantages of a three phase power systems
apprentice describes the phase relationship of three phase power systems
apprentice draws an example of a three phase wye connected generator or transformer
apprentice describes the significance of the value 1.73 to a three phase calculations
apprentice calculates the phase-to-phase and phase-to-line voltage values of a given wye system
apprentice calculates the phase-to-phase and phase-to-line current values of a given wye system
apprentice draws an example of a three phase delta connected generator or transformer
apprentice calculates the phase-to-phase and phase-to-line voltage values of a delta system
apprentice calculates the phase-to-phase and phase-to-line current values of a delta system
apprentice performs load calculation, voltage and current values, for a given three phase system where the source is connected in wye and the load is connected in wye
apprentice performs load calculation, voltage and current values, for a given three phase system where the source is connected in wye and the load is connected in delta
apprentice performs load calculation, voltage and current values, for a given three phase system where the source is connected in delta and the load is connected in wye
apprentice performs load calculation, voltage and current values, for a given three phase system where the source is connected in delta and the load is connected in delta
apprentice calculates the size (in CKVAR), necessary to correct the power factor of a three phase circuit