Specific Competencies and Skills Tested in this Assessment:
DC Electricity
Demonstrate the ability to identify and use the principles of the following:
- Ohm’s Law
- Kirchhoff’s Law
- Watt’s Law
- Series, parallel, series-parallel
- Capacitance
- Inductance
- Voltage cells
- Schematic symbols
- Time constants
AC Circuits
Demonstrate the ability to identify and use the principles of the following:
- Transformer action
- Resonance
- Voltage conversion (RMS, peak, etc.)
- Waveform analysis
- Degrees of displacement
- Reactance
- Impedance
- Filters
- Power factor
- Time/frequency
Fundamentals (covered in the performance test)
Demonstrate the ability to identify and use the principles of the following:
- Component identification
- Circuit characteristics
- Wiring specifications
- Circuit protection
Test Equipment
Demonstrate the ability to identify and use the principles of the following:
- Meter fundamentals
- Oscilloscope operation
- Digital meters
- Milliohm meter
- Transfer curve tracer
- IC analyzer
- Logic probe/pulser probe
Semiconductors
Demonstrate the ability to identify and use the principles of the following:
- Diode fundamentals (bipolar-zener applications)
- Transistor fundamentals
- Field effect transistor (FET) fundamentals
Electronic Circuits
Demonstrate the ability to identify and use the principles of the following:
- Transistor amplifier fundamentals
- Operational amplifier fundamentals
- Differentiator/integrator op-amps circuits
- Voltage regulators
- 555 Timers
- Power supplies
- Oscillators
- Phase-lock loop circuits
Digital/Micro
Demonstrate the ability to identify and use the principles of the following:
- Basic gates
- Boolean expression
- Gate circuits
- Logic specifications
- Circuit identification
- Counter circuits
- Microprocessor fundamentals
- Latches/flip-flops
- Binary numbering systems
Digital/Micro, continued
- Discrete gates
- D/A, A/D
- Multiplexers/demultiplexers
Transducers
Demonstrate the ability to identify and use the principles of the following:
- Thermistors
- Resistive temperature detectors (RTDs)
- Optical devices
- Thermocouples
- Proximity and resistive devices
Ladder Logic and Motors
Demonstrate the ability to identify and use the principles of the following:
- DC motors
- Synchro-systems
- AC induction motors
- Horsepower ratings
- Three-phase power
- Motor starter circuits
- Ladder diagrams
- JIC symbols
Safety
Demonstrate the ability to use principles of safety for the following:
- Personal/ shop/equipment
Programmable Logic Controllers
Demonstrate the ability to identify and use the principles of the following:
- PLC programming (ladder logic)
- PLC input/output capabilities
- PLC field wiring
- PLC trouble shooting
Written Assessment:
Administration Time: 3 hours
Number of Questions: 197
Areas Covered:
DC Electricity: 13%
AC Circuits: 13%
Test Equipment: 10%
Electrical Drawings: 13%
Digital/Macro: 13%
Transducer: 5%
Ladder Logic and Motors: 5%
Safety: 10%
Programmable Logic Controllers (PLC): 5%
Sample Questions:
A positive ion is produced when an atom
- loses an electron
- loses a proton
- gains an electron
- gains a proton
If a transformer with a 1:5 ratio is rated at 500 volt-amperes and has an input voltage of 100 volts, what would be the output current assuming 100 percent efficiency?
- 1.0 amp
- 2.5 amps
- 5 amps
- 25 amps
To remove a DC offset from the output of a frequency generator connected to a test circuit, the technician must
- change the DC bias on the test circuit
- place at capacitor in series with the output of the generator and the test circuit
- change the scope probe setting to times 10
- set the scope to measure AC
The junction field effect transistor (JFET) operates in the ___________ mode.
- depletion
- enhancement
- depletion or enhancement
- depletion and enhancement
A 4-input NOR gate has how many possible input conditions?
- 2
- 4
- 8
- 16
Two 40-microfarad capacitors rated at 150 volts each, connected in series, would have a combined rating of
- 20 microfarads at 150 volts
- 20 microfarads at 300 volts
- 80 microfarads at 300 volts
- 80 microfarads at 150 volts
Inductance is the electrical property that
- opposes DC more than AC
- converts electricity into heat
- opposes changes in current
- opposes changes in voltage
The DIAC is also known as a
- unilateral switch
- bilateral switch
- Zener diode
- blocking oscillator
An SCR is basically a
- silicon transistor with a base, emitter, and collector
- PNPN device with four leads attached to the four layers
- PNPN device with a gate, cathode, and anode leads
- three layer device with a gate, base, and anode
A transducer is a device that
- conveys a process variable from one point to another
- transmits a signal from a sensing element to an instrument
- converts low mechanical power to a higher level of power
- converts one form of energy into another
Performance Assessment:
Administration Time: 3 hours
Number of Jobs: 7
Areas Covered:
14% Semiconductor Testing
Identification of components; determination of component quality and lead configuration; use of test equipment, and time to complete Job 1.
14% Soldering/De-soldering
Techniques for soldering and de-soldering components; choice, preparation and use of tools and equipment; safety, and time to complete Job 2.
14% Test Equipment
Use of meters; measurement of voltage, resistance, current; use of schematic, and time to complete Job 3.
14% Circuit Construction
Principles of AC and DC electricity; use of schematics; assembly procedures and techniques; component selection; safety, and time to complete Job 4.
16% Oscilloscope Usage
Use and care of equipment; calibration procedures; AC and DC measurements; interpretation of waveforms; use of schematics, and time to complete Job 5.
14% Troubleshooting
Problem diagnosis; identification of components (satisfactory or defective); use of test equipment; procedures and techniques for restoring circuit operation, and time to complete Job 6.
14% Digital/Micro
Application of gate logic; gate substitution; use of diagram; circuit construction; creation of truth table; observation techniques, and time to complete Job 7. Sample Job: Test Equipment
Maximum Time: 25 minutes
Participant Activity: The participant will measure the voltage drop, the current and the resistance for each resistor. Then the total voltage, current and resistance will be measured for the entire circuit.