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SACA C201 ELECTRICAL SYSTEMS CERTIFICATION STUDY
GUIDE QUESTIONS AND ANSWERS (ACTUAL 2025/2026)
Current ---Answers----the flow of electric charge in a circuit. Unit of measurement: amperes (a).
Ammeter ---Answers----a device used to measure current in an electrical circuit.
Current characteristics in series and parallel circuits ---Answers----in series circuits, current is the same across all components. In parallel circuits, current adds up.
Ohmmeter ---Answers----a device used to measure resistance in an electrical circuit.
Resistance characteristics in series and parallel circuits ---Answers----in series circuits, resistance adds up. In parallel circuits, the total resistance is less than the smallest resistance.
Continuity ---Answers----the uninterrupted flow of current in an electrical circuit.
Metric prefixes used on dmm ---Answers----mega (m), kilo (k), milli (m), micro (μ).
Digital multimeter (dmm) ---Answers----a device used to measure voltage, current, and resistance in an electrical circuit.
Basic electrical units of measurement ---Answers----volt (v), ampere (a), ohm (ω).
Series and parallel resistance ---Answers----the calculation of total resistance in series and parallel circuits.
Ohm's law ---Answers----a mathematical equation relating voltage, current, and resistance in an electrical circuit.
Kirchhoff's voltage law ---Answers----the sum of voltage drops in a series circuit is equal to the applied voltage.
Series and parallel voltage ---Answers----in a series circuit, the current flows through all the components in the same path. As a result, the total voltage across the circuit is equal to the sum of the voltages across each of the components.
In a parallel circuit, the current can flow through multiple paths. As a result, the voltage across each of the components in a parallel circuit is the same. The total current in the circuit is equal to the sum of the currents through each of the components.
Power ---Answers----the rate at which work is done or energy is transferred in an electrical circuit. Unit of measurement: watts (w).
Total power ---Answers----the calculation of total power in a circuit.
Kirchhoff's current law ---Answers----the sum of currents entering a node is equal to the sum of currents leaving the node.
Series and parallel current ---Answers----the calculation of total current in series and parallel circuits.
Circuit protection ---Answers----devices used to protect electrical circuits from overcurrent or short circuits.
Effect of a capacitor ---Answers----in a dc circuit, a capacitor blocks dc and allows ac to pass. In an ac circuit, a capacitor causes a phase shift between voltage and current.
Total capacitance and capacitive reactance ---Answers----the formula for calculating total capacitance in series is: c_t = 1/(1/c1 + 1/c2 + ... + 1/cn). For connected in parallel, the total capacitance is the sum of the individual capacitances. The formula for calculating total capacitance in parallel is:
C_t = c1 + c2 + ... + cn
Ac circuit with capacitors ---Answers----the calculation of total load on an ac circuit with capacitors.
Time to charge and discharge a capacitor ---Answers----the calculation of the time required for a capacitor to charge or discharge.
Functions of capacitors and inductors in an electric power supply ---Answers---- capacitors store electrical energy and provide reactive power, while inductors store magnetic energy and provide reactive power.
Reactive symbols ---Answers----symbols used to represent reactive components in electrical schematics.
Series-parallel circuits ---Answers----combination of series and parallel circuits in an electrical circuit.
Solving a combination circuit ---Answers----the process of analyzing and calculating the values of components in a combination circuit.
Variable resistors ---Answers----resistors whose resistance can be adjusted.
Voltage divider network ---Answers----a circuit arrangement that divides the input voltage into smaller voltages.
Troubleshooting a short circuit ---Answers----the process of identifying and fixing a circuit with a direct connection between the power source and ground.
Troubleshooting an open circuit ---Answers----the process of identifying and fixing a circuit with a break or discontinuity.
Operation of a transformer ---Answers----a device that transfers electrical energy between two or more circuits through electromagnetic induction.
Calculating the output voltage of a transformer ---Answers----the calculation of the voltage produced by a transformer based on the turns ratio.
Troubleshooting a transformer ---Answers----the process of identifying and fixing issues with a transformer using a dmm.
Sizing a transformer ---Answers----determining the appropriate size of a transformer based on the voltage and load requirements.
Calculating transformer power loss ---Answers----the calculation of power loss in a transformer due to resistance and magnetizing current.
Calculating the current load ---Answers----the calculation of the current drawn by a load connected to a transformer.
Categories of transformers ---Answers----power transformers and control transformers.
Electrical output devices ---Answers----lamp, motor, solenoid, buzzer, and relay.
Voltage ---Answers----the electrical potential difference between two points in a circuit. Unit of measurement: volts (v).
Voltmeter ---Answers----a device used to measure voltage in an electrical circuit.
Voltage characteristics in series and parallel circuits ---Answers----in series circuits, voltage adds up. In parallel circuits, voltage is the same across all components.
Types of capacitors ---Answers----electrolytic capacitor, ceramic capacitor, and film capacitor.
