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SACA C201 ELECTRICAL SYSTEMS (ACTUAL
) CERTIFICATION STUDY GUIDE QUESTIONS
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Discharging a capacitor ---answers----the process of releasing the stored electrical energy in a capacitor. Testing a capacitor ---answers----using a dmm to check the capacitance and integrity of a capacitor. 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.
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.
Designing a control transformer circuit ---answers---- creating a circuit using a control transformer to achieve a specific output voltage. Tap on the secondary of a transformer ---answers a connection point on the secondary winding of a transformer that allows for voltage adjustment. Ground ---answers----the connection of an electrical circuit to the earth. Ten rules of electrical safety ---answers----a set of guidelines to ensure safe practices when working with electricity. Lockout / tag out ---answers----a safety procedure used to disable machinery or equipment to prevent hazardous energy release. Types of electrical current ---answers----direct current (dc) and alternating current (ac). Circuit tester ---answers----a device used to test the presence of voltage in an electrical circuit. Components of an electrical circuit ---answers power source, load, conductor, and control device.
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.
Total inductance and inductive reactance ---answers -----------------------------------------------------------------------the calculation of total inductance and inductive reactance in series and parallel circuits. Ac circuit with inductors ---answers----the calculation of total load on an ac circuit with inductors. Capacitance ---answers----the ability of a component to store electrical energy in an electric field. Unit of measurement: farads (f). Types of capacitors ---answers----electrolytic capacitor, ceramic capacitor, and film capacitor.
