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Electrical Systems 1 SACA Exam
Questions and answers 2025
Ground .- .CORRECT .ANSWER-The .connection .of .an .electrical .circuit .to .the .Earth.
Ten .rules .of .electrical .safety .- .CORRECT .ANSWER-A .set .of .guidelines .to .ensure .safe .practices .when .working .with .electricity.
Lockout ./ .tag .out .- .CORRECT .ANSWER-A .safety .procedure .used .to .disable .machinery .or .equipment .to .prevent .hazardous .energy .release.
Types .of .electrical .current .- .CORRECT .ANSWER-Direct .current .(DC) .and .alternating .current .(AC).
Circuit .tester .- .CORRECT .ANSWER-A .device .used .to .test .the .presence .of .voltage .in .an .electrical .circuit.
Components .of .an .electrical .circuit .- .CORRECT .ANSWER-Power .source, .load, .conductor, .and .control .device.
Types .of .power .supplies .- .CORRECT .ANSWER-DC .power .supply .and .AC .power .supply.
Schematic .symbols .- .CORRECT .ANSWER-Visual .representations .of .electrical .components .used .in .electrical .schematics.
Manual .switch .operators .- .CORRECT .ANSWER-Toggle .switch, .push .button .switch, .selector .switch, .key .switch, .and .rotary .switch.
Electrical .output .devices .- .CORRECT .ANSWER-Lamp, .motor, .solenoid, .buzzer, .and .relay.
Voltage .- .CORRECT .ANSWER-The .electrical .potential .difference .between .two .points .in .a .circuit. .Unit .of .measurement: .volts .(V).
Voltmeter .- .CORRECT .ANSWER-A .device .used .to .measure .voltage .in .an .electrical .circuit.
Voltage .characteristics .in .series .and .parallel .circuits .- .CORRECT .ANSWER-In .series .circuits, .voltage .adds .up. .In .parallel .circuits, .voltage .is .the .same .across .all .components.
Current .- .CORRECT .ANSWER-The .flow .of .electric .charge .in .a .circuit. .Unit .of .measurement: .amperes .(A).
Ammeter .- .CORRECT .ANSWER-A .device .used .to .measure .current .in .an .electrical .circuit.
Current .characteristics .in .series .and .parallel .circuits .- .CORRECT .ANSWER-In .series .circuits, .current .is .the .same .across .all .components. .In .parallel .circuits, .current .adds .up.
Ohmmeter .- .CORRECT .ANSWER-A .device .used .to .measure .resistance .in .an .electrical .circuit.
Resistance .characteristics .in .series .and .parallel .circuits .- .CORRECT .ANSWER- In .series .circuits, .resistance .adds .up. .In .parallel .circuits, .the .total .resistance .is .less .than .the .smallest .resistance.
Continuity .- .CORRECT .ANSWER-The .uninterrupted .flow .of .current .in .an .electrical .circuit.
Metric .prefixes .used .on .DMM .- .CORRECT .ANSWER-Mega .(M), .kilo .(K), .milli .(m), .micro. (μ).
Digital .multimeter .(DMM) .- .CORRECT .ANSWER-A .device .used .to .measure .voltage, .current, .and .resistance .in .an .electrical .circuit.
Basic .electrical .units .of .measurement .- .CORRECT .ANSWER-Volt .(V), .ampere .(A), .ohm. (Ω).
Series .and .parallel .resistance .- .CORRECT .ANSWER-The .calculation .of .total .resistance .in .series .and .parallel .circuits.
Ohm's .Law .- .CORRECT .ANSWER-A .mathematical .equation .relating .voltage, .current, .and .resistance .in .an .electrical .circuit.
Kirchhoff's .Voltage .Law .- .CORRECT .ANSWER-The .sum .of .voltage .drops .in .a .series .circuit .is .equal .to .the .applied .voltage.
Series .and .parallel .voltage .- .CORRECT .ANSWER-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
Testing .a .capacitor .- .CORRECT .ANSWER-Using .a .DMM .to .check .the .capacitance .and .integrity .of .a .capacitor.
Effect .of .a .capacitor .- .CORRECT .ANSWER-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 .- .CORRECT .ANSWER-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 .- .CORRECT .ANSWER-The .calculation .of .total .load .on .an .AC .circuit .with .capacitors.
Time .to .charge .and .discharge .a .capacitor .- .CORRECT .ANSWER-The .calculation .of .the .time .required .for .a .capacitor .to .charge .or .discharge.
Functions .of .capacitors .and .inductors .in .an .electric .power .supply .- .CORRECT .ANSWER-Capacitors .store .electrical .energy .and .provide .reactive .power, .while .inductors .store .magnetic .energy .and .provide .reactive .power.
Reactive .symbols .- .CORRECT .ANSWER-Symbols .used .to .represent .reactive .components .in .electrical .schematics.
Series-parallel .circuits .- .CORRECT .ANSWER-Combination .of .series .and .parallel .circuits .in .an .electrical .circuit.
Solving .a .combination .circuit .- .CORRECT .ANSWER-The .process .of .analyzing .and .calculating .the .values .of .components .in .a .combination .circuit.
Variable .resistors .- .CORRECT .ANSWER-Resistors .whose .resistance .can .be .adjusted.
Voltage .divider .network .- .CORRECT .ANSWER-A .circuit .arrangement .that .divides .the .input .voltage .into .smaller .voltages.
Troubleshooting .a .short .circuit .- .CORRECT .ANSWER-The .process .of .identifying .and .fixing .a .circuit .with .a .direct .connection .between .the .power .source .and .ground.
Troubleshooting .an .open .circuit .- .CORRECT .ANSWER-The .process .of .identifying .and .fixing .a .circuit .with .a .break .or .discontinuity.
Operation .of .a .transformer .- .CORRECT .ANSWER-A .device .that .transfers .electrical .energy .between .two .or .more .circuits .through .electromagnetic .induction.
Calculating .the .output .voltage .of .a .transformer .- .CORRECT .ANSWER-The .calculation .of .the .voltage .produced .by .a .transformer .based .on .the .turns .ratio.
Troubleshooting .a .transformer .- .CORRECT .ANSWER-The .process .of .identifying .and .fixing .issues .with .a .transformer .using .a .DMM.
Sizing .a .transformer .- .CORRECT .ANSWER-Determining .the .appropriate .size .of .a .transformer .based .on .the .voltage .and .load .requirements.
Calculating .transformer .power .loss .- .CORRECT .ANSWER-The .calculation .of .power .loss .in .a .transformer .due .to .resistance .and .magnetizing .current.
Calculating .the .current .load .- .CORRECT .ANSWER-The .calculation .of .the .current .drawn .by .a .load .connected .to .a .transformer.
Categories .of .transformers .- .CORRECT .ANSWER-Power .transformers .and .control .transformers.
Designing .a .control .transformer .circuit .- .CORRECT .ANSWER-Creating .a .circuit .using .a .control .transformer .to .achieve .a .specific .output .voltage.
Tap .on .the .secondary .of .a .transformer .- .CORRECT .ANSWER-A .connection .point .on .the .secondary .winding .of .a .transformer .that .allows .for .voltage .adjustment.
