ASVAB Study GuideElectronics Information Practice Test 8
Tap an answer to check it instantly and read the explanation. 10 questions: 3 easy, 4 medium and 3 hard.
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Question 1 easy
In a standard electrical circuit diagram, how is a crossover of two wires that are NOT connected typically represented?
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Correct answer: A — a wire jumping over another with a small bridge loop (or plain crossing without a dot)
In schematic diagrams, wires crossing without a junction dot (or using a semi-circular bridge loop) indicate that the conductors pass each other without electrical contact.
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Question 2 easy
According to standard North American electrical wiring codes (NEC), which color is reserved for the equipment grounding conductor?
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Correct answer: C — green or bare copper
Under the National Electrical Code (NEC), green insulated wires or bare copper wires are strictly designated for protective grounding.
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Question 3 easy
What component is represented by a schematic symbol consisting of two parallel lines of equal length separated by a small gap?
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Correct answer: A — capacitor
The basic schematic symbol for a capacitor consists of two parallel plate lines separated by a small space, representing its conductive plates and dielectric gap.
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Question 4 medium
What electrical component is represented in schematic diagrams by a series of curved semi-circular loops or bumps?
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Correct answer: D — inductor
An inductor (coil) is represented in electronic schematics by a series of coiled loops or curved arcs, symbolizing wire wound around a core.
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Question 5 medium
According to standard electrical wiring color codes, which wire color serves as the neutral conductor in a 120V AC household circuit?
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Correct answer: B — white or gray
In standard AC household wiring, white or gray insulation identifies the neutral wire, which completes the circuit by carrying current back to the power source.
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Question 6 medium
Which schematic symbol represents an alternating current (AC) voltage source?
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Correct answer: B — a circle containing a single sine wave curve (~)
An AC voltage source is universally represented in circuit diagrams by a circle enclosing a sine wave symbol (~), indicating a constantly oscillating voltage.
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Question 7 medium
In an electromechanical relay symbol, what does the abbreviation 'NC' stand for regarding its switch contacts?
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Correct answer: A — Normally Closed
NC' stands for Normally Closed, meaning the contact pair remains connected when the relay coil is unpowered (de-energized).
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Question 8 hard
On a 4-band resistor, what specific information is conveyed by the fourth color band located furthest to the right?
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Correct answer: C — resistance tolerance percentage
In a standard 4-band resistor color code, the fourth band indicates the tolerance percentage (e.g., Gold = ±5%, Silver = ±10%), showing how close the actual resistance is to its nominal value.
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Question 9 hard
When calculating resistance values using standard color codes, which color range represents a multiplier of $$10^2$$ (hundreds)?
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Correct answer: D — red
According to the electronic color code (Black=0, Brown=1, Red=2), Red represents the digit 2, making its multiplier $$10^2 = 100$$
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Question 10 hard
In electronic schematic design, how is a chassis ground symbol distinguished from an earth ground symbol?
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Correct answer: B — chassis ground uses a diagonal rake/comb or frame symbol, whereas earth ground uses decreasing parallel lines
A chassis ground symbol represents a connection to the metal enclosure/frame of a device (often shown as pitchfork/comb teeth), whereas an earth ground represents a direct physical connection to the soil.