Practice Test GeeksSE Engr. - Solar Energy Engineering Certification Practice Test
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Testing Methods Flashcards

7 cards from real SE ENGR. practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. Which standard defines the commissioning tests and documentation requirements for grid-connected PV systems?

    Answer: IEC 62446-1

    IEC 62446-1 specifies system documentation, commissioning tests, and inspection requirements for grid-connected PV systems.

  2. Standard Test Conditions (STC) for PV modules specify which combination?

    Answer: 1000 W/m², 25°C cell temperature, AM1.5

    STC is 1000 W/m² irradiance, 25°C cell temperature, and an AM1.5 spectrum.

  3. During an I-V curve trace, a pronounced step or notch in the curve most commonly indicates what?

    Answer: Shading or a mismatched/bypassed cell group

    Steps in the I-V curve appear when bypass diodes activate because of shading, cracked cells, or mismatch.

  4. A reduced slope near Voc on an I-V curve (a 'tilted' right side) is primarily a symptom of what?

    Answer: Increased series resistance

    Higher series resistance, such as from corroded connectors or solder bond failures, flattens the curve near Voc and reduces fill factor.

  5. An insulation resistance test on a PV array is typically performed by applying a DC test voltage between which points?

    Answer: Shorted array positive/negative conductors and ground

    IEC 62446-1 insulation resistance testing applies voltage between the array conductors (often shorted together) and earth.

  6. Which safety precaution is essential before shorting PV string conductors for an insulation resistance test?

    Answer: Use a rated shorting switch/device and isolate the string from the inverter

    Shorting live DC strings requires a properly rated shorting device with the string isolated to avoid arcing hazards.

  7. When measuring string open-circuit voltage, why is it compared against a temperature-corrected expected value?

    Answer: Voc decreases as cell temperature rises

    Voc has a negative temperature coefficient, so the measured value must be corrected to be compared fairly with the expected value.