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100+ Free NV C-2G Photovoltaics Practice Questions

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2026 Statistics

Key Facts: NV C-2G Photovoltaics Exam

75 Q

Official Exam Questions

PSI Nevada Contractor CIB updated 3/25/2026

56 of 75 points

Passing Score

PSI Nevada Contractor CIB updated 3/25/2026

150 minutes

Time Allowed

PSI Nevada Contractor CIB updated 3/25/2026

USD 95

PSI Exam Fee (one portion)

PSI Nevada Contractor CIB updated 3/25/2026

Open Book

Book Policy

PSI Nevada Contractor CIB updated 3/25/2026

Nevada C-2G Photovoltaics Contractor Examination is the official NSCB/PSI open book exam: 75 questions, 56 of 75 points, 150 minutes, USD 95 (bulletin 270, updated 3/25/2026). Official delivery: English.

Sample NV C-2G Photovoltaics Practice Questions

Try these sample questions to test your NV C-2G Photovoltaics exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1A photovoltaic cell produces electricity primarily because photons absorbed in a semiconductor p-n junction:
A.Free electron-hole pairs that the built-in electric field separates into a usable current
B.Heat the junction until thermoelectric voltage appears across the metal contacts
C.Spin the module frame so magnetic flux cuts the interconnect ribbons
D.Store charge chemically in the encapsulant the way a battery stores ions
Explanation: The photovoltaic effect is a semiconductor process. Photons with enough energy create electron-hole pairs; the junction field separates those carriers and drives current through an external circuit. Heat, magnetism, and chemical storage are different energy-conversion mechanisms and are not how a crystalline-silicon PV cell generates power.
2Standard Test Conditions (STC) used on a crystalline-silicon module nameplate are:
A.1000 W/m² irradiance, 25°C cell temperature, AM1.5 spectrum
B.800 W/m² irradiance, 20°C ambient, 1 m/s wind (NOCT)
C.1100 W/m² irradiance, 0°C cell temperature, AM0 space spectrum
D.1000 W/m² irradiance, 45°C cell temperature, AM1.0 spectrum
Explanation: STC nameplate ratings are 1000 W/m², 25°C cell temperature, and the AM1.5 terrestrial spectrum. NOCT uses 800 W/m² and 20°C ambient and is a different operating reference. Designers still apply temperature and irradiance corrections because roofs rarely sit at STC.
3As crystalline-silicon cell temperature rises above 25°C while irradiance stays constant, the dominant electrical change is:
A.Open-circuit voltage falls and maximum power usually falls
B.Open-circuit voltage rises sharply and fill factor increases
C.Short-circuit current falls by about 0.4 percent per °C
D.Maximum-power voltage is unaffected because MPPT holds Vmp fixed
Explanation: Crystalline-silicon Voc and Vmp have negative temperature coefficients, typically around −0.3 to −0.4 percent/°C. Power therefore declines on a hot Nevada roof even though Isc rises only slightly. String design must still use cold Voc for maximum voltage and hot Vmp for the inverter MPPT window.
4Twelve identical modules are wired as two parallel strings of six modules in series. Compared with one module, the array’s nominal string voltage and combined current are:
A.Voltage about 6 times and current about 2 times
B.Voltage about 12 times and current about 12 times
C.Voltage about 2 times and current about 6 times
D.Voltage unchanged and current about 12 times
Explanation: Series connection adds voltage; parallel connection adds current. Six in series multiply Voc/Vmp by six. Two such strings in parallel multiply Isc/Imp by two. That is the basic string-and-combiner architecture used on C-2G arrays.
5If plane-of-array irradiance drops from 1000 W/m² to 500 W/m² at the same cell temperature, the most accurate statement is:
A.Isc falls by about half and Voc falls only a little
B.Voc falls by about half and Isc stays nearly constant
C.Both Voc and Isc fall by about half
D.Both Voc and Isc stay at nameplate because voltage is fixed by the inverter
Explanation: Short-circuit current is nearly proportional to irradiance, so Isc at 500 W/m² is about half of the STC value. Open-circuit voltage varies only logarithmically with irradiance, so Voc stays close to nameplate at constant temperature. That is why 690.8 uses Isc, not Imp, when current can exceed STC in bright conditions.
6Bypass diodes in a crystalline-silicon module junction box are installed mainly to:
A.Limit reverse-bias heating of shaded cells and preserve most of the string current
B.Block nighttime reverse current from a battery into the array
C.Raise Voc so fewer modules are needed to reach inverter minimum voltage
D.Bond the module frame to the equipment grounding conductor
Explanation: When cells are shaded they can be driven into reverse bias by the rest of the string and overheat (hot spots). Bypass diodes across cell groups forward-bias and steer current around the shaded group. Blocking diodes, not bypass diodes, address reverse battery current. Diodes are not grounding devices and they do not increase Voc.
7An inverter’s maximum-power-point tracker (MPPT) is intended to:
A.Operate the array near the Vmp/Imp point where the product of voltage and current is highest
B.Hold the array at Voc so string voltage always stays at the 690.7 maximum
C.Short the array to Isc so conductor ampacity can be measured continuously
D.Replace the need for temperature-corrected string voltage calculations
Explanation: Array power is V × I. The maximum-power point is the knee of the I–V curve (Vmp, Imp). The inverter varies its input operating voltage to stay near that knee as irradiance and temperature change. Voc and Isc are nameplate extremes used for 690.7 and 690.8, not normal MPPT setpoints.
8NEC 2017 690.13(B) requires each PV system disconnecting means to be permanently marked:
A.PV SYSTEM DISCONNECT or equivalent
B.SERVICE DISCONNECT ONLY
C.INVERTER INPUT — DO NOT OPEN
D.UTILITY METER BYPASS
Explanation: Section 690.13(B) requires the disconnect to plainly indicate open or closed and to be permanently marked “PV SYSTEM DISCONNECT” or equivalent. That mark tells first responders and inspectors which handle isolates the PV system from premises wiring. It is not a service-disconnect or meter-bypass label.
9NEC 2017 690.13(A) requires the PV system disconnecting means to be installed:
A.At a readily accessible location
B.Only on the roof within 1 ft of the array boundary
C.Inside a locked inverter enclosure that requires a special utility key
D.On the load side of every branch-circuit breaker in the dwelling
Explanation: 690.13(A) places the PV system disconnecting means at a readily accessible location so the system can be isolated without climbing or dismantling equipment. Roof-only placement, hidden keyed enclosures, and scattering disconnects onto every branch circuit do not satisfy that rule.
10Under NEC 2017 690.13(D), each PV system disconnecting means shall consist of not more than:
A.Six switches or six sets of circuit breakers, or a combination of not more than six, in a single enclosure or a grouped set of enclosures
B.Two switches mounted in separate buildings
C.Twelve breakers if they are all backfed listed breakers
D.One fused pullout plus any number of inverter-integrated switches
Explanation: 690.13(D) mirrors the six-disconnect concept: not more than six switches or six sets of circuit breakers, or a combination totaling not more than six, mounted in one enclosure or a grouped set. The limit keeps emergency isolation simple. Extra unmarked inverter switches do not expand the count.

About the NV C-2G Photovoltaics Exam

The Nevada C-2G Photovoltaics Contractor Examination is the official Nevada State Contractors Board trade or management examination administered by PSI Services LLC. The official exam has 75 scored questions. Passing is 56 of 75 points in 150 minutes. The examination is open book. Approved center references include National Electrical Code, 2017 (allowed in center). PSI lists USD 95 for one examination portion and USD 140 if taken with CMS; otherwise USD 95 per trade exam (Candidate Information Bulletin updated 3/25/2026). NSCB requires a separate CMS examination for most new applicants, plus a USD 300 application fee and a USD 600 biennial license fee. This English-language MCQ bank is a study aid, not an official PSI form. It does not replace required trade experience, board approval, fingerprints, bonding, or the official examination.

Assessment

Open Book computer-based multiple-choice. National Electrical Code, 2017 (allowed in center)

Time Limit

150 minutes

Passing Score

56 of 75 points

Exam Fee

USD 95 (PSI Services LLC (for the Nevada State Contractors Board))

NV C-2G Photovoltaics Exam Content Outline

7%

Photovoltaic Theory

PV theory (5 items)

20%

Electrical Interconnection

Electrical interconnection (15 items)

7%

Permitting, Inspection, and Utility Interconnections

Permitting and utility interconnection (5 items)

20%

Photovoltaic Components

PV components (15 items)

13%

Photovoltaic Installation

PV installation (10 items)

27%

Estimating, Calculations, and Design

Estimating, calculations, and design (20 items)

7%

Safety

PV safety (5 items)

How to Pass the NV C-2G Photovoltaics Exam

What You Need to Know

  • Passing score: 56 of 75 points
  • Assessment: Open Book computer-based multiple-choice. National Electrical Code, 2017 (allowed in center)
  • Time limit: 150 minutes
  • Exam fee: USD 95

Keys to Passing

  • Work through all 100 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

NV C-2G Photovoltaics Study Tips from Top Performers

1Distribute study time to the official bulletin 270 content outline (updated 3/25/2026)
2Use only the PSI-listed references; temporary tabs such as Post-it notes are prohibited
3Confirm NSCB experience documentation before scheduling with PSI
4This bank is an English-language MCQ study aid, not an official PSI form

Frequently Asked Questions

How many questions are on the Nevada C-2G Photovoltaics Contractor Examination?

The official PSI examination has 75 scored questions. Passing is 56 of 75 points within 150 minutes (Candidate Information Bulletin 270, updated 3/25/2026).

How much does the NV C-2G Photovoltaics exam cost?

PSI lists USD 95 for one examination portion. Two portions cost USD 140 only if the second portion is CMS. NSCB charges a separate USD 300 application fee and USD 600 biennial license fee.

Is the NV C-2G Photovoltaics exam open book?

Yes. PSI lists this examination as open book. National Electrical Code, 2017 (allowed in center)

Do I still need the CMS examination?

CMS is the required Nevada business-and-law examination. Most new applicants must pass CMS and a trade examination for the requested classification. In most cases you will not retake an exam if you have actively served as a qualified employee in the same classification within the last four years.