CSLB C-46 Solar Contractor practice questions
207 free questions with answers and explanations.
- 201.A C-46 contractor is designing a commercial rooftop PV system. The client requires a system that can be easily expanded in the future without significant disruption to existing operations. Which design approach best accommodates future expansion?Planning and Estimating
- 202.A solar thermal installer is integrating a new pumped closed-loop system with an existing domestic hot water (DHW) tank. The existing tank is a standard electric water heater. To maximize the efficiency of the solar thermal system and ensure proper heat transfer, what is the optimal plumbing configuration for connecting the solar heat exchanger to the existing tank?Solar Thermal System Installation
- 203.A C-46 contractor is developing an estimate for a large-scale commercial ground-mounted PV system. The project site is characterized by uneven terrain and significant changes in elevation. Which estimating consideration will likely have the most substantial impact on the overall project cost for site preparation?Planning and Estimating
- 204.A solar thermal installer is connecting a new circulation pump to the electrical supply for a 240V, 60Hz system. The pump's nameplate indicates a full load current (FLA) of 1.5 Amperes. Assuming typical residential wiring practices and a continuous load, what is the minimum gauge wire required for this circuit, considering the NEC table for ampacity?Solar Thermal System Installation
- 205.A C-46 contractor is conducting a site analysis for a ground-mounted PV system in a rural area. The property has several mature trees and a small pond. Which of the following is the most critical factor to assess first when determining the optimal location for the array?Planning and Estimating
- 206.A solar contractor is installing a new PV system on a residential property. The inverter has an AC output current of 30 A. According to NEC 690.8(A)(1), what is the minimum required continuous current rating for the PV inverter AC output circuit conductors, assuming no temperature correction or adjustment factors are needed?Electrical and Plumbing Codes
- 207.A solar thermal system installer is troubleshooting a closed-loop glycol system where the circulating pump is running continuously, even when the collector temperature is below the storage tank temperature. The differential controller is set correctly for a 10°F turn-on and 3°F turn-off delta-T. What is the most likely cause?Solar Thermal System Installation