Sample Test Solarsix

Sample Test for Review Solar Cycle 6 November 23, 2009 -----------------------1> What is the equinox? 2>What are the factors of resistance? 3> See graphic #1 and draw True North. 4> What is the difference between irradiance & insolation? 5> What is the relationship between Peak Sun Hours & insolation? Use words, math, graphic or arithmetic.

6> What is the relationship of magnetic South to due South for the Bay Area? 7> What is the optimum rule (of thumb) for tilt for maximum annual solar radiation? 8> What is the optimum tilt during the Summer for Peak Demand? 9> What is the optimum orientation for Peak Demand? 10> How is climate & geography related to Peak Sun Hours? 11> Why is RMS important on a DMM?

12> What are the primary functions of a clamp-on meter? 13> What is the primary reason for making module test leads? 14> What type of circuit is used to measure Voltage? 15> What is the best way to measure amperage of a single module and what is the abbreviation of the units? 16> What is the common method of measuring amperage in the field of a single module and units? 17> Vmp(Imp) = ? 18> How is Voc measured? 19> How is Isc measured for a single module? 20> How is Imp measured? 21> What instrument is used to measure current at the combiner box? 22> What is the relationship between voltage and temperature?

23> What is the relationship between irradiance and current?

24> What is Peak Sun Hours? 25> What is the average daily insolation in the Bay Area computed for a fixed array on an annual basis (PSH)?

------New Questions for Test 3------------------26> Define ampacity. 27> What is THWN-2 & its main characteristics? 28> Why use stranded wire over solid? 29> What is AWG? 30> How does AWG relate to ampacity? 31> Which conductor insulation code is best for roof-top PV installations? 32> Which conductor material is preferred for DC? 33> Which conductor material is preferred for solar farms AC? 34> What is the abbreviation for multicontact connectors? 35> What is the wire color for L1? 36> What is the wire color typically for roof-top DC? 37> With THWN-2 in the DC combiner box, how is the negative wire marked? 38> What is the color for the equipment ground? 39> When is EMT conduit required?

40> What is fill factor? 41> How many conductors are allowed in 1” schedule 80 with THWN-2? (see attachment #2)

42> What type of EMT hardware is used for routing wire around corners? 43> What is the difference between free air & conduit for ampacity? 44>What is the ampacity formula for roof-top conductors? 45>What is the maximum recommended overall DC voltage drop? 46> What is the maximum recommended DC home run (length)? 47> What is the primary differences between STC & PTC parameters? 48> Draw the IV curve for BP SX170B modules at STC. (data sheet included)

49> Design an array with 3 strings and 30 BP SX170B modules. a>285Volts~600Volts and 3.5 KW (3~4KW range) b> draw the design with electrical connections c> What is the voltage of the array? d> What is the current? e> What is the power? f> What is the ampacity of the strings? g> What is the ampacity after the combiner box?