PV Installation Practice Exam | Complete Questions & Answers (100% Correct)
PV Installation Practice Exam | Complete Questions & Answers (100% Correct)
The charge controller enters ____ mode when it determines that there is no longer enough array current being produced to charge the batteries -...
PV Installation Practice Exam | Complete
Questions & Answers (100% Correct)
The charge controller enters ____ mode when it determines that there is no longer enough array current being produced to charge the batteries - ANSWER - NIGHT
_____ inverters are not designed to connect to the electrical grid. - ANSWER - STAND ALONE
A _________ protects the batt. from both overcharge and overdischarge conditions - ANSWER - CHARGE CONTROLLER
_____ inverters can operate in both the stand-alone and interactive mode - ANSWER - BIMODAL
A _________ is an electronic device that converts DC to AC power for standard mode. -
ANSWER - INVERTER
provide DC power to batteries when there is no sunlight - ANSWER - PV MODULES
MOST COMPLEX - ANSWER - PULSE WIDTH MODULATED
Production and installation of PV system is growing - ANSWER - True
Solar radiation is highly variable resource and signifcant differences exist among regions in the United States - ANSWER - True
Most inverters can be installed either indoors or outdoors ,as long as they are kept dry and have enough space around them for air flow. - ANSWER - True
The efficiency of a building envelope is how well it isolates the indoor environment from the outdoor environment . - ANSWER - True
One or more potential array locations must be identified during a site survey. - ANSWER - True
Batteries in a PV system are charged by the loads and discharged by the array - ANSWER - False
For most PV devices , a high operating temperature significantly increases voltage - ANSWER - False Self -discharge is the gradual reduction in the state of charge of a battery while at steady -state condition - ANSWER - True
Only flooded open -vent batteries need equalization - ANSWER - True
Lead -acid batteries are the most common type of batteries used in PV systems - ANSWER - True
Batteries are connected in series by connecting all of the positive terminals together and
all the negative terminals together - ANSWER - False
Multistage charge controllers with an absorption charge cycle will also include a float charge set point , which is a slightly lower voltage then the voltage regulation set point - ANSWER - True
Applications with widely varying insulation or extreme temperature variations are generally not suitable for self-regulating systems - ANSWER - True
An inverter is a device that converts DC power to AC power - ANSWER - True
Pulse -width modulation (PWM) is a method of simulating waveforms by switching series device ON and OFF frequency and for variable lengths of time - ANSWER - True
Low operating temperatures and high discharge rates increase battery capacity - ANSWER - False
The number of series -connected modules in each array string is determined by dividing
the rated array current by the selected module's current output - ANSWER - False
Arrays are most often installed on roofs - ANSWER - True
Active cooling means are practical for cooling flat -plate modules - ANSWER - False
The allowable withdrawal load is the force required to remove a screw from from a material by tensile (pulling ) force only - ANSWER - True
Ground foundations for rack mounts typically include concrete footers - ANSWER - True
The most common type of interactive PV system is one that does not use energy storage - ANSWER - True
At a minimum ,a PV permit application must include a detailed three -line electrical diagram - ANSWER - False
Significantly low specific gravity of individual battery cells indicates cell failure or shorts -
ANSWER - True
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