Scotts Deck

Question 0

Name 6 nab cep tests

Answer 0

1. PV entry level exam
2. Installer certification
3. PV technical sales certification
4. Solar thermal entry level
5. Solar thermal certification
6. Small wind certification
7. Renewable energy storage systems

Question 1

What does nab cep stand for

Answer 1

North American board of certified energy practitioners

Question 2

in 1839 what did PV pioneer Edmond Bacquerel discover?

Answer 2

1839 Electrode emissions in solution increased emissions when exposed to light

Question 3

In 1954 what did bell labs develop.

Answer 3

The first silicon based solar cell

Question 4

What type of pv system feeds power to the grid but can’t power your house if the grid goes down?

Answer 4

A grid tied utility interactive Pv system

Question 5

What type of system feeds power to the grid but can keep giving you power if the grid goes down.

Answer 5

Grid tied with battery backup

Question 6

What are two differences that differentiate commercial from residential pv

Answer 6

Residential single phase 240v ac under 10k

Commercial 208 277 480 usually over 10 k

Question 7

Advantages of PV over other renewable energy systems

Answer 7

Pv works when energy demand is highest

Wind not reliable people live sunny rather than windy places

Question 8

Would it be more economical to implement energy efficiency improvements or install PV in a house with poor insulation and inefficient appliances and lighting.

Answer 8

Energy efficiency would be a better choice. because it is easier and more cost effective to insulate or use more efficient lights and appliances than it is to make enough solar power to compensate for using inefficient buildings or appliances. It’s cheaper to save than buy.

Question 9

What does OSHA stand for and what is required for NABCEP certification.

Answer 9

Occupational safety and health administration

Question 10

Equation for power

Answer 10

Power in watts = v volts x current I in amps

Question 11

Energy =

Answer 11

Energy equals watt hour

Question 12

Relationship between voltag resistance and current

Answer 12

V= I x R

Vis volts I is current r is resistance in oms

Question 13

What is kilo mega giga and milli mean

Answer 13

Kilo thousand mega million giga billion

Question 14

What is Isc

Answer 14

Isc is short circuit voltage. all current no voltage wires shorted

Question 15

What is Voc

Answer 15

Voc is open circuit voltage, no current wires not touching

It is all voltage no current

Question 16

What is Imp and Vmp

Answer 16

Imp and Vmp are current and voltage at the point of maximum power output

Question 17

What does STC have to do with how do you find the maximum

Rated power of your panel and why isn’t it realistic?

Answer 17

You find panel rating in watts by multiplying current times voltage both at maximum power output or Imp x Vmp

Question 18

What are the STC ‘s

Answer 18

STC stands for standard test conditions and is 1000 watts per sq meter at 25 degrees Celsius and 1.5 atmospheres pressure

Question 19

What is Irradiance?

Answer 19

Irradiance represents an instantaneous measure of power on an area

Question 20

What is MPPT and what does it accomplish

Answer 20

Solar edge uses MPPT or maximum power point tracking in power optimisers to keep the output power V x I always at the point where maximum power can be made by the panel

Question 21

How does Linking panels in a longer series string affect the output current and voltage?

Answer 21

Linking panels in series increases the voltage by the number of panels times the output voltage of each panel

Question 22

On the I V curve graph of a panels measured voltage vs. current. what is significant about the point on the graph whare Vmp and Imp are found

Answer 22

It is the voltage and current at which your panel will make the most power.

Question 23

What is solar insulation

Answer 23

Solar insulation is a measure of solar irradiation usually over a year

Question 24

What is solar irradiation

Answer 24

Irradiation is irradiance times time

Question 25

Is irradiance a measure of power or energy

Answer 25

Irradiance commonly measured in watts per meter squared is a measure of power

Question 26

What is a peak sun hour

Answer 26

A peak sun hour is a measure of the solar irradiation 1000 watts per square meter for one hour at noon

Question 27

How do you measure azimuth and what direction would you be looking if your reading was 180

Answer 27

You use a compass to measure azimuth and a reading of 180 means you are facing south

Question 28

What is magnetic declination, and with a declination of 14 degrees in California what would your compass have to read to face true south

Answer 28

Magnetic declination is the deviation of magnetic north from true north caused by the fact that geographic north does not line up with magnetic north. You would have to turn until your compass read 190 degrees

Question 29

If you were tilting a south facing panel up to get the most sun at noon would you use your latitude or longitude for your tilt angle

Answer 29

You're latitude as this would make the panel perpendicular to the suns rays

Question 30

Why is it not usually worth using single or duel tracking on our solar arrays

Answer 30

The cost of the tracker does not improve the performance of the system enough to justify the cost. You would be better off spending the money on more panels

Question 31

Why would a duel axis tracker give a greater increase in proformance on the moon than on earth

Answer 31

At low angles of sun on the moon the atmosphere would not diminish the amount of solar irradiance hitting the panel

Question 32

What is the function of the solar pathfinder or solmetric suneye

Answer 32

They both help determine the annual amount of solar resource available to you in a specific location

Question 33

Compare and contrast direct beam and diffuse solar radiation.

Answer 33

Direct beam radiation is direct uninterrupted solar radiation, while diffuse radiation is indirect radiation not coming from a single direction and source( clouds, blue sky, haze)

Question 34

What type of solar radiation is albedo.

Answer 34

Reflected radiation

Question 35

What does a pyranometer measure.

Answer 35

Total solar irradiation both diffuse and direct beam

Question 36

Use your understanding of the different types of solar radiation to explain why a 1 megawatt CSS , or concentrating solar collector array would be more likely to use a tracking system than a 1 megawatt PV solar array

Answer 36

A concentrating solar collector needs direct beam radiation to function and therefore it's collecting mirrors must always have a way to remain pointed at the sun, a PV panel system can gather both diffuse and direct beam radiation without being precisely oriented toward the sun and thus hav less need of tracking