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Question 1 of 10
1. Question
Which of the following describes the bulk stage in battery charging?
Correct
The other statements describe the other charging states like absorption (charge is slowing down), float (trickle charge), and equalization (charging voltage is at its highest).
Incorrect
The other statements describe the other charging states like absorption (charge is slowing down), float (trickle charge), and equalization (charging voltage is at its highest).

Question 2 of 10
2. Question
How much energy in 7 hours is 300W/m^2?
Correct
Solution: Convert 300W/m^2 to kW/m^2 (300W/m^2/1000 = 0.3kW/m^2) then multiply ((0.3kW/m^2)(7 hours) = 2.1kWh = 2kWh)
Incorrect
Solution: Convert 300W/m^2 to kW/m^2 (300W/m^2/1000 = 0.3kW/m^2) then multiply ((0.3kW/m^2)(7 hours) = 2.1kWh = 2kWh)

Question 3 of 10
3. Question
How many hours does it take a 4A light to use 68Ah?
Correct
Solution: 68Ah/4A = 17 hours
Incorrect
Solution: 68Ah/4A = 17 hours

Question 4 of 10
4. Question
Convert 2700W to HP.
Correct
Note that 1HP is equal to 746W. Solution: 2700W/746W = 3.6HP
Incorrect
Note that 1HP is equal to 746W. Solution: 2700W/746W = 3.6HP

Question 5 of 10
5. Question
How much energy is used of a 1.5V 75mA light using an AA battery that is left on for 2 hours?
Correct
An AA battery’s voltage is 1.5V. Convert 75mA to A (75mA/1000 = 0.075A) then multiply ((1.5V)(0.075A)(2 hours) = 0.225Wh)
Incorrect
An AA battery’s voltage is 1.5V. Convert 75mA to A (75mA/1000 = 0.075A) then multiply ((1.5V)(0.075A)(2 hours) = 0.225Wh)

Question 6 of 10
6. Question
When is expansion of metal taken into account during the PV build?
Correct
The expansion of metal is considered when designing PV racks to anticipate metal expansion from heat, especially because of its exposure to the sun.
Incorrect
The expansion of metal is considered when designing PV racks to anticipate metal expansion from heat, especially because of its exposure to the sun.

Question 7 of 10
7. Question
What is the resistance in a 100W fan plugged in a 110V socket?
Correct
First, get the current (100W/110V = 0.909A) then apply the resistance formula (110V/0.909A = 121Ω).
Incorrect
First, get the current (100W/110V = 0.909A) then apply the resistance formula (110V/0.909A = 121Ω).

Question 8 of 10
8. Question
When installing PV systems, what is the most common danger to look out for?
Correct
Electrocution is the main danger when installing PV systems because the job deals with highvoltages of electricity.
Incorrect
Electrocution is the main danger when installing PV systems because the job deals with highvoltages of electricity.

Question 9 of 10
9. Question
What is the monthly production of a 5kW PV with 0.82 derating factor placed in a spot which gets 3.8 PSH?
Correct
Solution: Because the derating factor is already given, multiply the given together ((5kW)(0.82)(3.8 PSH)(30 days) = 467kWh). Use the unit kWh when measuring energy output unless stated otherwise.
Incorrect
Solution: Because the derating factor is already given, multiply the given together ((5kW)(0.82)(3.8 PSH)(30 days) = 467kWh). Use the unit kWh when measuring energy output unless stated otherwise.

Question 10 of 10
10. Question
How much energy will a 60W lamp consume in 75 days?
Correct
Solution: (60W)(24 hours/day)(75 days) = 108000Wh => 108000Wh/1000 = 108kWh
Incorrect
Solution: (60W)(24 hours/day)(75 days) = 108000Wh => 108000Wh/1000 = 108kWh