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Kigali training - ACES

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Module 2 - Quiz

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1. What is the objective of energy needs assessment?
Reduce equipment costs Identify and calculate consumption and required power Increase energy consumption Replace old devices
2. A client has an installation consisting of five 10 W lamps operating from 6 PM to 5 AM, a 200 W refrigerator running only from 10 AM to 2 PM, and a 50 W television used occasionally from 6 PM to 11 PM. What is their daily energy consumption?
1.50 kWh 1.55 kWh 1.60 kWh 1.65 kWh
3. Rank the following appliances in ascending order of their daily energy consumption: 1. A 1 kW iron used for one hour per day 2. Two 450 W projectors operating from 6 PM to 5 AM 3. A 1500 W electric stove used daily from 10 AM to 1 PM and from 5 PM to 10 PM 4. 35 lamps of 30 W each, operating from 6 PM to 5 AM
1 < 2 < 4 < 3 1 < 3 < 4 < 2 1 < 2 < 3 < 4 1 < 3 < 2 < 4
4. What is an important criterion for choosing a battery in a solar system?
The color of the battery The desired autonomy The length of the cables The number of solar panels
5. What is the purpose of the GAISMA software?
Remote monitoring of the installation Calculating electricity consumption and comparing it with different solar kit productions Repair and update of the solar system Obtaining meteorological data of the site
6. What is the purpose of the PVSyst software?
Photovoltaic system sizing software Database programming software Remote monitoring software Software for calculating daily, monthly, and annual consumption
7. Determine the required lithium battery capacity to ensure 3 days of autonomy for a 48V system powering 10 lamps of 20W for 8 hours/day and a 2000W coffee machine for 1 hour/day, considering a 90% efficiency and a 90% Depth of Discharge (DoD).
225 Ah 93 Ah 925 Ah 278 Ah
8. What is the particularity of MPPT charge controllers?
Polarity can be reversed without damaging the controller They are easily available on the market at a low cost These controllers accept higher voltages They only work with a 48V battery voltage
9. What is the role of a surge arrester in an installation?
Protects batteries and DC circuits against overcurrents Protects against overloads and short circuits by automatically cutting off the circuit Protects against overvoltages caused by lightning All answers are correct
10. Which of these factors does NOT influence the choice of cable size when designing a solar system?
Cable length Color code Current intensity Acceptable voltage drop