The corona-outbreak has affected us in many ways; from 0-hour workweeks and stressful online exams to lectures at home, adapting hasn’t been an easy task. Staying disciplined to keep off social media and aimlessly wondering through video’s you’ve already seen becomes harder with each and every day. If only there was a way to fire up the gears of our brains to start off the day…

In the Team Energy Quarantine Quiz, we’re going to help you do exactly that! Each day for one week, at nine o’clock sharp, we’ll add another question to the list. Revolving around the subject closest to our hearths, we challenge you to crack the codes and solve the riddles. If you’re the one most fit for the task, who knows? There might even be a little surprise waiting for you at the end of the line!


No competition can be without rules, here are the ones for ours:

  • Use the same name and email-address for each answer you submit.
  • Your first submission counts, so make it, uh, count!
  • If a question is unclear, you can share your remark in the post concerning the related question on one of our social media platforms (links below).


Earning points is based on the correctness of your answer and how quick you’ve given it, you can earn:

  • 10 Points for each question
  • 2 Bonus points when the answer was submitted on the same day the question was posted (before 24:00)
  • 10 Bonus points if you managed to answer atleast 6 questions correctly

You can in some cases earn points with a partly correct answer.


With the final question, you will have a chance to select your preferred price in case you would win. You can choose between:

  • A Collection of (8) beers from the Eindhoven region (to support our local brewers)
  • A 25-euro giftcard to spend on neat and sustainable goodies at


You can submit your answers untill a week after the last question was posted (so 17 May, 24:00), but don’t forget, the earlyer you are the more points you can earn!


These are the scores for the Team Energy quarantine quiz, thanks for playing!

  1. 82 Tjacco
  2. 76 Wiet
  3. 73 Marie
  4. 73 Tinus Energy
  5. 60 Emma
  6. 35 Djessie
  7. 24 Jarne
  8. 15 Jillz
  9. 13 John
  10. 13 C-characteristic
  11. 13 Zarzkea
  12. 11 EJ
  13. 11 Kaaspeer

QUESTION SEVEN: Wind Tubine Park Eindhoven

In order to introduce the inhabitants of Eindhoven to the subject of sustainability, the municipality has decided to build a ‘wind turbine park’ near the city centre. The park will have a shape of an eight-pointed star, on each point and each intersection (see illustration) a small wind turbine of different shape and size will be placed.

The cables have already be laid such that the maximum load of each horizontal, vertical and diagonal line equals 34 kW. The municipality has already bought 16 turbines ranging from 1 to 16 kW (each turbine has a unique power output, so there will be one turbine for each power output in the range of 1 to 16), can you place these turbines so that all turbines are used and no cable is over-loaded?

The numbers in the illustration correspond to the answer form, found via the following button:

Naturally, there are multiple orientations that yield the same result.

QUESTION SIX: The Perfect Angle

On a planet, far, far away, NASA is planning to build a space station on the ground. The space station will be solar powered, but getting solar panels to this planet is a costly operation. As a mechanical system following the direction of the incident light is out of the question, NASA is looking for the ‘perfect angle’ under which the panels should be placed.

To find this angle, a series of measurements were taken and documented in the CSV and Excel-files below:

CSV-file of the measurements

Excel-file of the measurements

In both these files, the first column contains the measurement number and the second column the verticle angle of the incomming light (beta, see illustration).

Furthermore, we know that the efficiency (percentage) of the solar panel can be calculated with the following formula:

Where gamma is the angle by which the light deviates from falling directly onto the panel. I.e., if the angle between the panel and the incident light is 90 degrees, gamma would equal 0, and the maximum panel efficiency of 23.26 percent would be reached.

Your task is to find the optimal solar panel angle (alpha, see illustration). You can assume that the intensity of the incoming light is equally strong for each angle and that the time between each measurement is exactly the same. The problem can be considered as two-dimensional, the horizontal angle need not be accounted for.

For this question you can also earn points for an answer close to the correct one

Think you’ve got it? Great! Submit your answer with one decimal place using the following form:

QUESTION FIVE: Dividing the Land

Near a small Dutch village, a farmer who, on his land, had four windmills (stars in the illustration) and four storage facilities (batteries in the illustration) had passed away. The land and its contents were to be divided over his four children. Naturally, the windmills nor the storage units can be moved. Can you divide the land (as shown in the illustration) evenly (see the ‘requirements’-section)?

To solve the puzzle, click the diagram (or if this doesn’t work, you can follow this link) and then the  button that will pop up when you hover over it. Either draw lines or colour the squares, it’s all fine as long as it is clear how the land should be divided. To submit your answer, either attach the edited diagram or a screenshot or picture of your answer.


  • The land must be divided in 4 equal parts of a similar shape (and thus of similar size)
  • You can only ‘cut’ amongst the lines
  • Each part must contain one windmill (star in the illustration) and one storage facility (battery in the illustration)

Does your solution match the requirements above? Submit your answer here:

QUESTION FOUR: The Barrel of Wine

Usually Thursday is the day that beer and wine flow like water, but with the reigning pandemic, this tradition has turned plainly impossible. Just before the situation escalated as such, Liza and her house were planning to throw a party at their place. Together, they bought an odd volume of beer and one barrel of wine – indicated in the illustration. Now, since they followed the RIVM guidelines, they cancelled their party and were now left with an awful lot of liquor in their shed. Reaching out to other student houses preparing themselves for the possible lockdown that was to come, they sold a quantity of beer to one house and double the quantity to another but kept the barrel of wine.

Now that you know all this, can you tell what (the volume of) the barrel containing the wine is?

The contents of the barrels were not manipulated when sold, i.e. the barrels were sold as they were bought
You can only earn full points (10) with a correct answer


Alright, alright, yesterday’s ‘find-the-word-or-sentence’ was quite the struggle. So, for today, we’ve prepared one simple calculation.

You see, our friend Harry has recently graduated and bought himself a house!… Wait, that isn’t very realistic, let me start over.

You see, our friend Harry has just retired and bought himself a house! After insulating the walls and replacing the windows, Harry thinks it’s about time he covers his top roof with solar panels. Harry knows some of the dimensions of the rooms (as shown in the floor plan) but doesn’t know the entire surface he can cover. Given that the roof is flat, can you help him find the exact area that can be used?

You can only earn full points (10) with a correct answer
Remember, we want to find the total area, not just the area of the top plane!
The image is not scaled, so measuring will not help you here

QUESTION TWO: Guess the Word or Phrase

Better with letters than with shapes? You’re in luck! Because day two of the quarantine quiz revolves all around finding the right words to describe the scene. To help you get in the zone, we’ve included some examples!

Can you guess which phrase or word is being depicted in the square? Guess the answers and find the three hidden words!

  • Answers don’t have to be related to renewable energy, but the final words do!
  • Include only letters, so no spaces and commas
  • You will have to include all the answers in the answer form, but this spreadsheet or printable pdf might be of help

For this question you can also earn points for a partly correct/complete answer

QUESTION ONE: Oddly-shaped Solar Panels on a Roof

Chris and Diana bought themselves a set of oddly-shaped and oddly-coloured solar panels to cover their south-facing roof. However, after securing one of the panels a strong gust of wind carried their user manual far, far away. Now Chris and Diana are in despair as they have no idea how to fit all these panels together! Can you help the young couple solar-power their house? All panels are already oriented correctly, so you shouldn’t need to turn them around!

How to answer

This question can best be answered on a pc! To solve the puzzle, click the diagram (or if this doesn’t work, you can follow this link) and than the  button that will pop up when you hover over the diagram. You can save the diagram as a file or image but taking a screenshot or picture is also fine. Submit you answer through the button below:

The block readily placed is already in the right spot, do not move it!
You can only earn full points (10) or neither for this question