Module 3: Small Quiz on litter traps

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On this page you will find from module 3, the second quiz.

About the Module 3: Small Quiz on litter traps

This small quiz has three multiple choice questions, underneath each question you see answers.
Check the correct answers. When you arrived at the last question & answer, you click on the box: Finish
At this moment you will receive a score 3 out of 3 and you will see which answers are correct. Besides seeing which answer is correct you also see the correct answer of the questionnaire maker.

A litter trap with 2 m3 cage is situated in a twisty river, where 1 m3 of plastic waste is taken along monthly.

Results

#1. 1. How do you catch the most litter?

The correct answer is C.

A, B and D are suboptimal constructions, because not all litter along the width of the river will be caught. A and b aim for the outer bend, but often litter is slowly washed up at the inner bend as well.

#2. 2. The litter trap designed for this river appears to be too small. What can be a reason?

Options A is wrong: it will not influence the amount of litter entering, C is wrong because this is a conscious choice made, D could be an option but the effect will not be as large as in B, therefore B will be the correct answer.

#3. 3. What can be a reason not to block the full width of the river with a guiding arm and litter trap?

The correct answer is B.

This is mainly because all other options are eventually possible but these diadvantages can be taken into account while designing.

 

finish