Recent Lessons

Show all results for ""

Feature Overview

Ace your exams with our all-in-one platform for creating and sharing quizzes and tests.

Quizzes

Create quizzes and tests automatically from your content using AI.

Flashcards

Automatically turn your notes into digital flashcards.

Share, Export & Embed

Share with classmates or export to Excel and your learning management system.

Stats & Reporting

Auto-grading quizzes and tests with detailed stats and reports.

Mobile Apps

The smarter way to study – wherever you are.

Pricing

Search...

Materials Recovery Facilities and Unit Operations Quiz

12 Questions

1 Views

Materials Recovery Facilities and Unit Operations Quiz

Choose a study mode

Play Quiz

Study Flashcards

Spaced Repetition

Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the main purpose of size reduction in MSW?

To transport materials to a MRF

To separate materials based on size

To process materials for direct use like mulch or compost (correct)

To increase the size of materials

Which type of equipment is effective for breaking brittle materials?

Disc Screen

Shear Shredder

Hammermill (correct)

Tub Grinder

How do shear shredders operate?

By a scissor-like action with counter-rotating knives (correct)

By using centrifugal forces

By rotating at high speeds

By crushing waste using hammers

Which type of shaft is considered more reliable in hammermills?

Horizontal shaft Signup and view all the answers

What is the main advantage of Tub Grinder in size reduction?

Diesel-powered for ease of moving Signup and view all the answers

How does the size distribution change after hammermilling raw MSW materials?

Distribution changes significantly Signup and view all the answers

What is the main purpose of Materials Recovery Facilities (MRFs)?

To separate commingled waste into usable materials Signup and view all the answers

What happens to the organic portions of waste in a Materials Recovery Facility?

They are transformed into refuse-derived fuel (RDF) Signup and view all the answers

Which unit operation is used in MRFs to separate plastic from paper?

Electric/magnetic separation Signup and view all the answers

Why is it important to modify the physical characteristics of waste in MRFs?

To make components easier to remove Signup and view all the answers

What is the purpose of densification in Materials Recovery Facilities?

To reduce the volume of materials for easier handling Signup and view all the answers

Which component of MSW can be transformed into refuse-derived fuel (RDF) for energy recovery?

Organics Signup and view all the answers