CRP Collection Systems & Logistics

Question 1

What is the primary advantage of a single-stream recycling collection system compared to a dual-stream system?

Accepted Answer

Increased resident participation due to collection convenience

Answer

Single-stream collection increases participation by making it easier for residents — all recyclables go in one bin — though it typically results in more contamination than dual-stream.

Question 2

Which collection frequency factor most directly affects the cost per ton of curbside recycling collection?

Accepted Answer

Route density (number of stops per route mile)

Answer

Route density — how many households are served per route mile — directly drives collection efficiency; more stops per mile lowers the cost per ton collected.

Question 3

A drop-off recycling center accepts materials 24/7 without staff. What is the most common operational problem associated with unstaffed drop-off sites?

Accepted Answer

High contamination and illegal dumping of non-recyclable waste

Answer

Unstaffed drop-off sites frequently accumulate contamination and illegal dumping because there is no on-site enforcement to prevent improper disposal.

Question 4

What is 'set-out rate' as used in curbside recycling program evaluation?

Accepted Answer

The percentage of eligible households that place their recycling bin at the curb on a given collection day

Answer

Set-out rate measures what proportion of eligible households actually put out their bin for collection, serving as a behavioral indicator of program participation.

Question 5

Which type of collection vehicle is specifically designed to collect source-separated recyclables in multiple compartments without mixing materials?

Accepted Answer

Split-body or compartmentalized collection truck

Answer

Split-body trucks have multiple separate compartments allowing collection of different material streams (e.g., fiber vs. containers) in one pass without mixing.

CRP - Certified Recycling Professional Practice Test

CRP - Certified Recycling Professional Practice Test

CRP Collection Systems & Logistics