[Answered] A ventilation problem may exist when the carbon dioxide level in a room exceeds ____

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Author Question: A ventilation problem may exist when the carbon dioxide level in a room exceeds _____. a. 500 ppm ... (Read 40 times)

ap345

Hero Member
Posts: 537

on: Jul 24, 2018

A ventilation problem may exist when the carbon dioxide level in a room exceeds _____.

a. 500 ppm
b. 600 ppm
c. 800 ppm
d. 1,000 ppm

Question 2

The most common source of radon is uranium in _____.

a. soil and rocks
b. well water
c. industrial emissions
d. nuclear waste

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Galvarado142

Sr. Member
Posts: 348

Reply #1 on: Jul 24, 2018

Answer to Question 1

d

Answer to Question 2

a

ap345

Hero Member
Posts: 537

Reply #2 on: Jul 24, 2018

Both answers were spot on, thank you once again

Galvarado142

Sr. Member
Posts: 348

Reply #3 on: Jul 24, 2018

Great! Please up vote

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Author Question: A ventilation problem may exist when the carbon dioxide level in a room exceeds _____. a. 500 ppm ... (Read 40 times)

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