GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 15 Oct 2019, 21:46

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Indoor pollution experts conducted an analysis of the paint used in ma

Author Message
TAGS:

### Hide Tags

Senior Manager
Status: Gathering chakra
Joined: 05 Feb 2018
Posts: 433
Indoor pollution experts conducted an analysis of the paint used in ma  [#permalink]

### Show Tags

20 Mar 2019, 10:46
1
3
00:00

Difficulty:

65% (hard)

Question Stats:

61% (02:14) correct 39% (02:29) wrong based on 168 sessions

### HideShow timer Statistics

Indoor pollution experts conducted an analysis of the paint used in many office buildings which revealed that the paint contains traces of lead. The lead seems to rise to the surface of the paint and escape into the building's air supply. Tests show that because of the chemical drying process, the lead is not discernible on the surface until the paint has been on the walls for at least six months. To meet safety standards, owners should repaint walls at least every six months, or cover the walls with a different material.

Which of the following, if true, would most weaken the conclusion above?

A) The indoor pollution experts had no clear understanding of why it took six months for the lead to become discernible on the paint's surface.
B) The indoor pollution experts neglected to examine the paint for traces of other toxic substances such as cadmium and mercury.
C) The amount of lead found on the surface of the paint after six months remained constant for the next two years.
D) The indoor pollution experts found that even in those offices painted with a different brand of paint, traces of lead were still found in the air workers breathed.
E) The indoor pollution experts' research shows that the amounts of lead that come into contact with the air people breathe, even in the office buildings that used the greatest amount of paint, are too low to affect workers.
GMAT Club Legend
Joined: 18 Aug 2017
Posts: 4999
Location: India
Concentration: Sustainability, Marketing
GPA: 4
WE: Marketing (Energy and Utilities)
Re: Indoor pollution experts conducted an analysis of the paint used in ma  [#permalink]

### Show Tags

26 Mar 2019, 08:11
option E The indoor pollution experts' research shows that the amounts of lead that come into contact with the air people breathe, even in the office buildings that used the greatest amount of paint, are too low to affect workers
provides alternate reasoning to make the conclusion of the argument break....

energetics wrote:
Indoor pollution experts conducted an analysis of the paint used in many office buildings which revealed that the paint contains traces of lead. The lead seems to rise to the surface of the paint and escape into the building's air supply. Tests show that because of the chemical drying process, the lead is not discernible on the surface until the paint has been on the walls for at least six months. To meet safety standards, owners should repaint walls at least every six months, or cover the walls with a different material.

Which of the following, if true, would most weaken the conclusion above?

A) The indoor pollution experts had no clear understanding of why it took six months for the lead to become discernible on the paint's surface.
B) The indoor pollution experts neglected to examine the paint for traces of other toxic substances such as cadmium and mercury.
C) The amount of lead found on the surface of the paint after six months remained constant for the next two years.
D) The indoor pollution experts found that even in those offices painted with a different brand of paint, traces of lead were still found in the air workers breathed.
E) The indoor pollution experts' research shows that the amounts of lead that come into contact with the air people breathe, even in the office buildings that used the greatest amount of paint, are too low to affect workers.
Intern
Joined: 18 Nov 2018
Posts: 26
Indoor pollution experts conducted an analysis of the paint used in ma  [#permalink]

### Show Tags

28 Mar 2019, 05:31
E is the answer. here is the approach.

conclusion : office buildings need to have walls repainted every six months or covered with different materials to meet the safety standard

premise : lead is not discernible on the surface until six months later.

assumption : after six months, the lead that is discernible on the surface will negatively impact on the safety of people breathing the air in the building

negative rephrasing - negate the conclusion and have this 'office building managers might not need to have the walls repainted or covered with different materials because...'

a. doesn't follow the negative rephrasing
b. doesn't follow the negative rephrasing
c. irrelevant
d. support the conclusion
e. CORRECT - support the negative rephrasing
Indoor pollution experts conducted an analysis of the paint used in ma   [#permalink] 28 Mar 2019, 05:31
Display posts from previous: Sort by