In 1986, the city of Los Diablos had 20 days on which air : GMAT Critical Reasoning (CR)
Check GMAT Club Decision Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack

 It is currently 21 Jan 2017, 05:28

### 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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# In 1986, the city of Los Diablos had 20 days on which air

Author Message
TAGS:

### Hide Tags

Senior Manager
Joined: 12 Oct 2003
Posts: 261
Location: sydney
Followers: 1

Kudos [?]: 20 [0], given: 0

In 1986, the city of Los Diablos had 20 days on which air [#permalink]

### Show Tags

26 Apr 2005, 07:31
00:00

Difficulty:

(N/A)

Question Stats:

100% (00:00) correct 0% (00:00) wrong based on 2 sessions

### HideShow timer Statistics

In 1986, the city of Los Diablos had 20 days on which air pollution reached unhealthful amounts and a smog alert was put into effect. In early 1987, new air pollution control measures were enacted, but the city had smog alerts on 31 days that year and on 39 days the following year. In 1989, however, the number of smog alerts in Los Diablos dropped to sixteen. The main air pollutants in Los Diablos are ozone and carbon monoxide, and since 1986 the levels of both have been monitored by gas spectrography.
Which of the following statements, assuming that each is true, would be LEAST helpful in explaining the air pollution levels in Los Diablos between 1986 and 1989?
(A) The 1987 air pollution control measures enacted in Los Diablos were put into effect in November of 1988.
(B) In December of 1988 a new and far more accurate gas spectrometer was invented.
(C) In February of 1989, the Pollution Control Board of Los Diablos revised the scale used to determine the amount of air pollution considered unhealthful.
(D) In 1988 the mayor of Los Diablos was found to have accepted large campaign donations from local industries and to have exempted those same industries from air pollution control measures.
(E) Excess ozone and carbon monoxide require a minimum of two years to break down naturally in the atmosphere above a given area.
_________________

When u r about to make ends meet, someone moves the ends.

If you have any questions
New!
VP
Joined: 30 Sep 2004
Posts: 1488
Location: Germany
Followers: 6

Kudos [?]: 327 [0], given: 0

### Show Tags

26 Apr 2005, 08:54
B) In December of 1988 a new and far more accurate gas spectrometer was invented. => this is not important, because we dont know whether this spectroblablabla was used. we only know that is was invented.
_________________

If your mind can conceive it and your heart can believe it, have faith that you can achieve it.

Senior Manager
Joined: 12 Oct 2003
Posts: 261
Location: sydney
Followers: 1

Kudos [?]: 20 [0], given: 0

### Show Tags

26 Apr 2005, 09:25
what D has to do than? how exemption of industry is related to measure of pollution?
_________________

When u r about to make ends meet, someone moves the ends.

Manager
Joined: 03 Nov 2004
Posts: 190
Followers: 1

Kudos [?]: 14 [0], given: 0

### Show Tags

26 Apr 2005, 09:46
for D
in 1988 the industry were exempted--- therefore the high levels of the smog alert (39 in number).

note that pollution measures were initiated in 1987, which restricts the amount of pollutants an industry can emit. so if the industries are exempted from the restriction then they will not employ the various expensive pollution control methods,which they would have to employ if the restrictions persisted.

D helps us to understand why the smog alert were higher in number for the year 1988 and therefore can not be the answere.
SVP
Joined: 30 Oct 2003
Posts: 1793
Location: NewJersey USA
Followers: 5

Kudos [?]: 98 [0], given: 0

### Show Tags

26 Apr 2005, 11:49
I think (D) is the least helpful in understanding the pollution pattern.

As per (D) the pollution level should increase after 1988. But it did not.
Director
Joined: 05 Jan 2005
Posts: 560
Followers: 2

Kudos [?]: 22 [0], given: 0

### Show Tags

26 Apr 2005, 23:22
(B) is close because the new spectrometer may have corrected faults of the old one and thereby increase (or even decrease) the no. of smog alerts. WE are not sure about it's effect on smog alerts.

(D) is my answer because it completely fails to explain the trend given in the stimulus. If many industries were exempted then it makes sense to believe that the no. of smog alerts will drop, perhaps rapidly.

(D) for me.
VP
Joined: 26 Apr 2004
Posts: 1218
Location: Taiwan
Followers: 2

Kudos [?]: 607 [0], given: 0

### Show Tags

27 Apr 2005, 06:05
anandnk wrote:
I think (D) is the least helpful in understanding the pollution pattern.

As per (D) the pollution level should increase after 1988. But it did not.

Hi,

choice D does explain why in 1988 the alert increased. Maybe in 1989 those industries exemped were not allowed to emit; thus choice D does explain the decrease of alerts in 1989.
VP
Joined: 26 Apr 2004
Posts: 1218
Location: Taiwan
Followers: 2

Kudos [?]: 607 [0], given: 0

### Show Tags

27 Apr 2005, 06:20
Hi, I don't know whether the measure enacted was to prevent the air pollution or to display alerts.

if the measure enacted was to prevent the air pollution, then the alert would decrease after the measure was enacted. Then choice A is the OA. Because the measure was enforced in 1987; however, the alert in 1988 increased.

what's wrong with A?

(B) In December of 1988 a new and far more accurate gas spectrometer was invented.
id does explain the increase in 1988

(C) In February of 1989, the Pollution Control Board of Los Diablos revised the scale used to determine the amount of air pollution considered unhealthful.

it may explain the decrease in 1989, because the scale became loose.
(D) In 1988 the mayor of Los Diablos was found to have accepted large campaign donations from local industries and to have exempted those same industries from air pollution control measures.
it does explain the increase in 1989.

(E) Excess ozone and carbon monoxide require a minimum of two years to break down naturally in the atmosphere above a given area.

it does explain the increase from 1987 to 1989 after the measure was enacted.
Manager
Joined: 03 Nov 2004
Posts: 190
Followers: 1

Kudos [?]: 14 [0], given: 0

### Show Tags

27 Apr 2005, 07:33
anandnk wrote:
I think (D) is the least helpful in understanding the pollution pattern.

As per (D) the pollution level should increase after 1988. But it did not.

but the exemptions were only for 1988, after 1988 the restrictions were imposed again.
VP
Joined: 30 Sep 2004
Posts: 1488
Location: Germany
Followers: 6

Kudos [?]: 327 [0], given: 0

### Show Tags

27 Apr 2005, 07:56
chunjuwu wrote:

(B) In December of 1988 a new and far more accurate gas spectrometer was invented.

but the spectrometer was ONLY invented. we dont know if it was used. in cannot be A) cause if the measures were put into effect in nov 88, it is a reason why the pollution level increased so late, because before there were no restrictions.
_________________

If your mind can conceive it and your heart can believe it, have faith that you can achieve it.

VP
Joined: 18 Nov 2004
Posts: 1440
Followers: 2

Kudos [?]: 37 [0], given: 0

### Show Tags

27 Apr 2005, 08:06
gotta be "B"....invention of XYZ doesn't mean anything, there is no indication that the new spectrometer was used in measurements.
Director
Joined: 04 Jul 2004
Posts: 904
Followers: 4

Kudos [?]: 51 [0], given: 0

### Show Tags

27 Apr 2005, 17:31
banerjeea_98 wrote:
gotta be "B"....invention of XYZ doesn't mean anything, there is no indication that the new spectrometer was used in measurements.

S&^%, I dont when I am going to learn from my mistakes.
Senior Manager
Joined: 12 Oct 2003
Posts: 261
Location: sydney
Followers: 1

Kudos [?]: 20 [0], given: 0

### Show Tags

28 Apr 2005, 18:35
OA is D.
_________________

When u r about to make ends meet, someone moves the ends.

VP
Joined: 18 Nov 2004
Posts: 1440
Followers: 2

Kudos [?]: 37 [0], given: 0

### Show Tags

28 Apr 2005, 19:55
what's the source of this CR and does that have any OE ? Thx
28 Apr 2005, 19:55
Similar topics Replies Last post
Similar
Topics:
In 1986, the city of Los Diablos had 20 days on which air 2 22 Apr 2008, 19:11
In 1986, the city of Los Diablos had 20 days on which air 13 17 Jan 2008, 16:49
1986, the city of Los Diablos had 20 days on which air 9 10 Dec 2007, 16:07
In 1986, the city of Los Diablos had 20 days on which air 7 26 Jul 2007, 22:13
In 1986, the city of Los Diablos had 20 days on which air 17 07 Jun 2007, 21:23
Display posts from previous: Sort by