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 Your Progress
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
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:
Do RC/MSR passages scare you? e-GMAT is conducting a masterclass to help you learn – Learn effective reading strategies, Tackle difficult RC & MSR with confidence, and Excel in timed test environment
Join us in a comprehensive talk about the F1 Student Visa process with Travis Feuerbacher, former U.S. Visa Officer and licensed U.S. immigration attorney having expertise working for the U.S. Department of State
Ready to skyrocket your career with an MBA? Get ahead with our curated list of FREE courses and resources to kickstart your journey into business education!
Are you attending an MBA or Masters program outside in the US or Europe and wondering how to finance your studies? In this exclusive conversation, we discuss the collateral-free non-cosigner education loans...
Solve 30 high quality GMAT Focus practice questions in timed conditions. Take this GMAT practise test live with peers, analyze your GMAT study progress, and see where you stand in the GMAT student pool.
After just 3 months of studying with the TTP GMAT Focus course, Conner scored an incredible 755 (Q89/V90/DI83) on the GMAT Focus. In this live interview, he shares how he achieved his outstanding 755 (100%) GMAT Focus score on test day.
What do András from Hungary, Pablo from Mexico, Conner from the United States, Giorgio from Italy, Leo from Germany, and Rishab from India have in common? They all earned top scores on the GMAT Focus Edition using the Target Test Prep course!
Join us for an exclusive one-day event focused on mastering the GMAT and maximizing your preparation resources! Here's what you can expect: Don't miss out on this invaluable opportunity to supercharge your GMAT preparation journey.
1986, the city of Los Diablos had 20 days on which air
[#permalink]
10 Dec 2007, 17:07
Show timer
00:00
A
B
C
D
E
Difficulty:
(N/A)
Question Stats:
0%
(00:00)
correct
0%
(00:00)
wrong
based on 0
sessions
HideShow
timer Statistics
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.
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Still interested in this question? Check out the "Best Topics" block below for a better discussion on this exact question, as well as several more related questions.
Re: 1986, the city of Los Diablos had 20 days on which air
[#permalink]
10 Dec 2007, 17:15
cstefanita wrote:
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.
Re: 1986, the city of Los Diablos had 20 days on which air
[#permalink]
09 Jan 2008, 13:04
cstefanita wrote:
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.
I vote for B. 1986: air pollution in 20 days. 1987: new air pollution control measures were enacted. Air polluion in 31 days. 1988: air pollution in 39 days. 1989: drop to 16 days. Air pollutant: ozone and carbon monoxide, and since 1986 the levels of both have been monitored by gas spectrography.
The question asked us about the LEAST explanation. We can see my summary, from 1986 to 1988, the air pollution increases. However, in 1989, it drops. However, in B, it is said that "In December of 1988 a new and far more accurate gas spectrometer was invented." This sentence cannot explain why air pollution in Las... drops in 1989. Because, in 1987, the law was enacted, but is does not help. Air pollution in 1987 and 1988 increases. In the end of 1988, new gas was invented, but in 1989, air pollution dropped. This is the best answer.
A helps to explain the argument. C and E are irrelevant. D is too general.
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
gmatclubot
Re: 1986, the city of Los Diablos had 20 days on which air [#permalink]