Events & Promotions
|
|
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
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Apr 2308:00 PM PDT
-09:00 PM PDT
Video explanations + diagnosis of 10 weakest areas + 150+ short videos + study plan!
Apr 2301:30 AM EDT
-02:30 AM EDT
Struggling with GMAT Verbal as a non-native speaker? Harsh improved his score from 595 to 695 in just 45 days—and scored a 99 %ile in Verbal (V88)! Learn how smart strategy, clarity, and guided prep helped him gain 100 points.
Apr 2512:30 AM EDT
-01:30 AM EDT
At one point, she believed GMAT wasn’t for her. After scoring 595, self-doubt crept in and she questioned her potential. But instead of quitting, she made the right strategic changes. The result? A remarkable comeback to 695. Check out how Saakshi did it.
Apr 2610:00 AM EDT
-11:00 AM EDT
The Target Test Prep course represents a quantum leap forward in GMAT preparation, a radical reinterpretation of the way that students should study. Try before you buy with a 5-day, full-access trial of the course for FREE!
Apr 2711:00 AM EDT
-12:00 PM EDT
Prefer video-based learning? The Target Test Prep OnDemand course is a one-of-a-kind video masterclass featuring 400 hours of lecture-style teaching by Scott Woodbury-Stewart, founder of Target Test Prep and one of the most accomplished GMAT instructors
Apr 2808:00 AM PDT
-11:00 AM PDT
Whether you are just beginning your MBA journey or fine-tuning your path to a 700+ score, GMAT Day is designed to give you a competitive edge.
06 Jun 2024, 13:36
Kudos
Bookmarks
Treating water supplies with chlorine for 30 minutes should be effective (99% inactivation) against the majority of the bacteria listed.: Yes
Water that is sealed away from sources of pathogens for more than 1 month will likely be free of each of these pathogens except viruses.: No
The pathogen that has the lowest health significance has the highest chlorine-resistance rating.: Yes
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
95%
(hard)
Question Stats:
52% (03:10) correct
48%
(03:20)
wrong
based on 2039
sessions
History
Date
Time
Result
Not Attempted Yet
| Pathogen | Type | Helth significance^a | Persistnece in water supplies^b | Resistence to chlorine^c |
|---|---|---|---|---|
| Acanthamoeba spp. | protozoa | high | unknown | low |
| Adenoviruses | virus | moderate | long | moderate |
| Astroviruses | virus | moderate | long | moderate |
| Burkholderia pseudomallei | bacteria | high | unknown | low |
| Campylobacter jejuni, C. coli | bacteria | high | moderate | low |
| Crytosporidium parvum | protozoa | high | long | high |
| Cyclospora cayetanensis | protozoa | high | long | high |
| Dracunculus medinensis | helminth | high | moderate | moderate |
| E. coli-Enterohaemorrhagic | bacteria | high | moderate | low |
| Entamoeba histolytica | protozoa | high | moderate | high |
| Enteroviruses | virus | high | long | moderate |
| Escherichia coli-Pathogenic | bacteria | high | moderate | low |
| Giardia intestinalis | protozoa | high | moderate | high |
| Hepatitis A virus | virus | high | long | moderate |
| Hepatitis E virus | virus | high | long | moderate |
| Legionella spp. | bacteria | high | unknown | low |
| Naegleria fowleri | protozoa | high | unknown | low |
| Non-tuberculous mycobacteria | bacteria | low | unknown | high |
| Noroviruses | virus | high | long | moderate |
| Other salmonellae | bacteria | high | unknown | low |
| Pseudomonas aeruginosa | bacteria | moderate | unknown | moderate |
| Rotavirus | virus | high | long | moderate |
| Salmonella typhi | bacteria | high | moderate | low |
| Sapoviruses | virus | high | long | moderate |
| Schistosoma spp. | helminth | high | short | moderate |
| Shigella spp. | bacteria | high | short | low |
| Toxoplasma gondii | protozoa | high | long | high |
| Vibrio cholerae | bacteria | high | short to long | low |
| Yersinia enterocolitica | bacteria | moderate | long | low |
a. Health significance: Severity of impact, including potential for outbreaks
b. Persistence in water supplies: Short = less than 1 week; Moderate = 1 week to 1 month; Long = greater than 1 month
c. Resistance to chlorine (standard dose): Low = 99% inactivation in less than 1 minute; Moderate = 99% inactivation in 1–30 minutes; High = 99% inactivation in greater than 30 minutes
The table displays information about certain pathogens that could pose a health risk if present in drinking water.
For each of the following statements, if it is supported by the information in the table and its legend, select Yes. Otherwise select No.
ID: 100376
| Yes | No | |
| Treating water supplies with chlorine for 30 minutes should be effective (99% inactivation) against the majority of the bacteria listed. | ||
| Water that is sealed away from sources of pathogens for more than 1 month will likely be free of each of these pathogens except viruses. | ||
| The pathogen that has the lowest health significance has the highest chlorine-resistance rating. |
ShowHide Answer
Official Answer
Treating water supplies with chlorine for 30 minutes should be effective (99% inactivation) against the majority of the bacteria listed.: Yes
Water that is sealed away from sources of pathogens for more than 1 month will likely be free of each of these pathogens except viruses.: No
The pathogen that has the lowest health significance has the highest chlorine-resistance rating.: Yes
Every tricky question should trigger a follow up quiz.
Build that habit with
GMAT Club Forum Quiz →.
20 Jun 2024, 07:33
Kudos
Bookmarks
The two queries that have been asked above and solution.
Q.1. Treating water supplies with chlorine for 30 minutes should be effective (99% inactivation) against the majority of the bacteria listed.
Sort the table by resistance to chlorine.
For30 minutes: This means you have to scan for both low and moderate vs high. The number of low and moderate are higher. So, answer is yes.
Q.2. Water that is sealed away from sources of pathogens for more than 1 month will likely be free of each of these pathogens except viruses.
Sort the table by persistence in water.
All those under long would still be present as they can persist for more than a month. You can check that there are pathogens other than viruses that have long persistence. Hence, no.
Q.3. The pathogen that has the lowest health significance has the highest chlorine-resistance rating.
Sort the table by health significance.
Now the second query. The option talks of health significance but highest chlorine rating.
There is only one under low, so it has to be the lowest. However, for the second part we look at highest rating which is high. So true and yes.
Q.1. Treating water supplies with chlorine for 30 minutes should be effective (99% inactivation) against the majority of the bacteria listed.
Sort the table by resistance to chlorine.
For30 minutes: This means you have to scan for both low and moderate vs high. The number of low and moderate are higher. So, answer is yes.
Q.2. Water that is sealed away from sources of pathogens for more than 1 month will likely be free of each of these pathogens except viruses.
Sort the table by persistence in water.
All those under long would still be present as they can persist for more than a month. You can check that there are pathogens other than viruses that have long persistence. Hence, no.
Q.3. The pathogen that has the lowest health significance has the highest chlorine-resistance rating.
Sort the table by health significance.
Now the second query. The option talks of health significance but highest chlorine rating.
There is only one under low, so it has to be the lowest. However, for the second part we look at highest rating which is high. So true and yes.
12 Feb 2025, 06:37
Kudos
Bookmarks
guddo
Responding to a pm: How to do this quickly?
Treating water supplies with chlorine for 30 minutes should be effective (99% inactivation) against the majority of the bacteria listed.
Sort by "resistance to chlorine". Check the 'high' list. There is only 1 bacteria there. All other bacteria are low or moderate so they will become inactive in 30 mins.
Select Yes
Water that is sealed away from sources of pathogens for more than 1 month will likely be free of each of these pathogens except viruses.
Sort by "Persistence in water supply". Check the "long" list. Virus, bacteria and protozoa are present in that. Hence some protozoa and bacteria will also remain.
Select No
The pathogen that has the lowest health significance has the highest chlorine-resistance rating.
Sort by "health significance". There is only one "low" there - Non-tuberculous mycobacteria. Its resistance to chlorine rating is high, which is the highest resistance to chlorine rating.
Select Yes
