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 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.
A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
90% (01:53) correct
10%
(02:18)
wrong
based on 4038
sessions
History
Date
Time
Result
Not Attempted Yet
Highway Official: When resurfacing our concrete bridges, we should use electrically conductive concrete (ECC) rather than standard concrete. In the winter, ECC can be heated by passing an electric current through it, thereby preventing ice buildup. The cost of the electricity needed is substantially lower than the cost of the de-icing salt we currently use.
Taxpayer: But construction costs for ECC are much higher than for standard concrete, so your proposal is probably not justifiable on economic grounds.
Which of the following, if true, could best be used to support the highway official’s proposal in the face of taxpayer’s objection?
(A) The use of de-icing salt causes corrosion of the reinforcing steel in concrete bridge decks and damage to the concrete itself, thereby considerably shortening the useful life of concrete bridges.
(B) Severe icing conditions can cause power outages and slow down the work of emergency crews trying to get power restored.
(C) In weather conditions conducive to icing, ice generally forms on the concrete surfaces of bridges well before it forms on parts of the roadway that go over solid ground.
(D) Aside from its potential use for de-icing bridges, ECC might also be an effective means of keeping other concrete structures such as parking garages and airport runways ice free.
(E) If ECC were to be used for a bridge surface, the electric current would be turned on only at times at which ice was likely to form.
CR08330.02
Taxpayer: But construction costs for ECC are much higher than for standard concrete, so your proposal is probably not justifiable on economic grounds.
Which of the following, if true, could best be used to support the highway official’s proposal in the face of taxpayer’s objection?
(A) The use of de-icing salt causes corrosion of the reinforcing steel in concrete bridge decks and damage to the concrete itself, thereby considerably shortening the useful life of concrete bridges.
(B) Severe icing conditions can cause power outages and slow down the work of emergency crews trying to get power restored.
(C) In weather conditions conducive to icing, ice generally forms on the concrete surfaces of bridges well before it forms on parts of the roadway that go over solid ground.
(D) Aside from its potential use for de-icing bridges, ECC might also be an effective means of keeping other concrete structures such as parking garages and airport runways ice free.
(E) If ECC were to be used for a bridge surface, the electric current would be turned on only at times at which ice was likely to form.
CR08330.02
Every tricky question should trigger a follow up quiz.
Build that habit with
GMAT Club Forum Quiz →.
23 May 2020, 18:53
Kudos
Bookmarks
vasuca10
Sure thing, vasuca10!
Highway Official: When resurfacing our concrete bridges, we should use electrically conductive concrete (ECC) rather than standard concrete. In the winter, ECC can be heated by passing an electric current through it, thereby preventing ice buildup. The cost of the electricity needed is substantially lower than the cost of the de-icing salt we currently use.
Taxpayer: But construction costs for ECC are much higher than for standard concrete, so your proposal is probably not justifiable on economic grounds.
Which of the following, if true, could best be used to support the highway official’s proposal in the face of taxpayer’s objection?
So, we're looking to address why the choice to use ECC rather than standard concrete would be justifiable on economic grounds, despite the fact that construction costs are higher than for standard concrete.
(A) The use of de-icing salt causes corrosion of the reinforcing steel in concrete bridge decks and damage to the concrete itself, thereby considerably shortening the useful life of concrete bridges. <- If de-icing salt lessens the useful life of concrete structures, this provides an excellent reason why ECC might make more economic sense, despite the higher construction costs. If ECC lasts longer and costs less to maintain temperature control - it could make economic sense despite the higher construction costs! We have our answer!
(B) Severe icing conditions can cause power outages and slow down the work of emergency crews trying to get power restored. <- Pretty irrelevant to us here, as both perspectives in our argument are addressing options for building/maintaining safe roadways, not whether or not we need de-icing options at all!
(C) In weather conditions conducive to icing, ice generally forms on the concrete surfaces of bridges well before it forms on parts of the roadway that go over solid ground. <- Again, this doesn't address the potential net difference in cost between regular concrete + de-icing vs. ECC.
(D) Aside from its potential use for de-icing bridges, ECC might also be an effective means of keeping other concrete structures such as parking garages and airport runways ice free. <- Effectiveness isn't what we're addressing in this argument. The taxpayer is claiming that construction costs (regardless of whether this concrete structure is built for planes, trains, or automobiles!) make ECC a less economically viable option. We need something that tells us ECC is in fact economically viable/wise, despite these construction costs, and (D) fails to address this.
(E) If ECC were to be used for a bridge surface, the electric current would be turned on only at times at which ice was likely to form. <- We only use the current when needed, we only de-ice when needed... again, this doesn't bring a new piece of evidence into the mix that addresses why ECC is economically viable despite its higher construction costs.
So, we want to be sure we're addressing the argument and conclusion presented to us. (That seems to be where you got caught up here.) Here, we aren't just trying to address why ECC is "good" or "effective," we want something that specifically counters the taxpayer's argument and addresses why it is economically justified as compared to the use of traditional concrete. Only (A) accomplishes this goal.
03 Apr 2013, 04:09
Kudos
Bookmarks
We are looking for an answer that supports the fact that ECC in the long-period will be cheaper than normal concrete
A. The use of de-icing salt causes corrosion of the reinforcing steel in concrete bridge decks and damage to the concrete itself, thereby considerably shortening the useful life of concrete bridges.
CORRECT: corrosion = short life = more money spent on repairs and maintenance
B. Severe icing conditions can cause power outages and slow down the work of emergency crews trying to get power restored.
This is not related to costs.
C. In weather conditions conducive to icing, ice generally forms on the concrete surfaces of bridges well before it forms on parts of the roadway that go over solid ground.
Again , out of scope because doen't adess the point.
D. Aside from its potential use for de-icing bridges, ECC might also be an effective means of keeping other concrete structures such as parking garages and airport runways ice free.
Out of scope
E. If ECC were to be used for a bridge surface, the electric current would be turned on only at times at which ice was likely to form.
This doesn't show that ECC will save more money than normal concrete.It only says that the electric current would be turned on only at times at which ice was likely to form, so that ECC will be used "wisely"...
A. The use of de-icing salt causes corrosion of the reinforcing steel in concrete bridge decks and damage to the concrete itself, thereby considerably shortening the useful life of concrete bridges.
CORRECT: corrosion = short life = more money spent on repairs and maintenance
B. Severe icing conditions can cause power outages and slow down the work of emergency crews trying to get power restored.
This is not related to costs.
C. In weather conditions conducive to icing, ice generally forms on the concrete surfaces of bridges well before it forms on parts of the roadway that go over solid ground.
Again , out of scope because doen't adess the point.
D. Aside from its potential use for de-icing bridges, ECC might also be an effective means of keeping other concrete structures such as parking garages and airport runways ice free.
Out of scope
E. If ECC were to be used for a bridge surface, the electric current would be turned on only at times at which ice was likely to form.
This doesn't show that ECC will save more money than normal concrete.It only says that the electric current would be turned on only at times at which ice was likely to form, so that ECC will be used "wisely"...
