After replacing his old gas water heater with a new, pilotless, gas

Question

After replacing his old gas water heater with a new, pilotless, gas water heater that is rated as highly efficient, Jimmy’s gas bills increased.

Each of the following, if true, contributes to an explanation of the increase mentioned above EXCEPT:

(A) The new water heater uses a smaller percentage of the gas used by Jimmy’s household than did the old one.

(B) Shortly after the new water heater was installed, Jimmy’s uncle came to live with him, doubling the size of the household.

(C) After having done his laundry at a laundromat, Jimmy bought and started using a gas dryer when he replaced his water heater.

(D) Jimmy’s utility company raised the rates for gas consumption following installation of the new water heater.

(E) Unusually cold weather following installation of the new water heater resulted in heavy gas usage.

Source: LSAT

sobby · Answer

A is answer 
B-Gives a reason for the bill inc
C-gives a reason
D-rate inc ..it also gives a reason
E-more usage of gas -more bill

septwibowo · Answer

I am dreaming most of the CR GMAT questions look like this question.

Thank you  broall  !

broall · Answer

LOL, you could see most of CR questions that like this one in GMAT exam, but I'm afraid that the score would be below 600

sahilsnpt · Answer

This is the nth time I forgot to read The EXCEPT!! Such a dumb fellow I am!

Abhishek009 · Answer

Certainly (A) , it doesn't talk about the potential cause of increase in gas bills..

honneeey · Answer

Hi Expert,

Why not "C"?

A tells that new water heater uses smaller %age of gas used by Jimmy's household than did the old one.

It doesn't confirm a reason why Jimmy's gas bill increased?

GMATNinja · Answer

So we're looking for possible causes of an increase in Jimmy's gas bill. The passage tells us that Jimmy's new water heater is rated as highly efficient. So we would expect the new water heater to be more efficient than the old one. In other words, if both the old heater and the new heater were used to create the same quantity of heat, the new heater should use less gas in doing so.

So, as long as the energy requirements of Jimmy's household remain constant, we would expect the gas bill to  decrease .

However, we know that the gas bill increased. So we're looking for factors that could have caused this increase, such as:

Anything that causes more gas to be used 
  Anything that raises the cost of using gas

Now, let's take a closer look at (C):

This choice introduces a  gas dryer  to the household, which causes more gas to be used. We know the dryer is an entirely new cause of gas usage, because this choice also tells us that Jimmy was previously doing his laundry at the laundromat. That's why (C) contributes to an explanation of the increase, and that's why we eliminate the choice.

I hope that helps!

VerbalBot · Answer

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After replacing his old gas water heater with a new, pilotless, gas

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After replacing his old gas water heater with a new, pilotless, gas

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