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CR2000 quest...

by shipra » Mon Jul 07, 2008 2:11 am
20. Since the invention of digital readout, machine designers have rushed to replace conventional dials and gauges with digital units. Yet the digital gauge has drawbacks in some situations. Since it presents an exact numeric value, it must be decoded and analyzed by a human operator; its meaning cannot be read in an instantaneous scanning. An analog dial or gauge can be marked with red to alert the operator when a value is entering a danger zone; a digital gauge cannot. And it is difficult to tell whether a digital readout is increasing or decreasing over time, while the up or down movement of a pointer on an analog gauge can be quickly and easily observed.
The author of the passage above would probably recommend the use of digital gauge in cases when
I. warning of a sudden rise or fall in value is needed
II. an operator must read and interpret several gauges within a few seconds
III. a precise numeric value is essential
(A) I only
(B) III only
(C) I and III only
(D) II and III only
(E) I, II, and III
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Source: — Critical Reasoning |
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by abhishingwekar » Mon Jul 07, 2008 2:33 am
The Answer is C.....if you look at the first statement "warning of a sudden rise or fall in value is needed" and then if you see the argument it says "it is difficult to tell whether a digital readout is increasing or decreasing over time" the key phrase here is "over time"
So it can be inferred that first statement is correct.
The second statement is in direct contadiction with the statement "its meaning cannot be read in an instantaneous scanning".
the third statement is stated in the stimulus "it presents an exact numeric value".
So the answer is C

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by shipra » Mon Jul 07, 2008 2:42 am
OA - B
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by abhishingwekar » Mon Jul 07, 2008 2:56 am
What is the source of the qustion???
Which book??
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by shipra » Mon Jul 07, 2008 3:19 am
its from CR1000...sry i wrote the subject wrong last time.....Test 3
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by abhishingwekar » Mon Jul 07, 2008 3:39 am
Hi Shipra,
I am not sure about accuracy of 1000 series.....but I will go for C in any case!!!!
What about you???
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by Ian Stewart » Mon Jul 07, 2008 5:20 am
The answer should be III) only (B). Why not I)? I've highlighted the relevant parts of the question:

An analog dial or gauge can be marked with red to alert the operator when a value is entering a danger zone; a digital gauge cannot. And it is difficult to tell whether a digital readout is increasing or decreasing over time, while the up or down movement of a pointer on an analog gauge can be quickly and easily observed.
For online GMAT math tutoring, or to buy my higher-level Quant books and problem sets, contact me at ianstewartgmat at gmail.com

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by peter.p.81 » Wed May 11, 2016 1:02 am
Cannot decide between C and B. Can anyone brake down these two choices for me please
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