Since the invention of digital readout, machine designers : GMAT Critical Reasoning (CR)
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Since the invention of digital readout, machine designers

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Since the invention of digital readout, machine designers [#permalink]

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New post 16 Feb 2007, 09:41
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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


Edited for OA...

Answer is 'B'

Last edited by rdg on 17 Feb 2007, 11:05, edited 1 time in total.
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New post 16 Feb 2007, 09:47
B..
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Re: CR - Digital Gauge [#permalink]

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New post 16 Feb 2007, 09:47
rdg wrote:
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


I. warning of a sudden rise or fall in value is needed

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.

II. an operator must read and interpret several gauges within a few seconds

its meaning cannot be read in an instantaneous scanning.

III. a precise numeric value is essential

Since it presents an exact numeric value

Based on the above, it is clear that B.III is the correct answer.
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New post 16 Feb 2007, 16:16
yea pretty straightforward B
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New post 16 Feb 2007, 19:12
yep..one more B.
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New post 19 Feb 2007, 22:08
OA is 'B'
  [#permalink] 19 Feb 2007, 22:08
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