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Bunuel
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Since the invention of digital readout, machine designers have rushed 19 Dec 2019, 06:48
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35% (medium)

Question Stats:

70% (01:40) correct 30% (01:46) wrong based on 2108 sessions

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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
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B
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Since the invention of digital readout, machine designers have rushed 20 Dec 2019, 13:33
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Bunuel
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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I said B.
My notes:
Replace conventional dials with digital dials
digital gauge can't notify you about alerts -- it can provide you a numeric estimate
Hard for humans to analyze digital gauges (increase/decrease)

Hence, Option I is out because analyzing the increases or decreases of a digital gauge is difficult for the human operator.
I eliminated Option II as well since the numeric values that a digital gauge provides takes more than a few seconds to understand as mentioned in the paragraph. "Its meaning cannot be read in an instantaneous scanning"

This provides evidence for Option III
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Since the invention of digital readout, machine designers have rushed 01 Jan 2020, 13:55
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Bunuel
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
Show more

Notes:

...it (the digital gauge) presents an exact numeric value... (Let's keep III.)
...(the digital gauge) cannot be read in an instantaneous scanning... (Thus II. is out)
An analog dial or gauge can be marked with red to alert the operator when a value is entering a danger zone;... (Thus I. is out)

Opt B
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Since the invention of digital readout, machine designers have rushed 10 Aug 2024, 21:35
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Bunuel
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
Show more
­Whenever, an option includes a preposition with additional information (a prepositional clause, such as within a few seconds), GMAT will have the answer in the question (in this case while lingering around "within in a few seconds" of option 2 we can check question where it is stated its meaning cannot be read in an instantaneous scanning)
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Since the invention of digital readout, machine designers have rushed 13 Jul 2025, 22:29
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Since digital gauge is not suitable for quick interpretation, it won't be ideal for II
It also doesn't provide any warning, therefore I is also not valid
Therefore, it is only suitable when precise numeric value is needed.
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