Free LSAT Practice Question

Question 1 of 1
ID: LSAT-LR-117
Section: Logical Reasoning
Topic: Assumption
Difficulty level: Hard

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Harbour engineer: The Skerry signal is published as audible at three miles, but that figure comes from trials in which the listeners lay in an open boat with its engine stopped and the sea slight. A boat in passage makes a good deal of noise of her own and carries it with her. So the distance at which such a boat picks the signal up is something less than the published three miles.

Which one of the following is an assumption on which the engineer's argument depends?

AA boat lying stopped and making no noise of her own picks the Skerry signal up at the full three miles, whatever the state of the sea and whatever else the listener aboard her is attending to.

BAt least some of the sound by which the Skerry signal is picked out lies at pitches a boat's own noise under way also occupies.

CA boat in passage is no better placed to hear the Skerry signal, in any respect the listening trials did not reproduce, than a boat lying stopped.

DThe trials that fixed the published figure need not have been run in the same month, or at the same state of the tide, as the passages the engineer has in mind.

EBoats passing the Skerry make no less noise of their own than boats passing the other signals along this coast.

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