Logical ReasoningDifficulty: Easy

PT134 S2 Q7 Explanation

Inertia affects the flow

A free, expert breakdown of this official LSAT Logical Reasoning question.

TopicsMost Supported

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Stimulus

Inertia affects the flow of water pumped through a closed system of pipes. When the pump is first switched on, the water, which has mass, takes time to reach full speed. When the pump is switched off, inertia causes the decrease in the water flow to be are similar to the effects of inertia in water pipes.

What this question is testing

Most Supported

Your task

Break the argument into its conclusion and evidence, then do exactly what the question stem asks with that structure.

Common trap

Answers that sound relevant to the topic but don't connect to the argument's actual reasoning.

Winning move

Predict what a right answer must do, then test each choice against the conclusion-evidence gap.

Reading along? Open the full official question in LawHub — we show a fragment here and keep the reasoning in our own words.

The question
7.

The information above provides the most support for which one of

Answer choices

  1. Correct80% picked this

    The rate at which electrical current flows is affected

    Why this is right

    The first three statements combine to imply that inertia affects the rate that water flows in a closed circuit of pipes. Since the effects of inductance in electrical circuits is similar to the effects of inertia in water pipes, inductance affects the rate at which electrical currents flow.

    Skill tested: Most Supported · how this choice captures the argument's function is the move to repeat next time.

  2. Unsupported Relationship7% picked this

    The flow of electrical current in a circuit

    This confuses the analogous relationship by bringing inertia into electrical circuits even though inductance plays the role of inertia in electrical circuits.

  3. Too Strong4% picked this

    Inertia in the flow of water pumped by an electrically powered pump is caused by inductance

    This suggests that inertia is caused by inductance. While inertia and inductance both affect the rate at which water and electricity flow respectively, to suggest that inductance causes inertia goes too far.

  4. Out of Scope1% picked this

    Electrical engineers try to minimize the effects of inductance in

    The goals of electrical engineers are not discussed in the statements.

  5. Unsupported Relationship9% picked this

    When a water pump is switched off it continues to pump water for a

    This suggests that when a water pump is switched off the pump continues to pump water for a second or two, while the statements suggest that when a pump is switched off inertia causes the decrease in the water flow to be gradual. That doesn’t mean the pump continues to pump water.

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