PT124.S1.Q7 > Question

SECTION 1 · lr

Question 1 Question 2 Question 3 Question 4 Question 5 Question 6 Question 7 Question 8 Question 9 Question 10 Question 11 Question 12 Question 13 Question 14 Question 15 Question 16 Question 17 Question 18 Question 19 Question 20 Question 21 Question 22 Question 23 Question 24 Question 25

SECTION 2 · lr

SECTION 3 · lr

SECTION 4 · rc

PASSAGE 1

Question 1 Question 2 Question 3 Question 4 Question 5 Question 6

PASSAGE 2

Question 7 Question 8 Question 9 Question 10 Question 11 Question 12 Question 13 Question 14

PASSAGE 3

Question 15 Question 16 Question 17 Question 18 Question 19

PASSAGE 4

Question 20 Question 21 Question 22 Question 23 Question 24 Question 25 Question 26 Question 27

The stimulus can be diagrammed as follows:

A superconductor cannot be economically feasible. Two necessary conditions of an economically feasible superconductor are that it superconducts at or above -148 degrees Celsius, and that it superconducts no higher than -160 degrees Celsius. These two necessary conditions contradict each other, so we can never have an economically feasible superconductor.

This must be true. An economically feasible superconductor involves two contradictory necessary conditions: it must operate above -148°C and yet not operate above -160°C (which is a lower temperature than -148°C). This is impossible. So we can never fulfill the sufficient condition.

This could be false. The stimulus does not provide any information about other substances and their capabilities to superconduct.

This could be false. (C) can be diagrammed as “There is a substance that superconducts at temperatures below -140 degrees Celsius→ use of superconductors is economically feasible.” This is not consistent with our diagram.

This must be false. We know that alloys of niobium and germanium superconduct at temperatures no higher than -160 degrees Celsius.

This could be false. We only discuss alloys of niobium and germanium with regards to their potential use as superconductors; we don’t have any information about potential other uses.

PrepTest 124 - Section 1 - Question 7

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