Small experimental vacuum tubes

Answer choices

1. A

   Correct82% picked this

   Vacuum tubes are not now preferable to semiconductors for use in

   Why this is right

   The three statements VT → ~CS together imply this. ~CS → ~OH or ~P VT → OH ჻ VT → ~P

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

   82%
2. B

   Too Strong10% picked this

   Once vacuum tubes and semiconductors have comparable maximum current capacity, vacuum tubes will be used

   This is too strong twice. First, vacuum tubes and semiconductors might not be comparable in respects other than current capacity. Second, that vacuum tubes might be preferred for use in digital circuits is not the same as they will be used in digital circuits.

   10%
3. C

   Too Strong3% picked this

   The only reason that vacuum tubes are not now used in digital circuits is that vacuum tubes' maximum

   This is too strong twice. First, that vacuum tubes’ maximum current capacity is not comparable to semiconductors does not mean that it is too low—it could be too high. Second, this rules out other possible ways in which vacuum tubes and semiconductors are not comparable in significant respects.

   3%
4. D

   Speculation1% picked this

   Semiconductors will always be preferable to vacuum tubes for use in

   The statements do not indicate that the relationship will remain true in the future.

   1%
5. E

   Too Strong3% picked this

   Resistance to heat is the only advantage that vacuum tubes have

   Resistance to heat is an advantage that vacuum tubes have over semiconductors, but to say that it is the only advantage goes too far.

   3%