Power Systems
The VSWR of transmission line is

 Directly proportional to voltage minimum and inversely proportional to voltage maximum.
  Directly proportional to load impedance and inversely to characteristic impedance.
 Proportional to load and characteristic impedance.
 Directly proportional to characteristic impedance and inversely to load impedance.

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Power Systems
Critical mass is

 a mass of fissionable material required to stop a chain reaction.
 maximum mass of fissionable material required to sustain a chain reaction.
 none of these.
  minimum mass of fissionable material required to sustain chain reaction.

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