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A type test on an electrical machine is carried out

  • A.once on a representative machine of a design
  • B.on every machine of that design before it leaves the works
  • C.at intervals throughout the machine's life in service
  • D.only after the machine has suffered a failure in service

Answer: A

Correct answer: once on a representative machine of a design

A type test proves the design rather than the individual machine, so it is done once on a sample and covers every machine subsequently built to it. It includes the tests that are expensive or destructive - temperature rise, efficiency determination, overspeed - which could not be justified on every unit.

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