Discussion
Consider the following statements about machine testing.
1. Type tests prove the design.
2. Routine tests prove each machine's workmanship.
3. Temperature rise is a routine test.
Which are correct?
Answer: D
Correct answer: 1 and 2 only
Statements 1 and 2 give the distinction correctly: type tests prove the design on a sample, routine tests prove each machine as built. Statement 3 misplaces the temperature rise test - it takes many hours and requires full load to be absorbed, so it belongs to the type tests and is not applied to every machine.
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