The design of mechanical parts is particularly important in case of __________ speed machines?
Correct answer: C. high
- A. low
- B. medium
- C. high
- D. any of the above
Explanation
Mechanical design becomes especially critical at high speed because centrifugal forces, vibration, bearing stress, and rotor unbalance increase rapidly with speed. Low- and medium-speed machines generally face less severe mechanical stress.
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