Topic: Metrology and Inspection
In the H7/g6 fit, the symbol H7 represents:
- A. Shaft with fundamental deviation below the zero line
- B. Hole with fundamental deviation above the zero line
- C. Hole with tolerance zone starting at the basic size
- D. Shaft with tight interference
Answer: C. Hole with tolerance zone starting at the basic size
Explanation: In limits and fits, uppercase letters signify hole tolerances. The letter 'H' represents the standard hole basis system where the lower deviation is exactly zero. This means the tolerance zone strictly starts at the basic size and extends positively.