A dimension is stated as Dia 25 H7 in a drawing. The lower limit is 25.00 mm.

For 25 H7 Tolerance Grade

Basic Size = 25.000 mm

ES = +21 Microns = 0.021 mm

EI = 0 Microns = 0.000 mm

Hence

Lower limit = Basic Size + EI = 25.000 + 0.000 = 25.000 mm

Upper Limit = Basic Size + ES = 25.000 + 0.021 = 25.021 mm

Hence A dimension is stated as Dia 25 H7 in a drawing. The lower limit is 25.000 mm.

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**4) **A dimension is stated as Dia 25 H7 in a drawing. The lower limit is ?

**Answer is:**

## 25.00 mm

**Explanation:**

**Related Limits and Fits MCQ - Machinist(Set-1) with Answers**

**Answer is:**

### 0.04 mm

**Explanation:**

A dimension is stated as 25 +/-0.02 mm in a drawing. Then

Basic Size = 25.000 mm

Upper Tolerance = + 0.02 mm

Lower Tolerance = - 0.02 mm

Total Tolerance = 0.02 + 0.02 = 0.04 mm

**Answer is:**

### Tolerance

**Explanation:**

Tolerance is defined as the difference between the maximum and the minimum sizes allowed in manufactured components.

**Answer is:**

### Actual size

**Explanation:**

The measured size of the dimension of a component is called Actual size.

**Answer is:**

### Interference fit

**Explanation:**

If the tolerance zone of the pin is entirely above of that hole, then the fit obtained is called as interference fit.

**Interference Fit** Interference fit is defined as the fit established when a negative clearance exists between the sizes of the holes and the shaft. In Interference fit, the minimum permitted diameter of the shaft is larger than the maximum allowable diameter of the hole.

Examples for Interference Fit are: Bearing bushes, small end in the connecting rod.