# Manufacturing Engineering Questions & Answers – Metrology-2

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This set of tricky Manufacturing Engineering Questions & Answers focuses on “Metrology-2”.

1. In an assembly of hole and shaft, smallest hole was having diameter of 49.98 mm and largest shaft was having diameter of 49.94 mm. Minimum clearance in mm will be
a) .08
b) .03
c) .001
d) .04

Explanation: Minimum clearance is the difference between size of smallest hole and size of biggest shaft. Maximum clearance is given by sum of size of biggest hole and smallest shaft.

2. In an assembly of hole and shaft, smallest shaft was having diameter of 49.98 mm and largest hole was having diameter of 50.14 mm. Maximum clearance in mm will be
a) 0.23
b) 0.26
c) 0.32
d) 0.12

Explanation: Maximum clearance is given by sum of size of biggest hole and smallest shaft. Minimum clearance is the difference between size of smallest hole and size of biggest shaft.

3. In an assembly of hole and shaft, largest shaft was having diameter of 50.18 mm and smallest hole was having diameter of 49.98 mm. Maximum interference in mm will be
a) 0.2
b) 0.3
c) 0.3
d) 0.1

Explanation: Maximum Interference is the difference between size of largest haft size and smallest hole size. Minimum interference is the difference between size of smallest shaft and size of biggest hole.

4. In an assembly of hole and shaft, minimum shaft diameter is 49.36 mm and maximum shaft diameter is 48.20 mm. It is an example of
a) Clearance fit
b) Interference fit
c) Transition fit
d) None of the mentioned

Explanation: When size of smallest shaft is more than size of biggest hole then it is
Interference fit. Maximum Interference is the difference between size of largest haft size and smallest hole size.

5. In an assembly of hole and shaft, smallest shaft was having diameter of 50.16 mm and largest hole was having diameter of 50.14 mm. Minimum interference in mm will be
a) 0.2
b) 0.3
c) 0.3
d) 0.1

Explanation: Minimum interference is the difference between size of smallest shaft and size of biggest hole. Maximum Interference is the difference between size of largest haft size and smallest hole size.
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6. Maximum material limit of shaft is
a) Maximum diameter of hole
b) Maximum diameter of shaft
c) Smallest diameter of hole
d) Minimum diameter of shaft

Explanation: Maximum material limit of shaft is maximum diameter of shaft. Minimum material limit of shaft is minimum diameter of shaft.

7. Maximum material limit of hole is
a) Maximum diameter of hole
b) Maximum diameter of shaft
c) Smallest diameter of hole
d) Minimum diameter of shaft

Explanation: Maximum material limit of hole is smallest diameter of hole. Minimum material limit of hole is largest diameter of hole.

8. Minimum material limit of shaft is
a) Maximum diameter of hole
b) Maximum diameter of shaft
c) Smallest diameter of hole
d) Minimum diameter of shaft

Explanation: Minimum material limit of shaft is minimum diameter of shaft. Maximum material limit of shaft is maximum diameter of shaft.

9. Minimum material limit of hole is
a) Maximum diameter of hole
b) Maximum diameter of shaft
c) Smallest diameter of hole
d) Minimum diameter of shaft

Explanation: Minimum material limit of hole is largest diameter of hole. Maximum material limit of hole is smallest diameter of hole.

10. Allowance of hole and shaft assembly is equal to
a) Sum of maximum metal limit
b) Product of Maximum limit
c) Difference of maximum metal limit
d) None of the mentioned

Explanation: Allowance of hole and shaft assembly is equal to the difference of maximum metal limit.

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