Best example for driving fit is

12) Best example for shrinkage fit is

Answer is:

Cart rim on the wooden wheel

Explanation:

Best example for shrinkage fit is Cart rim on the wooden wheel.
Shrinkage fit A shrinkage fit is obtained by making the shaft (internal member) slightly larger than the hole (external member). In shrinkage fit, pressure is not required for assembling but instead the hole (external member) is heated and expanded sufficiently to permit the shaft (internal member) to be inserted easily. Then the hole (external member) is cooled to shrink tightly around the shaft (internal member).

13) In hole basic system

The size of the shaft is made constant

The size of the hole is made constant

The permissible tolerances are given on the hole and the shaft

Allowance is given only on the hole

Answer is:

The size of the hole is made constant

Explanation:

In Hole basic system the size of the hole is made constant, different fits is obtained by varying shaft size.

14) Tolerance is given to the part size to

Increase the production

Decrease the production

Finish the components approximately

Produce the parts within the required permissible size error

Answer is:

Produce the parts within the required permissible size error

Explanation:

It is impossible to make anything to an exact size, therefore, it is essential to allow a definite tolerance or permissible variation on every specified dimension. Hence Tolerance is given to the part size to produce the parts, within the required permissible size error.

15) As per BIS system of Limits and fits, there are 18 grades of tolerances represented by number symbols? from

Answer is:

IT01, IT0, IT1 to 16

Explanation:

As per BIS system of Limits and fits, there are 18 grades of tolerances represented by number symbols from IT01, IT0, IT1 to 16.

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Best example for driving fit is

Ball Bearing on the shaft

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12) Best example for shrinkage fit is

Cart rim on the wooden wheel

13) In hole basic system

The size of the hole is made constant

14) Tolerance is given to the part size to

Produce the parts within the required permissible size error

15) As per BIS system of Limits and fits, there are 18 grades of tolerances represented by number symbols? from

IT01, IT0, IT1 to 16

For More Limits and Fits MCQ - Machinist(Set-1) with Answers