Spot facing is a machining operation for producing a flat seat for bolt head, washer or nut at the opening of a drilled hole. The tool is called a spot facer or a spot facing tool. Spot facing is similar to counter-boring, except that it is shallower. Tools that are used for counter-boring can be used for spot facing as well.
47) Spot facing is done to
Answer is:
Make surface flat so that the bolt head can take proper seat on the surface
Explanation:
Related ISRO Technician-B Fitter Question Paper - 2018 (Set - 1) with Answer Key
Answer is:
Reamer
Explanation:
A reamer is a multipoint cutting tool used for enlarging by finishing previously drilled holes to accurate sizes.
Answer is:
Pitch
Explanation:
Pitch is the distance from a point one thread to a corresponding point on the adjacent thread measured parallel to the axis.
Answer is:
Broaching
Explanation:
Broaching operation is one in which a tool is pushed or pulled through a hole or surface
Answer is:
Hardness
Explanation:
Hardness is a very important property of the metals and has a wide variety of meanings. It embraces many different properties such as resistance to wear, scratching, deformation and machinability etc. It also means the ability of the metal to cut another metal.
The hardness is usually expressed in numbers which are dependent on the method of making the test.