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Mechanical Engineering - Production Engineering

Exercise : Production Engineering - Section 5
21.
Tool life is generally better when
grain size of the metal is large
grain size of the metal is small
hard constituents are present in the microstructure of the tool material
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
When the metal is removed by erosion caused by rapidly recurring spark discharges between the tool and work, the process is known as
electro-chemical machining
electro-discharge machining
ultra-sonic machining
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
23.
Cemented carbide tools are generally poor in shear.
Yes
No
Answer: Option
Explanation:
No answer description is available. Let's discuss.
24.
Which of the following statement is wrong as regard to down milling?
It can not be used on old machines due to backlash between the feed screw of the table and the nut.
The chips are disposed off easily and do not interfere with the cutting.
The surface milled appears to be slightly wavy.
The coolant can be poured directly at the cutting zone where the cutting force is maximum.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
25.
In reaming process
metal removal rate is high
high surface finish is obtained
high form accuracy is obtained
high dimensional accuracy is obtained
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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