Threading is an operation of
A. Smoothing and squaring the surface around a hole
B. Sizing and finishing a small diameter hole
C. Producing a hole by removing metal along the circumference of a hollow cutting tool
D. Cutting helical grooves on the external cylindrical surface
Answer: Option D
This Question Belongs to Mechanical Engineering >> Manufacturing And Production Technology
The carbide tools operating at very low cutting speeds (below 30 m/min)
A. Reduces tool life
B. Increases tool life
C. Have no effect on tool life
D. Spoils the work piece
The type of reamer used for reaming operation in a blind hole, is
A. Straight fluted reamer
B. Left hand spiral fluted reamer
C. Right hand spiral fluted reamer
D. Any one of these
High speed steel tools retain their hardness up to a temperature of
A. 250°C
B. 350°C
C. 500°C
D. 900°C
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