Mechanical Engineering - Production Engineering

1. 

Dielectric is used in

A. electro-chemical machining
B. ultra-sonic machining
C. electro-discharge machining
D. laser machining

Answer: Option C

Explanation:

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2. 

The type of reamer used for reaming soft aluminium or copper, is

A. straight fluted reamer
B. left hand spiral fluted reamer
C. right hand spiral fluted reamer
D. any one of these

Answer: Option B

Explanation:

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3. 

The tool material, for faster machining, should have

A. wear resistance
B. red hardness
C. toughness
D. all of these

Answer: Option D

Explanation:

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4. 

The helix angle of a drill is more than 30° for drilling aluminium.

A. Agree
B. Disagree

Answer: Option A

Explanation:

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5. 

In a single point turning operation with a cemented carbide and steel combination having a Taylor exponent of 0.25, if the cutting speed is halved, then tool life will become

A. half
B. two times
C. eight times
D. sixteen times

Answer: Option D

Explanation:

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