When the temperature of a solid metal increases,
A. Strength of the metal decreases but ductility increases
B. Both strength and ductility of the metal decreases
C. Both strength and ductility of the metal increases
D. Strength of the metal increases but ductility decreases
Answer: Option A
Solution(By Examveda Team)
When the temperature of a solid metal increases, its intramolecular bonds are brake and strength of solid metal decreases. Due to decrease its strength, the elongation of the metal increases, when we apply the load i.e. ductility increasesThis Question Belongs to Mechanical Engineering >> Manufacturing And Production Technology
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Comments ( 1 )
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
But I have a doubt, in powder metallurgy we do sintering which is a heat treatment to make the metal more stronger.