Related Questions

Cold working of a material results in increase in hardness, which is termed as the __________ hardening.
A Cold
B Work
C Age
D Induction
The only suitable method for hardening the low carbon steel is case hardening. Which of the following is a case hardening process?
A Cyaniding
B Sheardising
C Spherodising
D None of these
Strain hardening effect in a metal subjected to cold working is due to the __________ mechanism.
A Fracture
B Dislocation
C Slip
D Twinning
Strain hardening effect in metals subjected to cold working is due to the __________ mechanism.
A Slip
B Fracture
C Winning
D Dislocation
The increase in hardness due to cold working, is called
A Age hardening
B Work hardening
C Induction hardening
D Flame hardening
Two men and women are entrusted with a task. The second man needs three hours more to cope up with the job than the second man and the woman would need working together. The first man, working alone, would need as much time as second man and the woman working together. The first man working alone, would spend eight hours less than the double period of the time second man would spend working alone. How much time would the two men and the women need to complete the task if they all asked together?
A 1 hour
B 2 hours
C 3 hours
D 4 hours
E 5 hours
In cold working of metal as compared to its hot working
A Cracks and blow holes are eliminated
B Ductility and impact strength improves
C Appreciable strain hardening is produced
D Yield stress, hardness and fatigue strength is not at all affected
Which is false statement about case hardening? Case hardening is done by
A Electroplating
B Cyaniding
C Induction hardening
D Nitriding
Grain hardness is measured by the __________ hardness testing method.
A Knoop
B Rockwell F
C Shore sceleroscope
D Vicker's
Presence of __________ hardness is responsible for the temporary hardness in water.
A Carbonate
B Calcium
C Choride
D Sulphate

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