Both A and R are true and R is the correct explanation of A

Both A and R are true and R is not the correct explanation of A

A is true but R is false

A is false but R is true

An active device and converts mechanical displacement into change of resistance

A passive device and converts mechanical displacement into change of resistance.

A passive device and converts electrical displacement into change of resistance

An active device and converts electrical displacement into change of resistance.

A and D only

C and D only

B only

D only

Below 910 Degree Centigrade, pure iron exists in FCC crystal structure.

Between 1537 Degree Centigrade and 1400 Degree Centigrade, iron exists as pearlite.

In the iron-carbon equilibrium diagram the eutectic point is at 6?67% of C.

None of these

to increase red hardness and sustain hardness during tempering

to increase softness and weldability

to promote deoxidisation and nitriding.

to promote grain growth and machinability