A. Strain rate is increased
B. Grain size is increased
C. Prior cold deformation is increased
D. Not affected by any of the above parameters
Related Mcqs:
- While the recrystallisation temperature for pure metals is 0.3 Tm, the same for alloys is equal to ______________ × Tm (where, Tm Melting temperature) ?
A. 0.25
B. 0.45
C. 0.70
D. 0.95 - Recrystallisation temperature of steel is ______________________ °C?
A. 50
B. 300
C. 500
D. 800 - Boiling point of water gets lowered at high altitudes (e.g., hills), because ___________________?
A. Temperature is low
B. Atmospheric pressure is low
C. Atmospheric pressure is high
D. None of these - Corrosion rate cannot be lowered by reducing the ________________ of the corroding medium?
A. Concentration
B. Velocity
C. Temperature
D. None of these - The boiling & freezing points on a newly defined temperature scale in degree ‘D’ are 400°D & 100°D respectively. The temperature reading corresponding to 60°C on this new temperature scale will be equal to _____________ °D ?
A. 140
B. 180
C. 240
D. 280 - Heating the Hypo-eutectoid steels to 30°C above the upper critical temperature line, soaking at that temperature and then cooling slowly to the room temperature to form a pearlite & ferrite structure is called_______________________?
A. Tempering
B. Hardening
C. Annealing
D. Normalising - The ratio of thermal & electrical conductivity is same for all the metals at the same temperature; and at around room temperature, this ratio is proportional to(where, T = absolute temperature, °K) ?
A. T
B. 1/T
C. T2
D. 1/T2 - Which of the following parameters is not responsible for the heat loss from a hot steam carrying bare pipe surface located in a room without fans ?
A. Emissivity of pipe surface
B. Diameter & length of the pipe
C. Temperature of hot pipe surface & that of air in the room
D. None of these - Which of the following low melting alloy containing bismuth and lead is used for electric fuse ?
A. Wood’s metal
B. Babbitt metal
C. Monel metal
D. Duralumin - ____________________ of hard alloy and tool steel is done to make it easily machinable ?
A. Case carburising
B. Tempering
C. Normalising
D. Annealing
