A. Vacancy
B. Dislocation
C. Grain boundary
D. All of these
Related Mcqs:
- High relative humidity decreases the evaporative process and as the temperature is increased, the relative humidity decreases. The comfort range for human body is the ambient temperature of 22 to 27°C with relative humidity ranging from _______________ percent ?
A. 5 to 10
B. 15 to 25
C. 45 to 50
D. 75 to 80 - With increase in temperature, the electrical conductivity of a _________________ decreases ?
A. Semi-conductor
B. Metal or alloy
C. Dielectric
D. None of these - Oxide layer formed on the non-ferrous metal surface after its annealing is__________________?
A. Removed by acid pickling
B. Hammered into the surface
C. Removed with coarse emery cloth
D. Left as such to protect the surface - Annealing of white cast iron produces _____________________ iron?
A. Grey
B. Nodular
C. Malleable
D. Spheroidal - ______________________ iron is produced by the annealing of white cast iron?
A. Malleable
B. Nodular
C. Ductile
D. Grey - __________________ of air does not increase with increase in temperature?
A. Density
B. Thermal diffusivity
C. Viscosity
D. Thermal conductivity - With increase in steam pressure, its specific volume decreases ____________________?
A. Rapidly first and then slowly
B. Linearly
C. Slowly first and then rapidly
D. Exponentially - Earing is a defect found in steels after the following metal working operation ?
A. Extrusion
B. Rolling
C. Deep drawing
D. Wire drawing - Pressure required to increase the density of water by about 1% is ____________________ atmosphere?
A. 10
B. 50
C. 200
D. 1000 - 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
