Which of the following commonly used condenser tube materials has the lowest thermal conductivity ?

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With increase in annealing temperature, the following defect density decreases?

A. Vacancy B. Dislocation C. Grain boundary D. All of these...

Presence of nickel & chromium in steel does not raise its _________________?

A. Elastic limit B. Machining properties C. Ductility D. Resilience...

Pick out the wrong statement about the machinability of metals. Machinability of a metal ?

A. Decreases with increase in strain hardening tendencies B. Decreases with increase in hardness, in general C. Depend on the composition, microstructure and physical & mechanical properties D. Decreases with increases in tensile strength & decrease in grain size...

Wave length of X-rays is about 1 angstrom; however it cannot pass through a sheet of ________________?

A. Paper B. Cloth C. Lead D. Aluminium...

A pycnometer is used for the measurement of________________________?

A. Flow rate of molten metal B. Specific gravity of a liquid C. Composition of alloys D. Concentration of a solution...