Elinvar, an alloy used in precision instruments, hair springs for watches, etc. contains the following element as principal alloying element__________________?

Related Mcqs:

Which of the following constituents of steels is softest and least strong ________________?

A. austenite B. pearlite C. ferrite D. cementlte E. bainite...

An example of amorphous material is____________?

A. zinc B. lead C. silver D. glass E. brass...

Super conduction by metals is observed in the temperature range of_________________?

A. below 10°K B. above 100°K C. around 0°C D. around 100°C E. above 1000°C...

The presence of sulphur in pig iron makes__________________?

A. it easily machinable B. it brittle C. it hard D. the casting unsound E. increases the fluidity...

Addition of silicon to aluminium results in____________________?

A. improvement of casting characteristics B. improvement of corrosion resistance C. one of the best known age and precipitation-hardening systems D. improving machinability E. none of the above...