Balls for ball bearings are made of_________________?

Related Mcqs:

The basic constituents of Hastelloy are_________________?

A. aluminium, copper etc B. nickel, molybdenum etc C. nickel, copper, etc D. all of the above E. none of the above...

Chromium in steel_________________?

A. improves wear resistance, cutting ability and toughness B. refines grain size and produces less tendency to carburisation, improves corrosion and heat resistant properties C. improves cutting ability and reduces hardenability D. gives ductility, toughness, tensile strength and anticorrosion properties E. makes steel hard...

Paramagnetic alpha iron changes to gamma iron at_______________?

A. 770°C B. 910°C C. 1440°C D. 1539°C E. none of the above...

Tensile strength of steel can be safely in-creased by________________?

A. adding carbon up to 2.8% B. adding carbon up to 6.3% C. adding carbon up to 0.83% D. adding small quantities of copper E. adding copper and carbon...

A specimen of aluminium metal when observed under microscope shows __________________?

A. B.C.C. crystalline structure B. F.C.C. crystal structure C. H.C.P. structure D. a complex cubic structure E. orthorhombic crystalline structure...