acts when external load is applied

becomes zero when external load is removed

is independent of external loads

is always harmful

best method

extremely hazardous

has no effect as regards fatigue strength

cheapest method

surface

just below the surface

within the core

none of the above.

finishing and polishing

shot-peening

decarburisation

electroplating

a member made of steel will generally be more rigid than a member of equal load-carrying ability made of cast iron

a member made of cast iron will generally be. more rigid than a member of equal load carrying ability made of steel

both will be equally rigid

which one is rigid will depend on several other factors