Fatigue failure of a material may occur, when it is subjected to _____________ stress?

A. Shafts
B. Flanges
C. Gears
D. Shear blades

A. Aqueous ammonia
B. Beer
C. H2SO4 (95%)
D. Phosphoric acid (95%)

A. Least active
B. Most stable
C. Most active
D. Most noble

A. Brittle
B. Ductile
C. Tough
D. Malleable

A. Is lined with lead
B. Need not be lined
C. Is lined with rubber
D. Is lined with acid-proof bricks

A. Hammer
B. Workpiece
C. Die with hammer
D. Weight on hammer