Pe 4th Part A Absa Test Bank Questions With Complete Solutions Graded To Pass!!

A unit of stress is a) mm/m b) kPa c) kg/sq cm d) Nm e) kg/m squared {Ans: b) kPa}A 8 m bar is pivoted at 5 m from the left end. A force of 15 N is applied downward on the left end and a force of 20 N is applied downward on the right end. What would be the clockwise and counter-clockwise moments and in which direction would the bar rotate? a) 60 Nm counter-clockwise, 75 Nm clockwise, counter-clockwise rotation b) 60 Nm counter-clockwise, 75 Nm clockwise, clockwise rotation c) 75 Nm counter-clockwise, 60 Nm clockwise, clockwise rotation d) 75 Nm counter-clockwise, 60 Nm clockwise, counter-clockwise rotation e) 60 Nm counter-clockwise, 60 Nm clockwise, equilibrium {Ans: d) 75 Nm counter-clockwise, 60 Nm clockwise, counter-clockwise rotation}A gear has 1,000 teeth and revolves at 50 r/min. The driven gear has 32 teeth. How fast does it turn? a) 12.2 r/min b) 1,562.5 r/min c) 609.8 r/min d) 640 r/min e) 390.2 r/min {Ans: b) 1,562.5 r/min}The ability of a material to retain its deformed shape when the load causing deformation is removed is called a) stiffness b) ductility c) hardness d) plasticity e) elasticity {Ans: d)