Torque is twisting force (the force you feel when a car accelerates) measured by foot-pounds (the distance a one-foot crank can push one pound in a circularmotion).
The umpire will signal the start of the fielding side's choice of powerplay by waving his arm in a circularmotion - and indicate a powerplay chosen by the batting side by waving his arms in a circle and then clapping his hands above his head.