2–31.2–32.2-29.Gears B and C in the geararrangement shown in figure 2C arerigidly fixed together.If gear Ais turned counterclockwise at arate of 120 rpm, in what directionand at what rate will gear D turn?1.Clockwise at 20 rpm2.Clockwise at 50 rpm3.counterclockwise at 50 rpm4.Counterclockwise at 100 rpm2–30.The product of all the drivingteeth of a turbine reductiongearing is 400 and the product ofthe driven teeth is 4,000.Whenthe output shaft turns at 200 rpm,the turbine turns ato1.200 rpm2E.2.400 rpm3.2,000 rpm2–33.4.4,000 rpm2–34.2–35.The speed ratio of the gear trainin figure 2D is 2 to 1.If gear Bis removed and gear C is placed sothat it runs directly off gear A.the1.2.3.4.The1.2.3.4.speed ratio will be2.0 to 12.4 to 13.0 to 14.0 to 1purpose of an idler gear is toincrease the speed ratiotake up lost motionchange the direction ofrotationkeep another gear in placeItems 2–33 through 2–36on the gear train shownWhich gear serves as an1. D2. C3. B4. Aare basedin figureidler gear?If gear A turns at 300 rpm, howfast does gear G turn?1.180 rpm2.100 rpm3.87 rpm4.80 rpmWhat is the mechanical advantage ofthe train?1.Five2. Two3.Three4.Four16

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