2–9. What  component  of  the  propeller shaft assembly takes care of end play? 1. Leaf springs 2. Universal  joints 3. Sprag  unit 4. Slip  joint 2-10. What  component  of  the  propeller shaft  assembly  functions  as  a flexible  coupling? 1. Center  support  joint 2. Universal  joint 3. Coupling  joint 4. Propeller  shaft  bracket 2-11. Which of the following is NOT a fundamental  unit  of  a  universal joint  assembly? 1. Journal 2. Flange yoke 3. Fixed or splined sliding yoke 4. Cross  carrier 2–12. What  problem  is  the  first indication  of  center  support bearing  failure? 1. Excessive  noise 2. Excessive  chassis  vibration 3. Clutch  slippage 4. Rear-end  traction  loss Learning  Objective: Recognize the  components  and  functions  of final  drives  and  differentials. 2-13. What  component  changes  the direction of power from the propeller  shaft  to  the  driving axle? 1. Coupling  shaft 2. Converter  drive 3. Final drive 4. Transfer  case 2–14. What  technique  should  you  use  to determine the gear ratio on a worm gear  final  drive? 1. Divide the number of teeth on the worm gear by the number of teeth on the pinion 2. Multiply  the  number  of  teeth on the worm gear by the number of teeth on the pinion 3. Count the number of teeth on the worm gear for the number of teeth of the driven gear 4. Count  the  revolutions  of  the worm  gear  for  one  revolution of the driven gear 2–15. Which of the following gear type of final drives permits a larger speed reduction? 1. Hypoid 2. Worm 3. Spur  bevel 4. Spiral  bevel 2-16. What  component  allows  one  axle shaft to turn at a speed different from that of the other axle shaft? 1. The  differential 2. The  trunnion 3. The  transfer  case 4. The power takeoff 2-17. Without  a  differential,  one  rear wheel would be forced to skid when turns are made. 1. True 2. False 2-18. On the axle assembly of a truck, what  component  prevents  one  wheel from  spinning? 1. The  propeller  shaft  lock 2. The  countershaft  lock 3. The  anti-skid  lock 4. The  differential  lock 10