Non drive wheel hubs will have this type and quantity of wheel ...

[dbose]

Non drive wheel hubs will have this type and quantity of wheel bearings:
 
  a. two plain bearing
 b. two self aligning bearings c. one tapered roller bearing
  d. two tapered roller bearings

Question 2

The purpose of the recoil spring that is part of an undercarriage system is:
 
  a. to prevent damage if the track becomes too tight
 b. to keep the track tensioned properly c. to help the machine ride better
 d. to help push the idle out when splitting a track

[mathjasmine]

Answer to Question 1

D

Answer to Question 2

A