FARM MOTORS 375 



2. To what kinds of work is the present gas tractor adapted? 



3. What are some of the advantages and disadvantages of the 

 multiple-cylinder engine for a tractor? 



4. Why is the clutch an important part of the gas tractor? 



5. Describe the differences in the shoe, cone, and multiple-disk 

 clutches. 



6. Why is the gearing an important part of a gas tractor? 



7. How may a change of speed be accomplished? 



8. What is the purpose of the frame? 



. 9. Describe two styles of steering wheels. 



10. Discuss the construction of traction wheels. 



11. Why should the equipment of the tractor be given careful con- 

 sideration? 



