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? 



