FARM MOTORS 349 



This sharp suction is very valuable in assisting to vaporize 

 the fuel by the rapid rush of air through the carburetor. 



QUESTIONS 



1. Why is the gasoline or oil engine an important farm motor? 



2. To what class of motors does the gasoline or oil engine belong? 



3. Why is the gas or oil engine an internal-combustion engine? 



4. Why is it correct to speak of the gasoline or oil engine as a gas 

 engine? 



5. Describe the four-stroke cycle type of engine. 



6. Describe the two-stroke cycle type of engine. 



7. Compare the advantages of the two-stroke and four-stroke 

 cycle engines. 



