146 Introduction to the Study of Science 



REVIEW QUESTIONS 



1. What is the meaning of the heat value of a fuel? 2. What is 

 the unit quantity of heat employed by British and American engineers ? 

 How is it determined? 3. What unit quantity of heat is employed 

 in scientific laboratories and by French engineers? How is it deter- 

 mined? 4. Give several reasons why some kinds of coal are worth 

 more than others. Why may one get more heat for the money, in 

 buying a high-priced coal than in buying a low-priced coal ? 5. What 

 constituent in gasoline gives it a high fuel value ? 6. Give advantages 

 in cooking and heating with electricity, with gas, with coal, with 

 wood. 



