What would you do if the feed water got so hot that the pump worked imperfectly or not at all? II. 370. ... How much would you blow down a boiler? How low ... 373. Pet COCk. a What is the difference between a cylinder pet cock and a cylinder relief valve? II. 373. Relief valves. a What are ... Valve gear. a What is a releasing valve gear? What is a positive valve gear? Volume II., page 374. Packing a smiling box. ... Which guide-bar is the most difficult to oil, the top or the bottom one ? II.
|Title||:||Modern Machine-shop Practice|