Q. Does a perfect fitting or an imperfect fitting valve have the most friction?
A. An imperfect fitting one.
Q. How would you refit an imperfect fitting or leaky valve?
A. It should be re-faced on a planer or filed and scraped until it fits seat perfectly tight.
Q. How is a steam engine rated?
A. By amount of horse-power developed.
Q. What is a foot-pound?
A. One pound of force exerted through one foot of space.
Q. How many foot-pounds are required to lift 100 pounds one foot?