each turn of the drivers a distance circumference or π X 80 or 3.14 >

1. Find the circumference of each of the wheels: 48 in., 56 in., 60 in., and 80 in.

2. Which would travel the farther in m driver or an 80-in. driver? How much f the other? (The distance each wheel goe its circumference.)

3. The 72-in. drivers on a locomotive n How many feet will the locomotive go pe circumference by the number of turns per

How many feet will it go per hr.? (N feet gone over per min. by 60.)

How many miles will it travel per hr. of feet traveled per hr. by 5280.)

4. How many turns will each of the v make in traveling 1 mile if the front tru diam., the drivers are 80 in., and the tra in diam.? (Divide the number of feet in circumference of each of the wheels in ft.)

12. An axle 8 in. in diam. is being tu many turns a minute must it be run so tha not exceed 60 ft. per min.?

13. Piston rings are turned to a diame than the diameter of the cylinder barrel they can be sprung into place. To what be turned for each of the following sizes long a piece must be cut from each so sprung in place it will have 6 in. clearan

14. Find the area of each of the follow 21 in., 23 in. in diam.

15. An air drum is 18 in. in diam. Wha in sq. in.? If the pressure per sq. in. i pressure tending to blow out the end. ( square inches in one end by the pressure p 16. The piston of a locomotive is 24 in. in sq. in. If the highest pressure carried

Piston

FIG. 76.

what would be the total pressure tending head?

17. The diameter of the front head is 7634 in There are 465 tubes whose o What is the area in sq. in. of the fro ducting the area taken up by the ends of

18. If the inside diameter of the tubes what is the total fire area through these t

19. What is the total fire area through there are 173 134-in. tubes whose inside di