A double-acting cylinder with a 3.0-inch bore operates at 75 psig. It has a stroke of 12 inches and completes 10 complete extend-and-retract strokes per minute. What is the required airflow to this cylinder?

A double-acting cylinder with a 3.0-inch bore operates at 75 psig. It has a stroke of 12
inches and completes 10 complete extend-and-retract strokes per minute. What is the
required airflow to this cylinder? You can ignore the rod diameter for the retract stroke.
9. A volume of 7.5 ft of air is compressed to 2.2 ft. The compression ratio is
A. 4.1. C. 3.4.
B. 2.2. D. 0.29.
11. A pneumatic pipe that’s 60 feet long should have a slope with a drop of about _______
inches from one end to the other.
A. 1.2 C. 7.5
B. 6.0D. 18.0
12. If allowable motor duty cycle is 80%, what size compressor in SCFM is required to supply
a pneumatic system that consumes 60 CFM at 75 psig?
A. 516C. 814
B. 542D. 458
13. Approximately what motor Hp will be required for a two-stage compressor for a 250 SCFM
pneumatic system that operates at 100 psig?
A. 44.75 C. 25.0
B. 41.0 D. 100
16. What is the force required from an actuator to move a 28-pound bracket across a metal
table if the coefficient of sliding friction is 0.28?
A. 5.6 lbC. 28 lb
B. 7.8 lbD. 100 lb
B. 7.8 lbD. 100 lb
17. A pneumatic cylinder must lift a 14-pound weight a distance of 6 inches. The inertial load
is calculated to be 10.5 pounds. What approximate minimum force should be specified for
the cylinder in this application?
A. 11 lb C. 25 lb
B. 15 lb D. 50 lb
18. What would be the minimum bore size for a cylinder if it needed to develop 550 pounds of
force and operate from a pressure of 110 psig?
A. 2.52 in C. 2.98 in
B. 2.75 in D. 3.15 in
19. What torque is produced by a 2.5 Hp air motor that operates at 1800 rpm with 80 psig air
pressure?
A. 9.0 lb-inC. 87.5 lb-in
B. 32 .0 lb-in D. 720 lb-in