Answer Key: Self-Test C-1.14
- What would be the output force of a hydraulic press that has an MA of 70 and an input force of 140 N?
- 9,800 N
- If the small piston on a hydraulic jack has a diameter of 3 in., what is its area?
- 7.07 in.2
- What is the pressure in pounds per square inch if 100 pounds of force are applied to a hydraulic system’s piston with an area of 2 in.2?
- 50 psi
- What is the pressure in kPa if 700 N of force is applied to a hydraulic system’s piston with an area of 52 cm2?
- 134.61 kPa
- What is the force exerted by a hydraulic piston that has an area of 3 in.2 and a 50 psi fluid pressure?
- 150 lb.
- What is the force exerted by a hydraulic piston that has an area of 18 cm2 and a 411 kPa fluid pressure?
- 740.54 N
- If the small piston on a hydraulic lift has an area of 2 in.2 and 50 lb. of force are applied to it, what would the area of the larger piston have to be to produce 500 lb. of force?
- 20 in.2
- Complete the following table referring to a hydraulic jack. Show the required values and the proper units.
|
Small piston force |
Small piston diameter |
Small piston area |
Small piston travel distance |
Fluid pressure |
Large piston diameter |
Large piston area |
Large piston travel distance |
Force exerted by large piston |
Mechanical advantage |
|
25 lb. |
2.5 in. |
4.9 cm2 |
63 in. |
5.1 psi |
7.5 in. |
44.18 in.2 |
7 in. |
225.32 lb. |
9 |
|
44 lb. |
3.7 in. |
10.75 cm2 |
14 in. |
4.09 psi |
9.64 in. |
73 in.2 |
2.06 in. |
298.57 lb. |
6.79 |
|
78 lb. |
5.5 in. |
23.76 cm2 |
168 in. |
3.28 psi |
20.56 in. |
332.64 in.2 |
12 in. |
1,092 lb. |
14 |
|
2,375 N |
8 cm |
50.27 cm2 |
1.8 m |
472.45 kPa |
15.96 cm |
200 cm2 |
452 mm |
9,449 N |
3.98 |
|
1,850 N |
7.14 cm |
40 cm2 |
1.05 m |
462.5 kPa |
27.64 cm |
600 cm2 |
70 mm |
693.8 N |
15 |
|
316.8 N |
15.12 cm |
180 cm2 |
3.84 m |
17.6 kPa |
88.27 cm |
6,120 cm2 |
113 mm |
10,770 N |
34 |
