Engineering Fundamentals: An Introduction to Engineering, 4th ed.c

294 Chapter 10 Force and Force-Related Parameters

10.18. Using the information given in Table 10.4, determine

the ratio of local pressure and density to sea-level

values. Estimate the value of air density at the cruising

altitude of most commercial airliners.

10.20.Investigate what the typical range of pressure is in the

following applications: a bicycle tire, home water line,

natural gas line, and refrigerant in your refrigerator’s

evaporator and condenser lines. Present your findings

in a brief report.

10.21.Convert the 130/85 systolic /diastolic pressures given

in millimeters of Hg to Pa, psi, and inH 2 O.

10.22.Determine the load that can be lifted by the hydraulic

system shown in the accompanying figure. All of the

necessary information is shown in the figure.

10.23.Determine the load that can be lifted by the system

shown in Problem 10.22 if R 1 is reduced to 4 cm.

10.24.Determine the load that can be lifted by the system

shown in Problem 10.22 if R 2 is increased to 25 cm.

10.25.Determine the pressure required to decrease the

volume of the following fluids by 2%:

a. water

b. glycerin

c. SAE motor oil

10.26.SAE 30 oil is contained inside a cylinder with inside

diameter of 1-in and length of 1-ft. What is the pres-

sure required to decrease the volume of the oil by 2%?

10.27.Compute the deflection of a structural member made

of aluminum if a load of 500 lb is applied to the bar.

Altitude ( m)

0 (sea level)

1000

3000

5000

8000

10,000

12,000

14,000

15,000

P

Psea level

r

rsea level

Load

R 1 = 5 cm

R 2 = 20 cm

1000 N

Problem 10.22

10.19. Bourdon-type pressure gauges are used in thousands

of applications. A deadweight tester is a device that is

used to calibrate pressure gauges. Investigate the oper-

ation of a deadweight pressure tester. Write a brief

report to discuss your findings.

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