# Fluid Mechanics Practice Exam+solutions

Jun 26th, 2016
Studypool Tutor
University of Texas at Austin
Price: \$5 USD

Tutor description

30 question exam with solutions and explanations. Contains both Multiple choice and free response. Conceptually challenging, good practice.

Word Count: 2840
Showing Page: 1/10
sarwar (ss75322) Unit 1- Fluids lesmeister (250373002)This print-out should have 30 questions.Multiple-choice questions may continue onthe next column or page find all choicesbefore answering.001 (part 1 of 2) 10.0 pointsIn a car lift, compressed air exerts a force on apiston with a radius of 2.05 cm. This pressureis transmitted to a second piston with a radiusof 10.7 cm.How large a force must the compressed airexert to lift 12300 N car?1003 10.0 pointsThe four tires of an automobile are inflatedto an absolute pressure of 1.9 105 Pa. Eachtire has an area of 0.025 m2 in contact withthe ground.Determine the weight of the automobile.Correct answer: 19000 N.Explanation:Let : P = 1.9 105 Pa andA = 0.025 m2 .Correct answer: 451.487 N.Explanation:Let : r1 = 2.05 cm ,r2 = 10.7 cm , andF2 = 12300 N .P1 = P2 F2F1 = A1A2F2r122= r1 = F2 2 r22r22(2.05 cm)= 12300 N (10.7 cm)2Fg = 4 P A= 4 (1.9 105 Pa) (0.025 m2 )= 19000 N .004 10.0 pointsAn engineer weighs a sample of mercury ( =13.6 103 kg/m3 ) and finds that the weightof the sample is 7.5 N.What is the samples volume? The acceleration of gravity is 9.81 m/s2 .Correct answer: 5.62151 105 m3 .Explanation:= 451.487 N .Let :W = 7.5 N , = 13.6 103 kg/m3 ,g = 9.81 m/s2 .002 (part 2 of 2) 10.0 pointsWhat pressure produces this force? Neglectthe weight of the pistons.m=5Correct answer: 3.4197 10 Pa.Wg

## Review from student

Studypool Student
" Only issue was the guy's response time which was a bit long, which made me a bit anxious. Reached out to the help desk and they helped me out, turns out the tutors aren't all from US which meant there was a time difference. No issues on the quality. "

1825 tutors are online

### Other Documents

Brown University

1271 Tutors

California Institute of Technology

2131 Tutors

Carnegie Mellon University

982 Tutors

Columbia University

1256 Tutors

Dartmouth University

2113 Tutors

Emory University

2279 Tutors

Harvard University

599 Tutors

Massachusetts Institute of Technology

2319 Tutors

New York University

1645 Tutors

Notre Dam University

1911 Tutors

Oklahoma University

2122 Tutors

Pennsylvania State University

932 Tutors

Princeton University

1211 Tutors

Stanford University

983 Tutors

University of California

1282 Tutors

Oxford University

123 Tutors

Yale University

2325 Tutors