INTERNATIONAL UNIVERSITY
Department of Civil Engineering
Quarter 6, Linh trung Ward, Thu Duc District, HoChiMinh City MIDTERM EXAMINATION
DATE: ……………, 2018 – Duration: 60 minutes
SUBJECT: Fluid Mechanics
Dean of Department of Civil Engineering Lecturer: Signature: Signature: Assoc. Prof. Lê Văn Cảnh Assoc. Prof. Phạm Ngọc
Note: (This is an OPENED - BOOK examination)
No dictionary and internet access
Discussion is strictly prohibited
Do not copy from friends Calculator is allowed QUESTION 1: (20 marks)
Ten cubic feet of air at 1000F and 50 lb/in.2 absolute are compressed isothermally to 2
cubic feet. What is the pressure when the air is reduced to this volume? What is the
modulas of elasticity at the beginning and end of the compression? QUESTION 2: (20 marks)
A space of 2-in. width between two large plane surfaces is filled with oil at 60,50 F. What
force is required to drag a very thin plate of 5 ft2 area between the surfaces at speed of
0,5 ft/sec if this plate remains equidistant from the two surfaces? If it is distance of 0,5 in from one of the surfaces? 1
QUESTION 3 (20 marks):
With the manometer reading as shown, calculate px QUESTION 4: (40 marks)
This half conical buttress is used to support a half cylindrical
tower on the upstream face of a dam. Calculate the vertical
and horizontal components of force exerted by the water on the buttress Good luck! 2