Assumptions 1 All the liquids are incompressible. 2 Pressure in the brine pipe remains constant. 3 The
variation of pressure in the trapped air space is negligible.
Properties The specific gravities are given to be 13.56 for mercury and 1.1 for brine. We
1 Oxygen is an ideal gas since it is at a high temperature and low pressure relative to its critical point
values of 154.8 K and 5.08 MPa. 2 The kinetic and potential energy changes are negligible, ke
. 3 Constant specific heats at room t
Analysis (a) The saturation temperature of steam at 3.5 MPa is
Tsat@3.5 MPa = 242.6 C (Table A-5)
Then, the initial temperature becomes
T1 = 242.6+5 = 247.6 C
(b) The properties of steam when the pi
1 The tank is stationary and thus the kinetic and potential energy changes are zero. 2 The device is wellinsulated and thus heat transfer is negligible. 3 The energy stored in the resistance wires, and the heat
transferred to the tank itself i
Assumptions The variation of air density with altitude is negligible.
Properties The density of air is given to be = 1.18 kg/m3. The density
of mercury is 13,600 kg/m3.
Analysis Atmospheric pressures at the top and at the bottom of the
Properties The density of water is given to be
= 1000 kg/m3.
Analysis The pressure at the bottom of the tube can be expressed as
( g h) tube
Solving for h,
Patm= 92 kPa
(115 92) kPa
1 kg m/s 2
1000 N/m 2
(1000 kg/m 3 )(9.81 m/s 2 )
2 63 Fresh and seawater flowing in parallel horizontal pipelines are connected to each other by a double
U tube manometer. The pressure difference between the two pipelines is to be determined.
Assumptions All the liquids are incompressible.
Analysis (a) The specific volume of the refrigerant is
0.05 m3 /kg
0.0007362 m3/kg and
saturated liquid-vapor mixture since
0.14729 m3/kg (Table A-11). Thus the tank contains
, and the pressure must be the saturation pres
University of Windsor
Mechanical & Materials Engineering Program
85-233: FLUID MECHANICS
April 15,1999, 12:00 NOON FINAL EXAMINATION
NOTE: (1) This test has SEVEN problems. Please solve the problems on the test paper.