Fundamentals Of Engineering Thermodynamics
9th Edition
ISBN: 9781119391388
Author: MORAN, Michael J., SHAPIRO, Howard N., Boettner, Daisie D., Bailey, Margaret B.
Publisher: Wiley,
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Chapter 1, Problem 1.29P
To determine
Pressure difference of venturi meter points.
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2. The diameters of the suction and discharge pipes of a pump are 15 and 10 cm, respectively.
The discharge pressure is read by a gage at a point 1.5 m above the centerline of the pump and
the suction pressure is read by a gage 0.6 m below the centerline. If the pressure gage reads
140 kPa and the suction gage reads a vacuum of 21 cm Hg when gasoline is pumped at the rate
of 35 l/sec (sg of gasoline is 0.75)
a. Find the energy added by a pump. (.
b. Find the power delivered to the fluid in kW.
c. Find the required rating horsepower of the pump if it has an efficiency of 75%
0.10 mg
Pz=140 kPa
1.5 m
0.6 m
KD
Pj=-0.21 m Hg
0.15 mø
A manometer connects an oil pipeline and a water pipeline as shown in Fig.1.
Determine the difference in pressure between the two pipelines using the readings
on the manometer. Use SGoi=0.86, SGHg=13.6.
Air
Water
8 cm
6 cm
4 cm
Oil
Mercury
Fig.1
An open tube mercury manometer is used to measure the pressure in an
oxygen tank. When the atmospheric pressure is 1040 mbar, what is the
absolute pressure (in Pascal) in the tank if the height of the mercury in the
open tube is 28 cm higher? (density of mercury = 13.6 X 10° kg/m³) *
O 1.41 X10 pa
O 2.34 X105 pa
O 1.82 X105 pa
O 2.12 X105 pa
Chapter 1 Solutions
Fundamentals Of Engineering Thermodynamics
Ch. 1 - Prob. 1.2ECh. 1 - Prob. 1.3ECh. 1 - Prob. 1.4ECh. 1 - Prob. 1.5ECh. 1 - Prob. 1.6ECh. 1 - Prob. 1.7ECh. 1 - Prob. 1.8ECh. 1 - Prob. 1.9ECh. 1 - Prob. 1.10ECh. 1 - Prob. 1.11E
Ch. 1 - Prob. 1.12ECh. 1 - Prob. 1.13ECh. 1 - Prob. 1.14ECh. 1 - Prob. 1.1CUCh. 1 - Prob. 1.2CUCh. 1 - Prob. 1.3CUCh. 1 - Prob. 1.4CUCh. 1 - Prob. 1.5CUCh. 1 - Prob. 1.6CUCh. 1 - Prob. 1.7CUCh. 1 - Prob. 1.8CUCh. 1 - Prob. 1.9CUCh. 1 - Prob. 1.10CUCh. 1 - Prob. 1.11CUCh. 1 - Prob. 1.12CUCh. 1 - Prob. 1.13CUCh. 1 - Prob. 1.14CUCh. 1 - Prob. 1.15CUCh. 1 - Prob. 1.16CUCh. 1 - Prob. 1.17CUCh. 1 - Prob. 1.18CUCh. 1 - Prob. 1.19CUCh. 1 - Prob. 1.20CUCh. 1 - Prob. 1.21CUCh. 1 - Prob. 1.22CUCh. 1 - Prob. 1.23CUCh. 1 - Prob. 1.24CUCh. 1 - Prob. 1.25CUCh. 1 - Prob. 1.26CUCh. 1 - Prob. 1.27CUCh. 1 - Prob. 1.28CUCh. 1 - Prob. 1.29CUCh. 1 - Prob. 1.30CUCh. 1 - Prob. 1.31CUCh. 1 - Prob. 1.32CUCh. 1 - Prob. 1.33CUCh. 1 - Prob. 1.34CUCh. 1 - Prob. 1.35CUCh. 1 - Prob. 1.36CUCh. 1 - Prob. 1.37CUCh. 1 - Prob. 1.38CUCh. 1 - Prob. 1.39CUCh. 1 - Prob. 1.40CUCh. 1 - Prob. 1.41CUCh. 1 - Prob. 1.42CUCh. 1 - Prob. 1.43CUCh. 1 - Prob. 1.44CUCh. 1 - Prob. 1.45CUCh. 1 - Prob. 1.46CUCh. 1 - Prob. 1.47CUCh. 1 - Prob. 1.48CUCh. 1 - Prob. 1.49CUCh. 1 - Prob. 1.50CUCh. 1 - Prob. 1.51CUCh. 1 - Prob. 1.52CUCh. 1 - Prob. 1.53CUCh. 1 - Prob. 1.54CUCh. 1 - Prob. 1.55CUCh. 1 - Prob. 1.56CUCh. 1 - Prob. 1.57CUCh. 1 - Prob. 1.58CUCh. 1 - Prob. 1.4PCh. 1 - Prob. 1.5PCh. 1 - Prob. 1.6PCh. 1 - Prob. 1.7PCh. 1 - Prob. 1.8PCh. 1 - Prob. 1.9PCh. 1 - Prob. 1.10PCh. 1 - Prob. 1.11PCh. 1 - Prob. 1.12PCh. 1 - Prob. 1.13PCh. 1 - Prob. 1.14PCh. 1 - Prob. 1.16PCh. 1 - Prob. 1.17PCh. 1 - Prob. 1.18PCh. 1 - Prob. 1.19PCh. 1 - Prob. 1.20PCh. 1 - Prob. 1.21PCh. 1 - Prob. 1.22PCh. 1 - Prob. 1.23PCh. 1 - Prob. 1.24PCh. 1 - Prob. 1.25PCh. 1 - Prob. 1.26PCh. 1 - Prob. 1.27PCh. 1 - Prob. 1.28PCh. 1 - Prob. 1.29PCh. 1 - Prob. 1.30PCh. 1 - Prob. 1.31PCh. 1 - Prob. 1.32PCh. 1 - Prob. 1.33PCh. 1 - Prob. 1.34PCh. 1 - Prob. 1.35PCh. 1 - Prob. 1.36PCh. 1 - Prob. 1.37PCh. 1 - Prob. 1.38PCh. 1 - Prob. 1.39PCh. 1 - Prob. 1.40PCh. 1 - Prob. 1.41PCh. 1 - Prob. 1.42PCh. 1 - Prob. 1.43PCh. 1 - Prob. 1.44PCh. 1 - Prob. 1.45PCh. 1 - Prob. 1.46PCh. 1 - Prob. 1.47PCh. 1 - Prob. 1.48PCh. 1 - Prob. 1.49P
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- 3. The reading of an automobile gage is proportional to the gage pressure at the bottom of the tank as shown. The tank is 32 cm deep. Unit weight of gasoline is 6670 N/m³ and that of air is 11.8 N/m³. Unit weight of water is 9790 N/m³. Vent Air Gasoline Water a. Determine the gage reading when the tank is full of gasoline. b. How many cm of air remains at the top when the gage indicates full and the tank is contaminated with 3 cm of water? c. Determine the pressure at the interface of the gasoline and water when the gage indicates full.arrow_forwardIf the specific volume of a certain gas is 0.7848 m^3/kg, what is its specific gravity?arrow_forwardTwo (2) water reservoirs are connected to each other, as shown below. If the pressure difference between the two tanks is 21.6 kPa, calculate the value of "a" in mm. Water A Water 26.8 cm 2a B Mercury SG = 13.6 Note: Round-off only on your final answer, in four decimal places.arrow_forward
- T F The specific weight of a fluid is the product of the fluid's density and the acceleration due to gravity. Stronger surface tension leads to higher capillary rise. Absolute pressures are frequently negative. If the pressure of fluid drops below the vapor pressure of that fluid at that temperature, the fluid will cavitate. F F T F F Density can be measured in lb;/ft° in the English system of units. For a hydrostatic incompressible fluid, pressure is independent of depth. A fluid with a high bulk modulus of elasticity is more difficult to compress than one with a low bulk modulus of elasticity. Viscosity is caused, in part, by the surface tension within a fluid. A fluid can resist an applied shear stress by deforming. Pressure increases faster with depth in less dense fluids than in more dense fluids. T F F F F Farrow_forwardThere is nitrogen gas in a pressurized tank. A manometer measures the pressure using two immiscible fluids (A and B), one end is open to the atmosphere. The density of fluid A is 2400 kg/m^3 and fluid B is 1600 kg/m^3. The height of fluid A is equal on either side of the manometer. Fluid B rises 1m above fluid A. Atmospheric pressure is 97 kPA. Gravity is 9.81 m/s^2. a.) What are two assumptions needed for the problem? b.) Write a force balance for the problem and find the pressure of nitrogen in the tank c.) If temperature of the tank is 300 C, what is the specific volume of nitrogen in the tank if nitrogen is an ideal gas at 300 C?arrow_forwardIn measuring the flow of fluids in a pipeline, a differential manometer, as shown in Fig. E1.26, can be used to determine the pressure difference across an orifice plate. The flow rate can be calibratedi with the observed pressure drop. Calculate the pressure drop p- Pa in pascal. Fluid Oritice Woter, p-10 kg/m -32 mm 10mm - Manometer fluid, R-10 x 10 hg /m Figure El.26arrow_forward
- EXAMPLE 2.2 A manometer connects an oil pipeline and a water pipeline as shown in Fig. 2.4. Determine the difference in pressure between the two pipelines using the readings on the manometer. Use Soil = 0.86 and SHg = 13.6. Air Water 8 cm 6 сm 4 сm Mercury Oil Figure 2.4arrow_forwardAside from the movable wire setup, another method to determine the surface tension of a fluid is by actual measurement of capillary rise or fall. Suppose a 2.3 mm diameter tube is inserted to a liquid whose density is 771 kg/m³, it is observed that the liquid rises 10 mm in the tube, making a contact angle of 30°. Determine the surface tension in N/m. Write your answer to four decimal places.arrow_forward1. Consider the following diagram. The fluid flowing in the pipe is oil (SG = 0.830). The fluid in the manometer is water (SG = 1.00). Water, pw = 1000 kg/m³ 7 cm Oil, p = 830 kg/m³ a. Determine P₂ - P₁ in kPa. b. Determine the direction of flow. (Left to right, or right to left). Explain why this is the case. c. The height of oil between the manometer and the pipe is unknown. Explain how you can still solve the problem without knowing this height. Would this height ever matter? Hint: consider practical issues of design. Could the height be 0 cm? Could it be 1000 cm?arrow_forward
- The Louisiana Superdome has an interior volume of 125 million ft3, covered by a 440,000 ft² roof. On a particular day, the interior air pressure gave a manometer reading of 19 inches mercury (pHg = 13.6 g/cm³). Local atmospheric pressure is 102 kPa. 1. kg Calculate the mass of the air inside, assuming an average temperature of 20 °C. 2. kN Calculate the net force applied to the roof by the interior/exterior air (do not account for the weight of the roof). Assume the roof is flat.arrow_forward1.124 ▸ WILEY As shown in Video V1.9, surface tension forces can be strong enough to allow a double-edge steel razor blade to "float" on water, but a single-edge blade will sink. Assume that the surface tension forces act at an angle 0 relative to the water sur- face as shown in Fig. P1.124. (a) The mass of the double-edge blade is 0.64 × 10-³ kg, and the total length of its sides is 206 mm. Determine the value of 0 required to maintain equilibrium be- tween the blade weight and the resultant surface tension force. (b) The mass of the single-edge blade is 2.61 × 10-³ kg, and the total length of its sides is 154 mm. Explain why this blade sinks. Support your answer with the necessary calculations. Blade Surface tension force Karrow_forwardThe pascal (Pa) is actually a very small unit of pressure. Given 1 Pa = 1 N/m^2 and atmospheric pressure at sea level is 101.325 kN/m^2. How many pascals is this?arrow_forward
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