Fluid Mechanics: Fundamentals and Applications
4th Edition
ISBN: 9781259696534
Author: Yunus A. Cengel Dr., John M. Cimbala
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 1, Problem 72P
Discuss why pressure tests of pressurized tanks such as steam boilers, pipes, and tanks including gases such as nitrogen, air oxygen, etc. with high pressure are carried out hydrostatically by using liquids such as water and hydraulic oil.
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Chapter 1 Solutions
Fluid Mechanics: Fundamentals and Applications
Ch. 1 - What is a fluid? How does it differ from a solid?...Ch. 1 - Define internal, external, and open-channel flows.Ch. 1 - Define incompressible flow and in compressible...Ch. 1 - Consider the flow of air over the wings of an...Ch. 1 - What is forced flow? How does it differ from...Ch. 1 - How is the Mach number of a flow defined? That...Ch. 1 - When an airplane is flying at a constant speed...Ch. 1 - Consider the flow of air at a Mach number of 0.12....Ch. 1 - What is the no-slip condition? What causes it?Ch. 1 - What is a boundary layer? What causes a boundary...
Ch. 1 - What is a steady-flow process?Ch. 1 - Define stress, normal stress, shear stress, and...Ch. 1 - What are system, surroundings, and boundary?Ch. 1 - When analyzing the acceleration of gases as they...Ch. 1 - When is a system a closed system, and when is it a...Ch. 1 - You are to understand how a reciprocating air...Ch. 1 - What is the difference between pound-mass and...Ch. 1 - In a news ankle, is stated that a recently...Ch. 1 - Explain why the light-year has the dimension of...Ch. 1 - What is the net force acting on a car cruising at...Ch. 1 - A man goes to a traditional market to buy a steak...Ch. 1 - What is the weight, in N, of an object with a mass...Ch. 1 - What is the weight of a 1-kg substance in N,...Ch. 1 - Determine the mass and the weight of the air...Ch. 1 - A 3-kW resistance heater a water beater...Ch. 1 - A195-Ibm astronaut took his bathroom scale (a...Ch. 1 - The acceleration of high-speed aircraft sometimes...Ch. 1 - A 10-kg rock is thrown upward with a force of 280...Ch. 1 - The value of the gravitational acceleration g...Ch. 1 - At 45° latitude: the gravitational acceleration as...Ch. 1 - 1-32 The gravitational constant g is 9.807m/s2 at...Ch. 1 - On average, an adult person breathes in about 7.0...Ch. 1 - While solving a problem, a person ends up with...Ch. 1 - An airplane flies horizontally at 70m/s . Its...Ch. 1 - If the airplane of Prob. 1-35 weighs 17 lbf,...Ch. 1 - The boom of a fire truck raises a fireman (and his...Ch. 1 - A 6-kg plastic tank that has a volume of 0.18m3 is...Ch. 1 - Water at 15°C from a garden hose fills a 1.5 L...Ch. 1 - A forklift raises a 90.5 kg crate 1.80 m. (a)...Ch. 1 - The gas tank of a car is filled with a nozzle that...Ch. 1 - A pool of volume V (in m3) is to filled with water...Ch. 1 - Based on unit considerations alone, show that the...Ch. 1 - What is the importance of modeling in engineering?...Ch. 1 - What is the difference between the analytical and...Ch. 1 - When modeling an engineering process, how is the...Ch. 1 - What is the difference between precision and...Ch. 1 - How do the differential equations in the study of...Ch. 1 - What is the value of the engineering software...Ch. 1 - The weight of bodies may change somewhat from one...Ch. 1 - The reactive force developed by a jet to push an...Ch. 1 - An important design consideration in two-phase...Ch. 1 - Consider the flow of air through a wind turbine...Ch. 1 - A tank is filled with oil whose density is =850...Ch. 1 - If mass, heat, and work are not allowed to cross...Ch. 1 - The speed of an aircraft is given to be 260 m/s in...Ch. 1 - One J/kg is equal to (a) 1kPam3 (b) 1kNm/kg (c)...Ch. 1 - Which is a unit for power? (a) Btu (b) kwh (c)...Ch. 1 - The speed of an aircraft is given to be 950 km/h....Ch. 1 - The weight of a 10-kg mass at sea level is (a)...Ch. 1 - The weight of a 1 -Ibm mass is (a) 1Ibmft/s2 (b)...Ch. 1 - A hydroelectric power plant operates at its rated...Ch. 1 - Write an essay on the various mass- and...Ch. 1 - Search the Internet to find out how to properly...Ch. 1 - Another unit is kgf, which is a force unit used...Ch. 1 - Discuss why pressure tests of pressurized tanks...
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- A child takes a helium balloon on a plane from Denver (with an air pressure of 0.83 atm) on a cool day when the temperature is 20.0oC to Boston (at sea level, with an air pressure of 1.0 atm) where the temperature is 5.0oC. Assume that no gas escapes from the balloon during the flight. What is the volume of the balloon in Boston, relative to its size in Denver? Group of answer choices The volume in Boston is 0.79 times the volume in Denver. The volume in Boston is 0.20 times the volume in Denver. The volume in Boston is 0.87 times the volume in Denver The volume in Boston is 1.3 times the volume in Denver. The volume in Boston is the same as the volume in Denver.arrow_forwardA U-tube manometer indicates a pressure drop of 10 in. water across in an air filter. The air is at 26 C and a pressure of 60 lbf/in2 : (a) What is the pressure drop in lbf/in2 and in atm? (b) What percentage of error is introduced if the density of the air in the manometer leads is neglected. (Air density = 1.168 kg/m3 ) (g =32.17 ft/s2)arrow_forward(a) Indicate whether the following statements are true or false (i) Pressure is always normal; 2. (ii) Pressure is always independent of viscous effects; (ii) (iv) (v) Gauge pressure is the intensity of atmospheric pressure above absolute pressure; A perfect vacuum would yield a zero absolute pressure reading; Pressure intensity is dependent on area.arrow_forward
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- You have just assembled a volume ventilator and performed a leak test. The cycling pressure achieved when the wye was occluded was only 55 cm H2O. Describe the step-by-step procedure you would use to rectify the problem.arrow_forwardConsider a thermometer in Fahrenheit scale and Celsius scale, both thermometers are immersed in a certain fluid. (a) If the numerical readings are identical on both scales, what is the absolute temperature of the fluid? (b) What is the fluid temperature if the Fahrenheit reading is numerically thrice the of the Celsius Reading?arrow_forwardAn object is placed against the center of a spherical mirror and then moved 80An ideal gas at 14.7 °C and a pressure of 2.92 x 105 Pa occupies a volume of 3.40 m?. (a) How many moles of gas are present? (b) If the volume is raised to 5.33 m and the temperature raised to 31.0 °C, what will be the pressure of the gas? (a) Number Units (b) Number Units cm from it along the central axis as the image distance i is measured. The figure gives i versus object distance p out to ps 46 cm. What is the image distance when the object is on the central axis and 76 cm from the mirror?arrow_forward
- Answer the following questions with solution/ detailed explanation: 1. The pressure in an automobile tire depends on the temperature of the air in the tire. When the air temperature is 25°C, the pressure gage reads 210 kPa. If the volume of the tire is 0.025 m3, determine the pressure rise in the tire when the air temperature in the tire rises to 50°C. Also, determine the amount of air that must be bled off to restore pressure to its original value at this temperature. Assume the atmospheric pressure to be 100 kPa.arrow_forwardA 120-litre pressure vessel in a laboratory contains 1.587 kg of air. If the room temperature is 22 C and the atmospheric pressure is 101 kPa. What would be the reading on a pressure gauge? Note any assumptions you have made.arrow_forwardMeasuring the drop in pressure with a manometer as a function of temperature within a sealed container filled with an ideal gas provides a technique to show that the magnitude of "zero absolute temperature" or OK corresponds to -273 °C. If this experiment is conducted, starting at 1 atm and 67 °C, instead of in boiling water, what will the pressure be, in mmHg, when cooled to 0°C?arrow_forward
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