Theory and Design for Mechanical Measurements
6th Edition
ISBN: 9781118881279
Author: Richard S. Figliola, Donald E. Beasley
Publisher: WILEY
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Textbook Question
Chapter 9, Problem 9.42P
A 6-mm-diameter pitot-static tube is used as a working standard to calibrate a hot-wire anemometer in 20 °C air. If dynamic pressure is measured using a water-filled micromanometer, determine the smallest manometer deflection for which the pitot- static tube can be considered as accurate without correction for viscous effects.
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Question 2
Calculate the sensitivity of U-tube manometer containing liquid of density 1500 kg/m³ and one limb of the manometer is inclined at 60° from the vertical.
"C-Type Bourdon Tube is a device in which the pressure responsive element is made of a
thin metal tube with a deep circumference when the pressure changes as the elastic elements
increase or decrease. A pointer is connected to it which indicates reading on the circular dial.
It expands when the pressure increases and when the pressure is low the elastic elements in
the pressure gauge are contracts".
Based on an above statement, show the C-type bourdon tube pressure transducer while the
pressure is working.
Fig shows a U-tube differential manometer connecting two pressure pipes at A and B. Pipe A contains a liquid of specific gravity 1.5
under the pressure of 110 kN/m². The pipe B contains oil of specific gravity 0.5 under the pressure of 216 kN/m². Find the difference
of pressure measured by mercury as fluid filling U-tube in mm. The value of x and y are 2.1 m and 1.1 m respectively.
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The Mercury level difference (h) in mm
Chapter 9 Solutions
Theory and Design for Mechanical Measurements
Ch. 9 - Prob. 9.1PCh. 9 - 9.2 State the following pressures as absolute...Ch. 9 - A water-filled manometer is used to measure the...Ch. 9 - Prob. 9.4PCh. 9 - 9.5 The pressure differential across an orifice...Ch. 9 - Show that the static sensitivity of an inclined...Ch. 9 - Prob. 9.7PCh. 9 - Show that the instrument (systematic) uncertainty...Ch. 9 - A strain gauge, diaphragm pressure transducer...Ch. 9 - Select a practical fluid to use in a manometer to...
Ch. 9 - An air pressure over the 200- to 400-N/m2 range is...Ch. 9 - Calculate the design-stage uncertainty in...Ch. 9 - The pressure drop across a valve through which air...Ch. 9 - Estimate the sensitivity (pF/mm) of a capacitance...Ch. 9 - A diaphragm pressure transducer is calibrated...Ch. 9 - A diaphragm pressure transducer is coupled with a...Ch. 9 - Prob. 9.17PCh. 9 - A 2.0 mm thick circular steel diaphragm (Em = 200...Ch. 9 - Estimate the differential pressure limit for a...Ch. 9 - The pressure fluctuations in a pipe filled with...Ch. 9 - What is the sensitivity of a pitot-static tube...Ch. 9 - A pitot-static pressure probe inserted within a...Ch. 9 - A tall pitot-static tube is mounted through and...Ch. 9 - The pressure transmission line response equation...Ch. 9 - Prob. 9.26PCh. 9 - Prob. 9.28PCh. 9 - Compare the inertance of water in a 0.2-m-long...Ch. 9 - The output from a resting healthy human adult...Ch. 9 - Prob. 9.31PCh. 9 - A pressure drop of 213 Pa is measured between two...Ch. 9 - Wall pressure taps (e.g., Figs. 9.19 and 9.21) are...Ch. 9 - Prob. 9.34PCh. 9 - Prob. 9.35PCh. 9 - Determine the resolution of a manometer required...Ch. 9 - A long cylinder is placed into a wind tunnel and...Ch. 9 - Prob. 9.38PCh. 9 - Prob. 9.39PCh. 9 - What is the sound pressure in pascals if the...Ch. 9 - A 6-mm-diameter pitot-static tube is used as a...Ch. 9 - For the thermal anemometer in Figures 9.31 and...Ch. 9 - Determine the static sensitivity of the output...Ch. 9 - A laser Doppler anemometer setup in a dual-beam...Ch. 9 - A set of 5,000 measurements of velocity at a point...Ch. 9 - Aircraft airspeed is measured using a pitot...
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- A piezometer was connected to a pipe to measure the pressure of water. The rise of water level in piezometer was 150 mm. Calculate the pressure of water. 150 mm Q A U-tube manometer is connected to a pipe for measuring the pressure of oil (Specific gravity 0.92) flowing in the pipeline. Mercury (Specific gravity 13.6) is used as manometer liquid and the difference of mercury level in the two limbs is 200 mm. The centre of pipe is 80 mm below the level of mercury in the right limb. Determine the pressure in the pipeline and the head. | 80 mm 160 mmarrow_forwardA catheter-sensor system for invasive pressure measurements has a catheter with a length of 1 m and a diameter of 2.5 mm. The catheter is filled with water at 20 C, with viscosity = 0.001 Pa.s and density = 103 kg/m3. The diaphragm elasticity Ed equals 0.5x1015 N/m5. a. Draw the simplified electrical model of the pressure measurement set-up that includes the catheter and the diaphragm and determine the transfer function of the pressure measurement system. b. Compute the natural frequency and damping ratio of this system. c. The current system has a damping ratio that is far from optimal. Suppose you are pinching the catheter for a small length lx so that the catheter diameter reduces to 0.2mm. Assuming the pinch to affect the resistance only, determine the length lx such that an optimal damping ratio = 0.7 is obtained. d. Suppose that the assumption of purely resistive effects of the pinch cannot be made. Discuss (without calculations) the consequences on the derivation of lx.arrow_forwardFig shows a U-tube differential manometer connecting two pressure pipes at A and B. Pipe A contains a liquid of specific gravity 1.5 under the pressure of 113 kN/m?. The pipe B contains oil of specific gravity 0.5 under the pressure of 202 kN/m?. Find the difference of pressure measured by mercury as fluid filling U-tube in mm. The value of x and y are 2.4 m and 1.1 m respectively. X-- Mercury The Mercury level difference ( h) in mmarrow_forward
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- 15 A single column U-tube manometer, made of glass tubing having a nominal inside diameter of 2.4 mm, has been used to measure pressure in a pipe or vessel containing air: If the limb opened to atmosphere is 10 percent oversize, find the error in mm of mercury in the measurement of air pressure due to surface tension effects. It is stated that mercury is the manometric fluid for which surface tension = 0.52 N/m and angle of contact a = 140° 16 Calculate the capillary effect in millimetres in a glass tube of 4 mm diameter, when immersed in (i) water and (ii) mercury. The temperature of the liquid is 20°C and the values of surface tension of water and mercury at 20°C in contact with air are 0.0735 N/m and 0.51 N/m respectively. The contact angle for water 0=0° and for mercury 0= 130°. Take specific weight of water at 20°C as equal to 9790 N/m³.arrow_forward(a) What are the differences among piezometer, U-tube manometer, and inverted U- tube manometer? Two U-tube manometers, one upright and the other inverted type, are connected across a water line and on oil line as shown. If h,= 5 cm, what shall h2 be? Oil (0.7) 20 сm Oil Water (0.9) 12 cm Hgarrow_forwardA U-tube manometer filled with water, density 62.4 Ibm/ft^3, shows a height difference of 10 in, what is the gauge pressure? 2.488 kPa 52.0 psf 3.537 atm 2.488 psiarrow_forward
- In the figure shown below, an open manometer is connected to a pipe to measure the pressure at A. Fluid at A is oil of s.g. oil = 0.85 , the value of (x = 334 mm) and the value of ( y = 400 mm) to obtain the pressure intensity as gauge pressure as well as absolute pressure. Take Patm = 1.01396 bar , and the manometer fluid s.g. Hg=13.6 2-Gage pressure at A (PAgage) is equal to -----------? 1-Absolute pressure at A (PAabs) is equal to -----------?both answer in kN/m^2arrow_forwardTo measure the water depth in a large open tank with opaque walls, an open vertical glass tube is attached to the side of the tank. The height of the water column in the tube is then used as a measure of the depth of water in the tank. (a) For a true water depth in the tank of 3ft, make use of the following equation (with 0 = 0-degree) to determine the percent error due to capillarity as the diameter of the glass tube is changed. Assume a water temperature of 80°F. Show your result on a graph of percent error versus tube diameter, D, in the range 0.1 in.arrow_forwardIn medical work, pressures are often measured in units of mm of H2O because body fluids, including the cerebrospinal fluid, typically have nearly the same density as water. The pressure of the cerebrospinal fluid can be measured by means of a spinal tap. A hollow tube is inserted into the spinal column, and the height to which the fluid rises is observed. If the fluid rises to a height of 160 mm, we write its gauge pressure as 160 mm H2O. a) Sometimes it is necessary to determine whether an accident victim has suffered a crushed vertebra that is blocking the flow of cerebrospinal fluid in the spinal column. In other cases, a physician may suspect that a tumor or other growth is locking the spinal column and inhibiting the flow of cerebrospinal fluid. Such conditions can be investigated by means of the Queckensted test. In this procedure the veins in the patient’s neck are compressed, to make the blood pressure rise in the brain. The increase in pressure in the blood vessels is…arrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_ios
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