Guillermo_Morales1.3

As an instrumentation engineer you are asked to measure pressure with accuracy rate of±0.1%, what does it imply?If the pressure actual readings are 2, 4, 5 kg/m2in the full scale division of 10 kg/m2then whatare the possible measured values of pressure if accuracy rate of instrument is ±0.1% FSD ?State your answer with justification for the following whether it is accurate and precise,accurate not precise, precise but not accurate and not accurate and not precise.

The transducer specified in Table 1.1 is chosen to measurea nominal pressure of 500 cm H2O. The ambient temperature is expected to vary between 18 ∘C and 25 ∘C duringtests. Estimate the possible range (magnitude) of each listedelemental error affecting the measured pressure refering to the solution provided online, Sensitivity error(eK) = (±0.0025)(500 cm H2O)= ± 0.75 cm H2O = ± 0.00375 V how do you get 0.75?? shoud it not be 1.25?   according the answer, for sensitivity

Question 7

Find the pressure reading for all Pressure Indicators, P11, P12, P13, and P14? A = 125 cm, B = 2 cm, C = 5 cm, D = 10 cm E = 8 cm, F = 2 cm, G = 5 cm, S.G. = 0.92 Blank #1: PI1 = Blank #2: P12 = Blank #3: PI3 = Blank #4: P14 = LIQUID LEVEL D cmWC cmWC cmWC cmWC TOP13 G P14 O P12 E LLOPII

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A force measurement system (weight scale) has the following specifications as shown in Table 1: Estimate the overall instrument uncertainty for this system based on available information. FSO refers to full-scale operating range.

The transducer specified in Table 1.1 is chosen to measurea nominal pressure of 500 cm H2O. The ambient temperature is expected to vary between 18 ∘C and 25 ∘C duringtests. Estimate the possible range (magnitude) of each listedelemental error affecting the measured pressure.   How do I calculate the sensitivity error?  The solution that was given: Sensitivity error(eK) = (±0.0025)(500 cm H2O)= ± 0.75 cm H2O = ± 0.00375 V   My Question is, how do you obtain 0.75 since 0.0025 x 500 gives 1.25!   please help. thanks

Q.1 a. Repeatability and reproducibility are ways of measuring precision, particularly in the field of engineering. i. What is an engineer's expectation when performing repeatability or reproducibility? ii. State a difference between repeatability and reproducibility in an experiment? b. Figure Q.1 shows the measurement data of two types of thermal transducers namely thermocouple. Турe E Туре К 6.8 4.2 20 40 60 80 100 Temperature Difference (°C) Voltage Output (mV)

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A temperature measurement system has the following specifications: -128 to 781°C Range Linearity error 0.29% FSO Hysteresis error 0.12% FSO Sensitivity error 0.04% FSO Zero drift 0.32% FSO FSO stands for "Full Scale Output". Estimate the overall instrument uncertainty for this system based on the available information. Use the maximum possible output range over the FSO in your computations.

A Pitot tube measures a pressure difference Pa = Pt- Ps (dynamic = total - static) between the front and side of the Pitot tube. The dynamic pressure is given by the kinetic energy due to the airspeed v, allowing airspeed to be calculated from the measured pressure difference. (a) P₁ = ² pv² ⇒ v= When designing a Pitot tube, a manufacturer wants to make it precise enough to measure airspeed to within 0.5 % uncertainty, i.e. = 0.005, at sea level. Av p=(1.225 +0.0005) kg/m³ at sea level. (b) 2Pd Av Using error propagation, derive an expression for Simplify as much as possible! ΔΡΑ Pd Calculate the maximum permissible %-uncertainty in Pa, i.e. allow the Pitot tube to meet the manufacturer's requirements. Hint: Answer 1% x 100, that will

Task of mechanical engineering

1.The thickness of a gage block is measured five times using an instrument that has a resolution of 0.001 cm. The following measurements are obtained (in cm): 1.100, 1.110, 1.090, 1.095, and 1.105. The true gauge block thickness is known to be 1.050 cm. Use this information to answer the following questions: a. What errors or sources of measurement error can be identified in the example? (Hint: there are three). Identify each one as a random or systematic uncertainty. b. Estimate the magnitudes of each of these uncertainties. Wherever possible, estimate random uncertainties at a 95% probability/confidence level. c. Based on the uncertainties determined in part b, estimate the overall uncertainty of a measurement obtained by this instrument.

A thermostat control with dial markings from 0 to 100 is used to regulate the temperature of an oil bath. A calibration plot on logarithmic coordinates of the temperature, T (°F), versus the dial setting, R, is a straight line that passes through the points (R1 = 20.0, Ti =110.0 °F) and (R2 = 40.0, T2 = 250.0 °F). (a) Derive an equation for T (°F) in terms of R. (b) Estimate the thermostat setting needed to obtain a temperature of 320°F.

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CHAPTER 5 : DIESEL ENGINE POWER PLANT A six cylinder, four-stroke CI engine is tested against a water brake dynamometer for which B.P = WN/17x10' in kW, where W is the brake load in newton and N is the speed of the engine in the r.p.m. The air consumption was measured by means of a sharp edged orifice. During the test following observersations were taken : • Bore • Stroke • Speed • Brake load Barometer reading = 10 cm = 14 cm = 2500 rpm = 480 N = 76 cm Hg • Orifice diameter • Co-efficient of discharge of orifice • Pressure drop across orifice • Room temperature Fuel Consumption = 3.3 cm = 0.62 = 14 cm of Hg = 25°C = 0.32 kg/min Calculate following : i. The volumetric efficiency The brake mean effective pressure ( b.m.e.p) The engine torque The brake specific fuel consumption ( b.s.f.c ) ii. iv.

Find visocisity of whole blood @ 37oC