Step-by-Step Engineering Tutorials for Easy Learning

Explain why the external equalizer line on a thermostatic expansion valve should always be installed after downstream of the thermal bulb?
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C)a relative large plate of a glass is subjected to a tensile of 50 mpa. if the specific surface energy and modulus of elasticity for this glass are 0.4 j/m2 and 72 gpa, respectively, determine the maximum length of a surface crack that is possible without fracture.
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If a radiator in a steam heating system is cool while the others are hot because its valve is closed, it means the?
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this paper provides a comprehensive review of literature, mostly of the last 1015 years, on modeling of machining of composite materials with a focus on the process of turning. the paper discusses modeling of both fiber reinforced and particle reinforced composites. modeling studies include molecular dynamic simulations, 2-d and 3-d finite element models and the emerging field of multi- scale models. in fiber reinforced composites the focus is on glass and carbon fiber reinforced polymeric composites as well as long fiber reinforced metal matrix composites. on the other hand modeling of particulate composites is restricted to that of metal matrix composites (mmc). the paper includes recent modeling work to predict cutting forces, toolparticle interaction, cutting temperatures and machined sub-surface damage. a case study on the machining of the mmc a359 aluminum matrix composite reinforced with 20% by volume fraction silicon carbide particles is included to showcase the hierarchical multi-scale machining model
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a digital output voltmeter has an input range of 0 to 30 v and displays three significant figures xx.x. the manufacturer claims an accuracy of of full scale. with a voltage reading of 5 v, what are the percent uncertainties of the reading due to accuracy and resolution
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Determine the maximum tensile axial force in member DJ due to the series of three moving concentrated loads.
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S= 800m2 distance between pipe support is 1m manpower is 10 how many day to install all pipe supports?
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consider a mach 3 flow at 1 atm pressure initially moving over a flat horizontal surface. the flow then encounters a 20 degree expansion corner, followed by a 20 degree compression corner that turns the flow back to the horizontal. calculate the pressure of the flow downstream of the compression corner. note: you will find that the pressure downstream of the compression corner is different from the pressure upstream of the expansion corner, even though the upstream and downstream flows are in the same direction, namely horizontal. why?
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Consider a plate whose top surface is being cooled by air where as the bottom surface is exposed to a hot stream at 200C with a convection heat transfer coefficient of 35 W/m^2.K. The air thermal conductivity is 0.243 W/m.K whereas the thermal conductivity of the plate is about 237 W/m.K. If the bottom surface of the plate 150C. Required:Determine the temperature gradient in the air and the temperature gradient in the plate at the top surface of the plate.
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chegg consider the following two signals: ( 1 )n+ i xj [n] = 2 u[n + 1], ( 1 )n x2[n] = 4 u[n]. let x 1 (z) and x1 (z) respectively be the unilateral and bilateral z-transforms of x 1 [n], and let x2(z) and x2(z) respectively be the unilateral and bilateral z?transforms of x2 [ n].
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the water in a tank is pressurized by air, and the pressure is measured by a multifluid manometer as shown. determine the gage pressure of air in the tank if h1
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this material is rolled from 100 mm to 70 mm thick, fully annealed, rolled to 60 mm and then rolled to 38 mm thick. assume constant width. what is the %cw in the material?
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a concrete retaining wall whose total volume will be 735 cy is to be constructed by using job-mixed concrete containing the following quantities per cubic yard, based on surface-dry sand and gravel
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what function does the heater core serve
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factors such as the material quality and condition of the building, the condition of the foundation, roof and gutters, and the type of chimney are part of the: multiple choice question.
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Suppose we could take the system of (Figure 1) and divide it into an arbitrary number of pipeline stages k, each having a delay of 300/k, and with each pipeline register having a delay of 20 ps.
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A(n) ______________________________ switch is used in factory environments as an emergency or contact switch when a worker is using both hands for assembling a product.
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Technician a says main bearings can be measured with an inside micrometer. technician b says main bearings can be measured with a bore gauge. who is correct?
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a gas turbine exhausts combustion products at 540oc with the following composition (by weight): o2, 17%; h2o, 4%; n2, 79%. these products are to be mixed with air (25 oc, 1 atm), and the resulting gas mixture will be used as the oxidizer in a natural-gas-fired boiler. the mixture must be at t
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The desired amplitude response A(f) of a filter is shown below as a function of frequency f. Design an FIR filter that provides the desired amplitude response using frequency sampling design. The sampling rate is fsampling
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At room temperature (20oC) a 0.5-mm gap exists between the ends of the rods shown. At a later time when the temperature has reached 140oC, determine (a) the normal stress in aluminum rod (b) the change in length of the aluminum rod.
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Find the resultant force and couple at point A for the force system applied to the truss structure shown in the figure. Also find the y intercept of the resultant force R if treated as a single vector.
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Theoretical analysis of marxist-leninist political economy on the role of some market participants
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technician a says on some vehicles the fuel pressure is monitored by a fuel rail pressure sensor and the output of the fuel pump is controlled by the pcm through pulse-width modulation. technician b says all fuel pumps on late-model vehicles are controlled by the pcm according to inputs received on the can bus and other specific sensors.who is correct?
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