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Engineering

Describe the steps involved in accomplishing a life-cycle cost analysis (LCCA). I have listed the steps. just describe. a) - Operational Performance. b) - Salvage externalities c) - Value vs. Risk d) - Initial expenditure e) - Maintenance implications

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Engineering

Give five general principles involved in the process of sewage filtration?

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Engineering

A ventilation duct must convey 2 000 m of air per hour. The cross section of the duct is rectangular, 1 000 mm x 500. Determine the average air velocity as well as the mass flos rate if the air density is 1,2 kg/m3

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Engineering

Are front-end engineers starting to decline in China?

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Engineering

Which of the following tape measure techniques can be used to achieve accurate measurements? Choose all that apply.

a) Pull

b) Vertical-Bottom UP

c) Push

d) Push and Bend

e) Vertical Top Down

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Engineering

A cylindrical bar of metal having a diameter of 20.9 mm and a length of 205 mm is deformed elastically in tension with a force of 45200 N. Given that the elastic modulus and Poisson's ratio of the metal are 68.8 GPa and 0.32, respectively, determine the following: (a) The amount by which this specimen will elongate in the direction of the applied stress. (b) The change in diameter of the specimen. Indicate an increase in diameter with a positive number and a decrease with a negative number.

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Engineering

An online identity is different and separate from an online profile

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Engineering

To reduce the drag coefficient and thus improve the fuel efficiency of cars, the design of side rearview mirrors has changed dramatically in recent decades from asimple circular plate to a streamlined shape. Determine the amount of fuel and moneysaved per year as a result of replacing a 15-cm-diameter flat mirror by one with ahemispherical back. Assume the car is driven 25,000 km a year at an average speedof 95 km/hr. Take the density and price of gasoline to be 0.75 kg/L and $0.90/L, respectively; the heating value of gasoline to be 44,000 kJ/kg and the overall efficiencyof the engine to be 30 percent.

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Engineering

Ben is surveying a plot to build a road 5 km long. how many meters long will the road be?

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Engineering

3. Which of the following statements is correct?

A. Three-way switches are wired internally.

B. Three-way switches have two common terminals.

C. Four-way switches have the word "ON" engraved on their handles

D. Four-way switches contain internal wiring.

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Engineering

A water pump delivers 6 hp of shaft power when operating. The pressure differential between the outlet and the inlet of the pump is measured to be 1.2 psi when the flow rate is 10 ft3/s, and the velocity changes to 5 ft/s from 2 ft/s as the water passes through the pump. Determine the mechanical efficiency of this pump assuming the water density to be 62.4 lbm/ft3 (written in decimal form with 3 significant figures).

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Engineering

For flow over a plate, the variation of velocity with vertical distance y from the plate is given as u (y) = ay - by2 where a and b are constants. Choose the correct relation for the wall shear stress in terms of a, b, and μ.

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Engineering

Write an expression for the output voltage of an AC source that has an amplitude of 19 V and a frequency of 240 Hz. (Use the following as necessary: t. Assume V is in volts and t is in seconds. Do not include units in your answer. Assume V

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Engineering

A small object A is held against the vertical side of the rotating cylindrical container of radius r by centrifugal action. If the coefficient of static friction between the object and the container is μs, determine the expression for the minimum rotational rate ⋅ θ = ω θ·=ω of the container which will keep the object from slipping down the vertical side.

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Engineering

Consider a vortex filament of strength in the shape of a closed circular loop of radius R. Obtain an expression for the velocity induced at the center of the loop in terms of T and R

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