Which of the following erosion protection materials is manufactured with a layer of material between two layers of netting?

a. rip-rap
b. silt fence
c. hydromulch
d. erosion mats or erosion control blankets


d. erosion mats or erosion control blankets

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The density of water vapor in air changes rapidly with the change in air temperature. Data were recorded from an experimental test and are shown in the following table:

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What is the current across the MSB "rung" of a 4-bit R/2R Ladder DAC if the reference voltage is 6 V and R is 10 k??

A) 300 ?A B) 400 ?A C) 360 ?A D) 600 ?A

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Nominal dimensions refer to the size of the material before drying

Indicate whether the statement is true or false

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The following data are for a company that produces washers and dryers.

• Dryers retail for $198 and contribute $15 to profit. • Washers retail for $499.95 and contribute $45 for profit. • The washer blade is limited in production capacity to 50 blades, while all other components have no limits. • Chassis assembly requires 6 person-hours for each dryer set and 18 person-hours for each washer. The plant employs 225 workers for an 8-hour shift to perform chassis assembly operations. • A dryer requires 1 person-hour on the assembly line, a washer requires 1.6 personhours. There are 30 people on a single 8-hour shift assigned to assembly. • Final inspection requires 0.5 person-hour for a dryer and 2.0 person-hours for a washer. The plant employs 20 full-time inspectors and one part-time employee for 2 hours per day. a. Write a linear programming model. b. What is the optimum number of dryers and washers? c. Calculate the maximum profit. d. The linear-programming and break-even approaches are used to find the selling price for both the dryer and the washer, based on $10,000 fixed cost for both dryer and washer with a variable cost of $160 for the dryer and $330 for the washer. Determine how many days will be required until the company starts making a profit for the washers and the dryers. Use $198 and $500 as selling prices for the dryer and the washer, respectively.

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