Question 1. Question 2. 1 / 1 pts. An engineer must design a control panel for a wind turbine, given the following guidelines:

Transcription

1 Question 1 An engineer must design a control panel for a wind turbine, given the following guidelines: Two warning lamps (L1 & L2) turn on when the turbine speed exceeds 5000 rpm (S1) If the current through either lamp is stopped (lamp burns out) the other lamp must still be able to illuminate The total current must not exceed 0.50 A Which design satisfies all of the engineer s design criteria? Question 2 Three students are designing a winch system. As part of the design process they find existing solutions, and identify why the solutions are not adequate or appropriate. Which step of the design process are the students completing? Research and define the problem

2 Evaluate the solution Develop a solution Present testing results Question 3 A design team completed the above decision matrix to evaluate their ideas. Which idea should the team pick as a solution based solely on the decision matrix? Idea #2, since it has the lowest cost Idea #6, since it ranks highest on the decision matrix summary Idea #4, since it has the least complex idea Idea #3, since it has the highest decision matrix total Question 4

3 What type of simple machine is the shovel? Class 2 lever Class 1 lever Class 3 lever Question 5 Which resource is a form of renewable energy? Uranium Natural Gas Biomass Coal Question 6 Which ammeter will display the highest current?

4 Question 7 A team of engineers has been assembled to design and create a renewable electrical energy generating and distribution system that utilizes wind, solar-electric, and fuel-cell energy conversion systems. The team just finished creating a decision matrix to compare the attributes of the various ideas. Which step from the design process is now occurring? Develop a solution Evaluate solution Construct and test prototype Generate concepts Question 8 A 12 oz can of soda was left in a car on a hot day. In the morning, the soda temperature was 60 F with a gauge pressure of 40 psi. What will the gauge pressure be when the soda reaches 90 F (or 305 Kelvin)? 60.0 psi

5 57.9 psi 43.2 psi 42.3 psi Question 9 Use the image below to answer the question. A pneumatic system consists of several identical 1.5 inch diameter cylinders to lift 450-pound pallets in a warehouse. The gauge pressure in the system reservoir remains at 75 psi, and the atmospheric pressure is 14.7 psi. Assuming that the weight of the pistons is negligible, determine the total number of 1.5-inch cylinders needed in the pneumatic system to lift the 450- pound load Question 10 Use the image below to answer the question.

6 A bicycle pump is used to inflate a bicycle tire. When the pump is connected to the tire, the volume of the pump-tire system is 56 in 3 and the gauge pressure is 65 lb/in 2. The pump is given one stroke, and the volume of the pump-tire system is now 50 in 3. Atmospheric pressure is 14.7 lb/in 2 and the temperature of the pump and tire remains constant at 68?F. What is the gauge pressure after the initial stroke of the bicycle pump? lb/in lb/in lb/in lb/in. 2 Question 11 Below are two examples of programs that have the same output when controlling a green and a blue LED. Analyze either of the programs to answer the following question. How long will the blue LED be on?

7 8 seconds 2 seconds 7 seconds 6 seconds Question 12 Which point on the stress-strain curve is located in the elastic region? Point A Point D Point C Point B Question 13 Use the image below to answer the question.

8 Which diagram has the direction of the reaction forces correctly labeled, assuming all force magnitudes are correct in the given options?

9 Question 14 Use the image below to answer the question. Which manufacturing process was most likely used to create the water bottle? Molding Casting

10 Turning Milling Question 15 A team of students designed a marble sorter to separate a total of 20 marbles into bins. (6 black, 6 blue, and 8 clear) into individual bins. After multiple trials, the students found that the percentage of each color that sorted correctly was as follows: 83% black, 67% blue, and 88% clear. Given the trial results, what is the theoretical probability that all 20 marbles will be dropped into their corresponding bins during the next run? 62% 1% 10% 48% Quiz Score: 15 out of 15