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exam1writtens07_solution

# exam1writtens07_solution - Name_Solution-Ohland and Nyquist...

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Name: ___ Solution—Ohland and Nyquist ________ Problem #1 (4 points) Ajay is a practicing mechanical engineer with expertise in heating, ventilation, and air conditioning (HVAC) systems. During a large project, he is asked by a General Contractor to provide his opinion on the structural system needed to support a rooftop air conditioning unit. Which of the Fundamental Canons of the Code of Ethics for Engineers will have the greatest bearing on Ajay’s response? Perform services only in area of their competence Hold paramount the public welfare OR Conduct themselves responsibly Problem #2 (4 points) List the first four stages of a team’s development, and one important characteristic of each stage. Forming – orientation, tentative, polite, concern, self-discourse, Storming – criticism, conflict, poor attendance, hostility, polarization, coalition forming Norming – cohesion, agreement, role definition, revise Code of Cooperation, more “we” Performing – productivity, decision making, problem solving, cooperation, task orientation Problem #3 (6 points) For each problem scenario below, identify the team member role that would be responsible for fixing the problem. A. Patricia, one of the team members, was never notified of the location of a team meeting Meeting Coordinator B. Xiao-Wei, one of the team members, never says anything in team meetings Encourager / Gatekeeper C. The team always proceeds with the first idea presented without considering alternatives Devil’s Advocate 3

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Name: ___ Solution—Ohland and Nyquist ________ Problem # 4 (6 points) The displacement of a spring under an applied force (F) is related to the stiffness of the spring (K) by the equation = K F . The stiffness of a spring is itself a function of its shear modulus (G), the number of coils (N), and geometric properties D and d. N D d G K 3 4 8 = Complete the MATLAB code below so that the spring stiffness is calculated for a series of wire diameters, number of coils, and specific set of coil diameters. G = 1e8 % Shear modulus in Pascals d = [0.08 0.08 0.1 0.1 0.12 0.12 0.15 0.15]% Wire diameters (m) D = [0.50 0.75 0.5 .75 0.50 0.75 0.50 0.75]% Coil diameters (m) N = [ 5 5 5 5 4 4 4 4 ]% number of coils K = G*d.^4./(8*D.^3.*N) Problem #5 (4 points) What matrix V displays after running this script?
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