Question 1 2 out of 2 points The solution to the LP relaxation of a maximization integer linear program provides an upper bound for the value of the objective function. Question 2 2 out of 2 points If exactly 3 projects are to be selected from a set of 5 projects, this would be written as 3 separate constraints in an integer program. Question 3 2 out of 2 points In a 01 integer programming problem involving a capital budgeting application (where xj = 1, if project j is selected, xj = 0, otherwise) the constraint x1 – x2 0 implies that if project 2 is selected, project 1 can not be selected. Question 4 2 out of 2 points If we are solving a 01 integer programming problem with three decision variables, the constraint x1 + x2 1 is a mutually exclusive constraint. Question 5 2 out of 2 points A conditional constraint specifies the conditions under which variables are integers or real variables. Question 6 2 out of 2 points Rounding noninteger solution values up to the nearest integer value will result in an infeasible solution to an integer linear programming problem. Question 7 2 out of 2 points Assume that we are using 01 integer programming model to solve a capital budgeting problem and xj = 1 if project j is selected and xj = 0, otherwise. The constraint (x1 + x2 + x3 + x4 2) means that __________ out of the 4 projects must be selected. Question 8 2 out of 2 points The Wiethoff Company has a contract to produce 10000 garden hoses for a customer. Wiethoff has 4 different machines that can produce this kind of hose. Because these machines are from different manufacturers and use differing technologies, their specifications are not the same. Write a constraint to ensure that if machine 4 is used, machine 1 will not be used. Selected Answer: Correct Y1 + Y4 1 Correct Answer: Correct Y1 + Y4 1 Question 9 2 out of 2 points You have been asked to select at least 3 out of 7 possible sites for oil exploration. Designate each site as S1, S2, S3, S4, S5, S6, and S7. The restrictions are: Restriction 1. Evaluating sites S1 and S3 will prevent you from exploring site S7. Restriction 2. Evaluating sites S2 or S4 will prevent you from assessing site S5. Restriction 3. Of all the sites, at least 3 should be assessed. Assuming that Si is a binary variable, write the constraint(s) for the second restriction Question 10 2 out of 2 points Binary variables are Question 11 2 out of 2 points You have been asked to select at least 3 out of 7 possible sites for oil exploration. Designate each site as S1, S2, S3, S4, S5, S6, and S7. The restrictions are: Restriction 1. Evaluating sites S1 and S3 will prevent you from exploring site S7. Restriction 2. Evaluating sites S2 or S4 will prevent you from assessing site S5. Restriction 3. Of all the sites, at least 3 should be assessed. Assuming that Si is a binary variable, the constraint for the first restriction is Question 12 2 out of 2 points The Wiethoff Company has a contract to produce 10000 garden hoses for a customer. Wiethoff has 4 different machines that can produce this kind of hose. Because these machines are from different manufacturers and use differing technologies, their specifications are not the same. Write the constraint that indicates they can purchase no more than 3 machines. Question 13 2 out of 2 points In a 01 integer programming model, if the constraint x1x2 = 0, it means when project 1 is selected, project 2 __________ be selected. Question 14 2 out of 2 points In a 01 integer programming model, if the constraint x1x2 0, it means when project 2 is selected, project 1 __________ be selected. Question 15 2 out of 2 points Max Z = 5×1 + 6×2 Subject to: 17×1 + 8×2 136 3×1 + 4×2 36 x1, x2 0 and integer What is the optimal solution Question 16 2 out of 2 points If we are solving a 01 integer programming problem, the constraint x1 = x2 is a __________ constraint. Question 17 2 out of 2 points In a __________ integer model, some solution values for decision variables are integers and others can be noninteger. Question 18 0 out of 2 points If we are solving a 01 integer programming problem, the constraint x1 + x2 = 1 is a __________ constraint. Question 19 2 out of 2 points Max Z = 3×1 + 5×2 Subject to: 7×1 + 12×2 136 3×1 + 5×2 36 x1, x2 0 and integer Find the optimal solution. What is the value of the objective function at the optimal solution. Note: The answer will be an integer. Please give your answer as an integer without any decimal point. For example, 25.0 (twentyfive) would be written 25 Question 20 0 out of 2 points Consider the following integer linear programming problem Max Z = 3×1 + 2×2 Subject to: 3×1 + 5×2 30 5×1 + 2×2 28 x1 8 x1 ,x2 0 and integer Find the optimal solution. What is the value of the objective function at the optimal solution. Note: The answer will be an integer. Please give your answer as an integer without any decimal point. For example, 25.0 (twentyfive) would be written 25
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