CEE 3000B Exam 2 - Fall 2023

CEE 3000B: CIVIL ENGINEERING SYSTEMS EXAM 2 Fall 2023 Assigned/Due: 10/5/2023 Name: ____Elayna Pak_____________ Date: __10-5-2023_________ (1) The pavement in a new parking lot is expected to require no maintenance cost for the first 2 years of its life. After 3, the first maintenance is expected to cost $2,000 with an increase of $500 per year each year thereafter, until a scheduled resurfacing sometime after the annual maintenance is performed at the end of the 15 th year. (10 points) a. What is the total maintenance cost for the first 15 years of the life of this facility? (5 points). $65000 Excel Sheet: A3:A16 b. You must take out a loan to pay for all maintenance costs. The interest rate is 7%. Your loan principal amount is the amount calculated from part a above. Please calculate the total cost of the loan using compound interest. The period is 10 years. It compounds annually (5 points)? $127864.8 Excel Sheet: D3

Input Link A Link B Output 1 2 Name: ______________________________________ Date: __________________________________ (2) Bold true (T) or false (F) for the following statements. (10 points) (a) Models are a perfect representation of phenomena in the real world T F (b) Models must use mathematical equations T F (c) Prescriptive models help determine the best course of action. T F (d) The speed of a single vehicle on a road is a stochastic model. T F (e) We can quantify everything in a model T F (f) Models of sea level rise are stochastic T F (g) Economic efficiency can be modeled T F (h) Population growth models are descriptive T F (i) Empirical models typically do not describe the underlying mechanism of what is observed. T F (j) Environmental benefits and economic benefits can be modeled together T F (3) Please define each of the terms below (10 points). a. Value Function : A function that measures preferences over goods or services b. Decision criteria: criteria used to evaluate alternatives options c. Weighting: assigning relative weights to decision criteria based on the importance d. Scaling: a scale of measurement for decision criteria into a unitless scale e. Amalgamation: combining relative weight and value function into overall value of an alternative (4) A pipeline system made up of Links A and B in series is used to deliver water between Points 1 and 2. The probability that during any given month either of the two links fails (e.g., due to severe freezing in the winter) is 0.025. Assume that link failures are independent (5 points). a. Compute the probability that there will be no water delivered between Points 1 and 2 during a given month. i.e., What is the probability of system failure? P(A ∪ B) = (0.025)+ (0.025)-( 0.025*0.025) 0.049375 or 4.94% b. If the cost of system failure is $475,000 what is the expected monetary loss in any year? 475000*0.049375 $23453.125 2

Name: ______________________________________ Date: __________________________________ Capital cost is the initial cost of the project (one time cost), such as the materials or construction costs. However, operations and maintenance costs are recurring costs over the life of the project such as labor, reconstruction, repairs, etc. 4