CIEG 125 Introduction to Civil Engineering Fall 2005 Midterm Exam - Practice Time allowed: 50 minutes Open book, open notes No cell phones All answers and should be on these pages. Use the backs of pages if necessary, but clearly identify which question your work is associated with. GRADING SHEET – MIDTERM NAME: ________________________ Points awarded Max points Question 1. (20 points) a) b) c) d) 4 4 6 6 Question 2. (20 points) a) b) c) Magnitude Direction 5 5 5 5 Question 3. (25 points) a) Free body diagram b) Equilibrium Equations c) Forces 5 10 10 Question 4. (20 points) Response Rationale Relationship to code of ethics 5 5 10 Question 5. (15 points total) Factor 1 Factor 2 Factor 3 5 5 5 TOTAL 100QUESTION 1. (Short Answer Questions) a. What does ASCE stand for? b. What is ASCE? c. What qualifications does a Engineer-in-Training (EIT) have? d. Describe in one or two sentences a sub-discipline of civil engineering? QUESTION 2. A 10 N force is applied at 120o to the horizontal. A 5 N weight hangs vertically from the same point. The following free body diagram represents the two forces. a. Compute the horizontal and vertical components of the 10 N force. 5 N 10 N 120ob. Compute the total force in the horizontal and vertical directions for both the 10 N and 5 N forces. c. Determine the magnitude and direction of the resultant force. QUESTION 3. a) Assume the beam above is weightless. a. Draw the free body diagram for the beam. b. Write the equilibrium equations for i. The forces in the vertical direction. ii. The forces in the horizontal direction iii. Moments about the joint A. c. Compute the reactions at A and B by solving the equations in 1 a) b. Assume the beam in the above diagram is weightless. a. Draw the free body diagram for the beam A B 6 m 2 m 8 kNb. Write the equilibrium equations for i. The forces in the vertical direction. ii. The forces in the horizontal direction iii. Moments about the joint A. c. Compute the reactions at A and B by solving the equations above QUESTION 4. In the case of the improperly designed overhang, one suggested solution is for Sarah and and Joe to write a letter to Timmo stating clearly and forthrightly their concerns with the design of the overhang. Would this get Pines (Joe, Sarah and Chris) off the hook? Why or why not? Your answer should reference the ethical responsibilities of engineers.QUESTION 5. Describe three factors a bridge designer should take into account when considering what type of bridge (truss, suspension, arch etc) to use for a particular location. Explain why each factor is important. Factor 1: ______________________ Description (one sentence): Why is this factor important (one sentence)? Factor 2: ______________________ Description (one sentence): Why is this factor important (one sentence)? Factor 3: ______________________ Description (one sentence): Why is this factor important (one
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