1. A precedence diagram is shown below. Solve the network for the basic scheduling information. For each activity, show the computed value of early start, early finish, late start, late finish, total float, and free float.

1. describe the effects of each of the following characteristics on polymer properties:
a) molecular weight
b) crystallinity
c)crosslinking

2. define the terms:
a) dislocation core
b)edge dislocation
c)screw dislocation

3. describe how dislocations in crystalline materials contribute to strain hardening

Provide 3 areas in Engineering Grand Challenges that are highly RELATED to Civil Engineering or Construction Engineering Management fields. Why are they associated with CECEM?

While working for a client, an engineer learns confidential knowledge of a proprietary production process being used by the client’s chemical plant. The process is clearly destructive to the environment, but the client will not listen to the objections of the engineer to release information that was gained in confidence. Is it ethical for the engineer to expose the client? Why?

Which of the following is true about hydraulic jump?

- A reduction in slope can cause a hydraulic jump

- in increase in manning's roughness can cause hydraulic jump

- An increase in slope can cause a hydraulic jump

- A smoother steeper channel will cause a hydraulic jump

- A hydraulic jump results in a reduction of total head

- A hydraulic jump results in an increase of total head

A car is traveling up a 1.5% grade at 65 mi/hr on good, wet pavement. The driver brakes to try to avoid hitting a cone on the road that is 300 ft ahead. The driver’s reaction time is 1.5 second. When the driver first applies the brakes, a software flaw causes the braking efficiency to lower to 0.8 for 100 ft. After the initial 100 ft, the braking efficiency returns to 1.0. How fast will the driver be going when the cone on the road is hit if the coefficient of rolling resistance is constant at 0.015? (Assume minimum theoretical stopping distance and ignore aerodynamic resistance.)

USING UNITED STATES IBC CHAPTER 7:

1. Roofing inter-layment shall have a minimum width of ____ inches.

A. 12                           B. 18                           C. 34                           D. 36

2. What is the minimum roof covering classification for a roof assembly on a building of Type IA construction?

A. Class A                   B. Class B                   C. Class C                   D. Non-classified

3. Roof assemblies consisting of metal sheets of shingle are considered ____ as roof assemblies.

A. A                            B. B                             C. C                             D. Special purpose

4. Double underlayment application is required beneath asphalt shingles on roofs having a maximum slope of ______.

A. 2:12                        B. 3:12                        C. 4:12                        D. 5:12

5. In areas subject to high winds, underlayment beneath asphalt shingles shall be fastened along the overlap at a maximum spacing of ____ inches.

A. 12                           B. 18                           C. 24                           D. 36

6. Define the following terms as per code:
     a. Built-up roof covering:

     b. Positive roof drainage:

     c. Scupper:

     d. Roof recover

7. List the test(s) that are used to measure the wind resistance of asphalt shingles.

8. Describe a product that meets the material requirements for wood shingles in roof

9. For built-up roofs, what test standard is used for the use of asphalt in roof?

10. Describe the code requirement in an area where there is a history of ice-forming along the eaves.

A driver is traveling 70 mi/hr on a road with a -2% downgrade. The driver’s vehicle has a braking efficiency of 90% and has anti-lock brakes. There is a stalled car on the road 500 ft ahead of the driver. The road is in good condition and is initially dry, but is wet for a 200 ft stretch just before the stalled car. What is the maximum allowable perception-reaction time of the driver such that she can still stop before hitting the stalled car? (Assume theoretical stopping distance, ignore air resistance, and let f_rl = 0.013.)

Explain concisely the physical meaning of total stress, pore water pressure and effective stress

2) What is “NFPA 704 hazard diamond”? Provide the image, and explain briefly.

An I-section joist 450 mm x 250 mm x 20 mm is used as a strut with one end fixed and the other end free carrying a buckling load of 200 × 106 N. Suggest the changes to be made in the length of the strut for a constant flexural rigidity by considering both the ends to be hinged, both the ends to be fixed and one end fixed but the other end hinged. Compare the values of the safe buckling load for all end conditions. Given modulus of elasticity of the material, E = 210 GPa and consider factor of safety = 5.
If the least radius of gyration of the column was found to be 25.96 mm, determine the values for the slenderness ratio for all four end conditions of the column. State and verify the validity of the Euler’s column theory based on the slenderness ratio for all the four end conditions.

What factors must be considered and what limitations exist for the following loops

Slinky:

Pond:

Horizontal:

Vertical: