BRIDGE CONSTRUCTION INSPECTOR

1. Next BRIDGE CONSTRUCTION INSPECTOR Practice Questions

2. 1. An 8 ft. diameter drilled shaft has a tip elevation of 197 ft. With a top elevation of 235 ft., what is the theoretical quantity of concrete for this shaft? • 29 cy • 58 cy • 71 cy • 102 cy

3. Next 1. An 8 ft. diameter drilled shaft has a tip elevation of 197 ft. With a top elevation of 235 ft., what is the theoretical quantity of concrete for this shaft? CORRECT!

4. Next 1. An 8 ft. diameter drilled shaft has a tip elevation of 197 ft. With a top elevation of 235 ft., what is the theoretical quantity of concrete for this shaft? INCORRECT! • The correct answer is “C,” 71 cy.

5. 2. Air entrained concrete is highly resistant to the destructive effects of freeze-thaw cycling due to the presence of large air bubbles in the paste. • True • False

6. Next 2. Air entrained concrete is highly resistant to the destructive effects of freeze-thaw cycling due to the presence of large air bubbles in the paste. CORRECT!

7. Next 2. Air entrained concrete is highly resistant to the destructive effects of freeze-thaw cycling due to the presence of large air bubbles in the paste. INCORRECT! • The correct answer is “False.”

8. 3. A footing is 8 ft. wide by 13 ft. long. The bottom of the footing is at elevation 211.00 and the original ground is at elevation 225.00. The finish grade of the deck is 235.00. What is the amount of structure excavation? • 54 cy • 78 cy • 92 cy • 133 cy

9. Next 3. A footing is 8 ft. wide by 13 ft. long. The bottom of the footing is at elevation 211.00 and the original ground is at elevation 225.00. The finish grade of the deck is 235.00. What is the amount of structure excavation? CORRECT!

10. Next 3. A footing is 8 ft. wide by 13 ft. long. The bottom of the footing is at elevation 211.00 and the original ground is at elevation 225.00. The finish grade of the deck is 235.00. What is the amount of structure excavation? INCORRECT! • The correct answer is “B,” 78 cy.

11. 4. The vibrator should not be used to move concrete laterally. • True • False

12. Next 4. The vibrator should not be used to move concrete laterally. CORRECT!

13. Next 4. The vibrator should not be used to move concrete laterally. INCORRECT! • The correct answer is “True.”

14. 5. During hot weather concrete placement, the inspector should • Not worry about wind as it will help to cool the concrete surface. • Assure that the curing water is as cold as possible. • Take appropriate steps to lower the mix temperature when it approaches 90°F. • Use clear/white plastic as part of the cure process.

15. Next 5. During hot weather concrete placement, the inspector should CORRECT!

16. Next 5. During hot weather concrete placement, the inspector should INCORRECT! • The correct answer is “D,” use clear/white plastic as part of the cure process.

17. 6. For footings and seals, the bottom elevation shown on the plans serves as the lower pay limit. Should the contractor over excavate below that limit or should the need arise to excavate below that limit to attain the necessary bearing value, the situation must be corrected in a manner that the construction Project Manager must approve. • True • False

18. Next 6. For footings and seals, the bottom elevation shown on the plans serves as the lower pay limit. Should the contractor over excavate below that limit or should the need arise to excavate below that limit to attain the necessary bearing value, the situation must be corrected in a manner that the construction Project Manager must approve. CORRECT!

19. Next 6. For footings and seals, the bottom elevation shown on the plans serves as the lower pay limit. Should the contractor over excavate below that limit or should the need arise to excavate below that limit to attain the necessary bearing value, the situation must be corrected in a manner that the construction Project Manager must approve. INCORRECT! • The correct answer is “True.”

20. 7. A bridge foundation must bear the weight of traffic and the considerable weight of the structure itself. Therefore, its foundation • Must be near the surface to reduce deflection. • Must start out on firm but yielding material. • Is of no particular importance in the bridge’s stability. • Relies on structural design, not mass.

21. Next 7. A bridge foundation must bear the weight of traffic and the considerable weight of the structure itself. Therefore, its foundation CORRECT!

22. Next 7. A bridge foundation must bear the weight of traffic and the considerable weight of the structure itself. Therefore, its foundation INCORRECT! • The correct answer is “D,” relies on structural design, not mass.

23. 8. When excavating inside a cofferdam, the Bridge Construction Inspector • Need not be concerned with levelness of materials encountered at the bottom of seal excavation. • Should never feel responsible for monitoring the positioning of the internal supports for the sheet pile walls. • Should arbitrarily lessen the seal depth if hard rock is encountered while excavating for the bottom of seal elevation. • None of the above.

24. Next 8. When excavating inside a cofferdam, the Bridge Construction Inspector CORRECT!

25. Next 8. When excavating inside a cofferdam, the Bridge Construction Inspector INCORRECT! • The correct answer is “D,” none of the above.

26. 9. Reinforcing steel in piers and abutments • Is critical to a bridge’s load bearing strength. • Must be closely checked for specified lap splice lengths, support and wire tie accuracy. • Must be closely checked for size, shape, length, spacing and quantity used. • All of the above.

27. Next 9. Reinforcing steel in piers and abutments CORRECT!

28. Next 9. Reinforcing steel in piers and abutments INCORRECT! • The correct answer is “D,” all of the above.

29. 10. When placing concrete as part of a bridge’s superstructure, the concrete should not be allowed to drop more than 4 feet. • True • False

30. Next 10. When placing concrete as part of a bridge’s superstructure, the concrete should not be allowed to drop more than 4 feet. CORRECT!

31. Next 10. When placing concrete as part of a bridge’s superstructure, the concrete should not be allowed to drop more than 4 feet. INCORRECT! • The correct answer is “False.”

32. 11. A ½ inch High Strength Bolt that is 4 inches long and installed perpendicular to the connection has a turn requirement in the Rotational Capacity Test of • 1/3 turn • 1/2 turn • 2/3 turn • 1 full turn

33. Next 11. A ½ inch High Strength Bolt that is 4 inches long and installed perpendicular to the connection has a turn requirement in the Rotational Capacity Test of CORRECT!

34. Next 11. A ½ inch High Strength Bolt that is 4 inches long and installed perpendicular to the connection has a turn requirement in the Rotational Capacity Test of INCORRECT! • The correct answer is “B,” 1/2 turn.

35. 12. The granular wall backfill under an impact panel should be placed in ______ lifts. • 6” • 12” • 18” • None of the above

36. Next 12. The granular wall backfill under an impact panel should be placed in ______ lifts. CORRECT!

37. Next 12. The granular wall backfill under an impact panel should be placed in ______ lifts. INCORRECT! • The correct answer is “D,” none of the above.

38. 13. Your bridge has precast bulb-I girders with a camber of 2½” and the deck and rail deadload together has a deflection of 2”. The top flange of the bulb-I girders is a total of 2 feet wide and your superelvation is 0.04 ft/ft. With a minimum buildup required across the entire girder of 1”, then the total buildup at the ends of the beams at the girder centerline will be ______. • 2” • 2½” • 3½” • 4½”

39. Next 13. Your bridge has precast bulb-I girders with a camber of 2½” and the deck and rail deadload together has a deflection of 2”. The top flange of the bulb-I girders is a total of 2 feet wide and your superelvation is 0.04 ft/ft. With a minimum buildup required across the entire girder of 1”, then the total buildup at the ends of the beams at the girder centerline will be ______. 2” CORRECT!

40. Next 13. Your bridge has precast bulb-I girders with a camber of 2½” and the deck and rail deadload together has a deflection of 2”. The top flange of the bulb-I girders is a total of 2 feet wide and your superelvation is 0.04 ft/ft. With a minimum buildup required across the entire girder of 1”, then the total buildup at the ends of the beams at the girder centerline will be ______. INCORRECT! • The correct answer is “A,” 2 inches.

41. 14. You have a 6 ft. diameter drilled shaft with a clearance of 3” from the reinforcement cage to the side of the shaft. How many spacers are required at each interval around the drilled shaft reinforcement cage? • 5 • 6 • 7 • 9

42. Next 14. You have a 6 ft. diameter drilled shaft with a clearance of 3” from the reinforcement cage to the side of the shaft. How many spacers are required at each interval around the drilled shaft reinforcement cage? CORRECT!

43. Next 14. You have a 6 ft. diameter drilled shaft with a clearance of 3” from the reinforcement cage to the side of the shaft. How many spacers are required at each interval around the drilled shaft reinforcement cage? INCORRECT! • The correct answer is “C,” 7.

44. 15. You have a post-tensioned box girder bridge that will have the tendons tensioned from both ends. Given the following elongation amounts, what is the % of elongation per tendon? • 103.4% • 107.3% 109.4% 121.5%

45. Next 15. You have a post-tensioned box girder bridge that will have the tendons tensioned from both ends. Given the following elongation amounts, what is the % of elongation per tendon? CORRECT!

46. Next 15. You have a post-tensioned box girder bridge that will have the tendons tensioned from both ends. Given the following elongation amounts, what is the % of elongation per tendon? INCORRECT! • The correct answer is “C,” 109.4%.