Question 41. The average grain size of the bed material is 0.16 mm for medium silt, Lacey’s silt factor is likely to be _______

Question 42. The waterway for a bridge on the river in alluvial plain having a dominant discharge of 3600 cumecs should be ________ m.

Question 43. Greater is the afflux, lesser will be the available clearance for the same deck level.

Question 44. Greater is the reduction in the linear waterway, the lesser is the afflux.

Question 45. The proposed masonry arch bridge having the total height of its abutments or piers from top to bottom as H can be proposed to have economical spans each equal to ______

Question 46. Which of the following component of a buttress dam is also called counterfort?

Question 47. Which of the following is the earliest recorded multiple arch buttress dam?

Question 48. Which of the following type of dam requires very strong and stable foundations and is not in use as much as the other types?

Question 49. The buttresses of a free deck buttress dam are provided at ‘x’ m clear spacing and buttress thickness is proposed to be ‘t’ m. The buttress section can then be designed like the section of a concrete gravity dam by considering the effective unit weight of water = Surcharge factor (S) x actual unit weight of water. The value of this surcharge factor is given as _____________

Question 50. In a simple deck slab buttress dam of a given height, the buttress spacing can be increased by increasing the upstream slope.