Dams and Spillways
91. Hydraulic head for a small dam is:
a. 7.5 – 12 m
b. 12 – 13 m
c. 5 – 10 m
d. 12 – 40 m
92. Earth dams are in shape.
a. Rectangular
b. Triangular
c. Trapezoidal
d. Circular
93. Based on material of construction, types are there.
a. 2
b. 3
c. 4
d. 5
94. is a temporary dam constructed to exclude water from a specific area.
a. Storage dam
b. Coffer dam
c. Diversion dam
d. None of above
95. Buttress dams are of types.
a. 6
b. 5
c. 3
d. 4
96. The link between two processes P and Q to send and receive messages is called
a. process link
b. Message passing link
c. Synchronization link
d. Communication link
97. Arch-gravity dams are thinner dams and save resources.
a. False
b. True
98. Which of the following is a secondary safety arrangement?
a. Subsidiary spillway
b. Safety valves
c. Spillway gates
d. none
99. If the upstream face of the spillway is kept vertical, the crest shape should also confirm to the lower nappe of an inclined sharp-crested weir.
a. False
b. True
100. The spillway can be best built independently of the dam when there is
a. Deep wide gorge with gradual slopes
b. Deep narrow gorge with gradual slopes
c. Deep wide gorge with steep slopes
d. Deep narrow gorge with steep slopes
101. Which of the following is the simplest type of spillway and may be constructed on small bunds or thin arch dams?
a. Siphon spillway
b. Shaft spillway
c. Ogee spillway
d. Straight drop spillway
102. An ungated spillway starts functioning as soon as the water level in the reservoir crosses the
a. Maximum conservation level
b. Minimum conversion level
c. Minimum conservation level
d. Maximum conversion level
103. The safety valve of a dam is its
a. All of above
b. Inspection gallery
c. Outlet sluices
d. Spillway
104. The theoretical profile obtained for the lower nappe of a free-falling jet is known as Bazin’s profile. Theoretically, this profile causes no negative pressure on the crest under the designed head. But in practice, negative pressure on such a profile seems inevitable.
a. True
b. False
105. What is the satisfactory radius for the reverse bottom curve which is provided at the downstream end of the spillway?
a. one-third of the spillway height
b. one-fourth of the spillway height
c. Half of the spillway height
d. None of the above
106. The spillway which can be called as an overflow spillway is essentially _
a. A chute spillway
b. A shaft spillway
c. An ogee spillway
d. None
107. Which of the following spillway is an improvement over free overflow spillway?
a. Siphon spillway
b. Overflow spillway
c. Open channel spillway
d. Straight drop spillway
108. Which of the following spillway is least suitable to earthen dams?
a. Shaft spillway
b. Chute spillway
c. Ogee spillway
d. Side channel spillway
109. If the operating head on an ogee spillway is more than the design head then
a. the pressure on the crest will be positive
b. the pressure on the crest will be zero
c. the pressure on the crest will be negative causing cavitation
d. None of above
110. In the functioning of an ogee spillway, the operating head
a. never exceeds the design head
b. frequently exceeds the design head
c. rarely exceeds the design head
d. None of above
111. The profile for an Ogee spillway having a vertical upstream face can be determined on the basis of its WES profile. The upstream profile extends up to x = -1.27 Hd Where Hd is the design head.
a. True
b. False
112. Which of the following plot is useful in determining the clearance for the spillway deck bridge and the top levels of walls on the side of the spillway?
a. Both the coordinates of upper and lower nappe
b. The coordinates of the upper nappe
c. The coordinates of the lower nappe
d. The origin or apex of crest
113. If the head of water over the spillway is less than the design head, the falling jet would adhere to the crest of the ogee spillway. This causes positive hydrostatic pressure and thereby reduces the discharge coefficient of the weir.
a. False
b. True
114. Jawa Dam is in Jordan. It is 100 kms northeast of capital Amman. It is a gravity dam with stone wall. It is dated to 3000 BC.
a. True
b. False
115. Portion of dam in contact with ground at downstream side is
a. Toe
b. Heel
c. Foot
d. Crest
116. Based on function of dam, it can be classified into: –
a. 8
b. 5
c. 10
d. 14
117. Which of the below is an example for earth dam?
a. Idukki dam
b. Bhakra nangal dam
c. Banasura sugar dam
d. Bisalpur dam
118. is the arrangement made near top of dam for passage of excess water from the reservoir.
a. Spillway
b. Sluice way
c. Gallery
d. None of above
119. Hydroelectric power plants at dam supplies about of world’s electricity.
a. 20%
b. 19%
c. 30%
d. 22%
120. Natural dam is not created usually by:
a. Moraine deposit
b. Volcanic activity
c. Glacial activity
d. River meandering
0 Comments