WorksheetsDay 55-Nov 16-Worksheet-Diploma-Reservoirs
Total questions: 15
Worksheet time: 12mins
A large artificial lake created by constructing a dam across a river is called —
(a)
The amount of water that can be supplied from a reservoir in a specified interval of time is called —
Average yield
Safe yield
Catchment yield
Reservoir yield
The volume of water stored between normal reservoir level and maximum reservoir level is —
(a)
The difference in level between the top of the dam and maximum water level is known as —
(a)
The useful life of a reservoir ends when its capacity is reduced to —
10% of design capacity
20% of design capacity
30%
50%
The water stored in the pervious formations of the river banks and soil above it is called —
(a)
TRUE/FALSE: A detention reservoir is provided without any gates or control structures.
True
False
ASSERTION–REASON: Assertion (A): Freeboard is provided in a dam to prevent overtopping during floods. Reason (R): Freeboard is the vertical distance between the top of dam and maximum water level (MWL). Choose the correct option:
Both A and R true and R explains A
Both A and R true but R does not explain A
A true, R false
A false, R true
Reservoirs which serve only one purpose are called (a) .
A reservoir constructed to store water during the period of excess flow is known as (a) .
The highest level up to which water is normally stored in a reservoir is called (a) .
The difference between the top of dam and Full Reservoir Level is called (a) .
Statement-Type: Consider the following statements regarding Retarding Reservoirs: (i) They are not fitted with control gates or valves. (ii) They are preferred on small rivers. (iii) They cannot be used for flood control. Which of the above are correct?
(i) and (ii) only
(ii) and (iii) only
(i) and (iii) only
(i), (ii) and (iii)
The level corresponding to the invert of the lowest sluice in a dam is called (a) .
ASSERTION–REASON: Assertion (A): Useful life of a reservoir increase with increased sedimentation. Reason (R): Sediment deposition reduces the effective storage capacity of the reservoir. Choose the correct option:
Both A and R true and R correctly explains A
Both A and R true but R does not explain A
A true, R false
A false, R true
