Water Resources Engineering and Hydrology (3160610) MCQs

MCQs of Ground water

Showing 1 to 10 out of 56 Questions
1 2 3 4 5 6
1.

Storage coefficient of a compressible confined aquifer is a function of

(a)

transmissibility of aquifer and specific yield of aquifer.
(b)

transmissibility of the aquifer and compressibility of water.
(c)

permeability, thickness and compressibility of aquifer and compressibility of water
(d)

specific weight of water, thickness of the aquifer, compressibility of the aquifer and that of water
Answer:

Option (d)

2.

What are the daily flow capacity (m3/day) and the transmissivity (m2/day) of a sand
stone aquifer if:
The aquifer height is 15 m
The aquifer width is 800 m
The aquifer length is 2 km
The head change over the length of 2 km is 3 m
Hydraulic conductivity is 6 × 10–7 m/s.

(a)

0.84 and 0.78
(b)

0.88 and 0.68
(c)

0.94 and 0.78
(d)

0.94 and 0.68
Answer:

Option (c)

3.

Water table of an aquifer drops by 125 cm over an area of 100 km2. The porosity and specific retention of the aquifer material are 30% and 7.5%, respectively. The amount of water drained out from the area is _____________ km3.

(a)

0.028
(b)

0.026
(c)

0.030
(d)

0.016
Answer:

Option (a)

4.

A well of diameter 25 cm fully penetrates a confined aquifer. After a long period of pumping at a rate of 55 l/sec, the observations of drawdown taken at 12 m and 120 m distances from the centre of the well are found to be 3.5 m and 0.75 m respectively. The transmissivity of the aquifer is ____________ m2/day.

(a)

633.5
(b)

623.5
(c)

600
(d)

none of above
Answer:

Option (a)

5.

The yield of poen well depends upon

(a)

permeability of a soil
(b)

area of aquifer opening into the wells
(c)

actual flow velocity
(d)

all of the above
Answer:

Option (d)

6.

match list using code following:

list 1                       list 2

A.Fine gravel           1. 1 to 10

B.Very fine sand      2. 0.1 to 0.01

C. Silt                       3.100 to 1000

D. Pure clay             4. 10-5  to 10-6

 

(a)

A-1 B-3 C-4 D-2
(b)

A-1 B-3 C-2 D-4
(c)

A-3 B-1 C-4 D-2
(d)

A-3 B-1 C-2 D-4
Answer:

Option (d)

7.

A commonly use hand pump is the

(a)

Centrifugal Pump
(b)

Reciprocating Pump
(c)

Rotary Pump
(d)

Axial flow Pump
Answer:

Option (b)

8.

In a flow-mass curve study, the demand line draw from a ridge does not intersect the mass curve again.This implies that

(a)

the reservoir is not full at the begining
(b)

the storage is not adequate
(c)

the demand cannot be met by the inflow as the resrvoir will not refill
(d)

the reservoir is wasting water by spill
Answer:

Option (c)

9.

match list 1 and list 2 with following

list 1                                  list 2

A.Specicific Yied             1. Volume of water retained per unit volume of aquifer

B. Specific capacity         2. Volume of water drained drained by graivity per unit volume of aqufer

C. Specific retention       3. Difference of porosity and Specific Storage

D. Specific Sotarage       4. Well yield per unit drawdown

                                         5. Volume of water water unit  relesed from unit volume of aquifer for unit decline in piezometrichead

(a)

A-2 B-4 C-1 D-5
(b)

A-4 B-2 C-3 D-5
(c)

A-2 B-5 C-1 D-4
(d)

A-4 B-2 C-3 D-1
Answer:

Option (a)

10.

Water present in an artesian aquifer is usually

(a)

at sub atmosphere 
(b)

at atmospheric pressure
(c)

at 0.5 times of the atmospheric pressure
(d)

above atmospheric pressure
Answer:

Option (d)

Showing 1 to 10 out of 56 Questions
1 2 3 4 5 6