Two completely penetrating wells are located L (in metres) apart, in homogeneous

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Two completely penetrating wells are located L (in metres) apart, in homogeneous confined aquifer. The drawdown measured at the mid point between the two wells (at a distance of 0.5 L from both the wells) is 2.0 m when only the first well is being pumped at the steady rate of Q₁ m³/sec. When both the wells are being pumped at identical steady rate of Q₂ m³/sec, the drawdown measured at the same location is 8, 0 m. It may be assumed that the drawdown at the wells always remains at 10.0 m when being pumped and the radius of influence is larger than 0.5 L Q₁/Q₂ is equal to
Options
A. 8/5
B. 4/3
C. 5/8
D. ln (L/2)

Correct Answer

ln (L/2)

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4. A road is provided with a horizontal circular curve having deflection angle of 55� and centre line radius of 250 m. A transition curve is to be provided at each end of the circular curve of such a length that the rate of gain of radial acceleration is 0.3 m/s³ at a speed of 50 km per hour. Length of the transition curve required at each of the ends is
Options
A. 2.57 m
B. 33.33 m
C. 35.73 m
D. 1666.67 m

5. Bituminous materials are commonly use in highway construction because of their good
Options
A. tensile and compression properties.
B. binding and water proofing properties.
C. shear strength and tensile properties.
D. bond and tensile properties.

6. A test plate 30 cm x 30 cm resting on a sand deposit settles by 10 mm under a certain loading intensity. A footing 150 cm x 200 cm resting on the same sand deposit and loaded to the same load intensity settles by
Options
A. 2.0 mm
B. 27.8 mm
C. 3.02 mm
D. 50.0 mm

7. The stress-strain behaviour of soils as shown in the following figure corresponds to :
Options
A. Curve 1 : Loose sand and normally consolidated clay
Curve 2 : Loose sand and over consolidated clay
B. Curve 1 : Dense sand and normally consolidated clay
Curve 2 : Loose sand and over consolidated clay
C. Curve 1: Dense sand and over consolidated clay
Curve 2: Loose sand and normally consolidated clay
D. Curve 1: Loose sand and over consolidated clay
Curve 2: Dense sand and normally consolidated clay

8. For a 'best' symmetrical trapezoidal section of an open channel with a given area of section and side slopes, one of the following statements holds true :
Options
A. Half the top width is equal to one of the side slopes
B. Half the top width plus the bottom width is equal to both the side slopes put together
C. Water depth is equal to half bottom width
D. Hydraulic mean depth is equal to half the top width

10. Flow at critical depth takes place in an open channel When
Options
A. for a given specific energy, discharge is maximum
B. for a given discharge, specific energy is maximum
C. discharge is minimum for a given specific energy
D. discharge is maximum for a given specific force

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