# Civil Engineering - GATE Exam Questions

### Exercise :: GATE Exam Questions - Section 7

21.

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

 A. 2.0 mm B. 27.8 mm C. 3.02 mm D. 50.0 mm

Explanation:

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22.

Cavitation is caused by

 A. high velocity B. low pressure C. high pressure D. high temperature

Explanation:

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23.

Flow at critical depth takes place in an open channel When

 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

Explanation:

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24.

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

 A. 8/5 B. 4/3 C. 5/8 D. ln (L/2)

Explanation:

No answer description available for this question. Let us discuss.

25.

A footing 2 m x 1 m exerts a uniform pressure of 150 kN/m2 on the soil. Assuming a load dispersion of 2 vertical to 1 horizontal the average vertical stress (kN/m2) at 1.0 m below the footing is

 A. 50 B. 75 C. 80 D. 100