# A concentrated load of 50kN acts on the surface of ground. The increase in vertical stress directly below the load at a depth of 4 m will be (Value of influence factor is 0.48)

1.  1.5kN/m2

2.  15kN/m2

3.  150kN/m2

4.  0.15kN/m2

4

1.5kN/m2

Explanation :
No Explanation available for this question

# Consider the following statements: 1. The bulb of pressure under strip footing forms in the length-wise directions. 2. The bulb of pressure under a strip footing forms in the width-wise direction 3. Contact pressure at the edges of a rigid footing on saturated clay is theoretically infinite. Which of these statements are correct

1.  1, 2 and 3

2.  2 and 3 only

3.  1 and 2 only

4.  1 and 3 only

4

2 and 3 only

Explanation :
No Explanation available for this question

# Consider the following statements: 1. Undisturbed samples may be obtained with the help of augers 2. Auger drilling is most effective in clayey soils 3. Hollow stem augers are sometimes used to drill holes in silty sand Which of these statements are correct

1.  1, 2 and 3

2.  1 and 2 only

3.  2 and 3 only

4.  1 and 3 only

4

2 and 3 only

Explanation :
No Explanation available for this question

# A single pile, 50 cm in diameter and 16 m long, is driven in clay having an average unconfined compressive strength of 100kN/m2. The ultimate load carrying capacity of the pile, neglecting end bearing if any, and assuming shear mobilization of 0.75 around the pile, is nearly:

1.  840kN

2.  900kN

3.  940kN

4.  1000kN

4

940kN

Explanation :
No Explanation available for this question

# Consider the following statements: 1. If the soil is not black in color, it is unlikely to be a swelling soil 2. The swelling pressure of a fine grained soil depends on its initial water content and density 3. The swelling pressure of a fine grained soil depends on the nature of the pore fluid. Which of these statements are correct

1.  1, 2 and 3

2.  1 and 2 only

3.  1 and 3 only

4.  2 and 3 only

4

2 and 3 only

Explanation :
No Explanation available for this question

# The dissolved oxygen in a water sample is generally estimated by modified Winkler method. The water sample is taken in a 300 ml BOD bottle and the dissolved oxygen is fixed by adding:

1.  1 ml of concentrated H2SO4 followed by addition of 1 ml of MnSO4 reagent and contents mixed thoroughly, thereafter waiting for 5-10 minutes, and then 1 ml of alkali-iodide azide reagent is added

2.  1 ml of alkali-iodide-azide reagent followed by addition of 1 ml of concentrated H2SO4 and then the contents mixed thoroughly, thereafter waiting for 5-10 minutes, 1 ml of MnSO4 reagent is added

3.  1 ml of MnSO4 followed by addition of 1 ml alkali-iodide-azide reagents and then the contents mixed thoroughly, thereafter waiting for 5-10 minutes and then 1 ml of concentrated H2SO4 is added.

4.  1 ml of concentrated H2SO4 followed by addition of 1 ml of alkali-iodide-azide reagent and then the contents mixed thoroughly, thereafter waiting for 5-10 minutes and then 1 ml of MnSO4 reagent is added

4

1 ml of MnSO4 followed by addition of 1 ml alkali-iodide-azide reagents and then the contents mixed thoroughly, thereafter waiting for 5-10 minutes and then 1 ml of concentrated H2SO4 is added.

Explanation :
No Explanation available for this question

# Consider the following statements: 1. Typhoid fever is caused by viral infection. 2. Infectious hepatitis is caused by bacterial infection 3. Cholera is caused by bacteria 4. Amoebic dysentery is caused by protozoal infection Which of these statements are correct

1.  1, 2, 3 and 4

2.  1, 2 and 3 only

3.  3 and 4 only

4.  2 and 3 only

4

3 and 4 only

Explanation :
No Explanation available for this question

# Which of the following statements are the important characteristics of a slow sand filter 1. Cleaning of filter is done by scraping and sand removal 2. Lack of pretreatment 3. Greater efficiency of bacterial removal as compared to rapid sand filter 4. Efficient in color, taste and odor removal

1.  1, 2, 3 and 4

2.  1, 2 and 4 only

3.  2, 3 and 4 only

4.  1, 2 and 3 only

4

1, 2 and 3 only

Explanation :
No Explanation available for this question

# Which of the reasons given below favor the use of cast iron pipe for city water supply 1. Strong in tension; and pipe of large diameter (up to 6 m) can be made 2. Easy to make joints 3. Durable 4. Corrosion-resistant

1.  1, 2, 3 and 4

2.  2, 3 and 4 only

3.  1, 2 and 4 only

4.  1, 3 and 4 only

4

1, 2, 3 and 4

Explanation :
No Explanation available for this question

# The self-cleansing velocity in a sewer depends on: 1. BOD (soluble) 2. Slope of the sewer 3. Ratio of depth of flow sewage to sewer diameter ratio

1.  1, 2 and 3

2.  1 and 2 only

3.  2 and 3 only

4.   1 and 3 only

4