# The present population of a community is 28000 with an average water consumption of 4200m3/d. The existing  water treatment plant has a design capacity of 6000 m3/d. It is expected that the population will increase to 44000 during the next 20 years. The number of years from now when the plant will react its design capacity, assuming an arithmetic rate of population growth, will be

1.  5.5 years

2.  8.6 years

3.  15.0 years

4.  16.5 years

4

15.0 years

Explanation :
No Explanation available for this question

# For the frame shown in the Figure, the maximum bending moment in the column is

1.  zero

2.  400kNm

3.  100kNm

4.  200kNm

4

400kNm

Explanation :
No Explanation available for this question

# The order or the flexibility matrix for a structure is

1.  equal to the number of redundant forces

2.  more than the number of redundant forces

3.  less than the number of redundent forces

4.  Equal of the number of redundant forces plus three

4

equal to the number of redundant forces

Explanation :
No Explanation available for this question

# An existing 300 mm diameter circular sewer is laid at a slope of 1:28 and carries a peaok discharge of 1728m3/d.Use the partial flow diagram shown in the figure below and assume Manning’s n = 0.015. At the peak discharge, the depth of flow and the velocity are, respectively

1.  45 mm and 0.28 m/s

2.   120 m and 0.50 m/s

3.   150 mm and 0.57 m/s

4.   300 mm and 0.71 m/s

4

150 mm and 0.57 m/s

Explanation :
No Explanation available for this question

# A cantilever beam of span '1’is loaded with a concentrated load 'P' at the free end. Deflection of the beam at the free end is

1.  PL3/48EI

2.  5PL3/384EI

3.  PL3/3EI

4.  PL3/6EI

4

PL3/3EI

Explanation :
No Explanation available for this question

# An analysis for determination of solids in the return sludge of activated sludge process was done as follows : (1) A crucible was dried to a constant mass of 62.485 g. (2) 75 ml of a well-mixed sample was taken in the crucible. (3) The crucible with the sample was dried to a constant mass of 65.020 g in a drying oven at 1040 C.(4)The crucible with the dried sample was placed in a muffle furnace at 6000 C for an hour. After cooling, the mass of the crucible with residues was 63:145 g.The concentration of organic fraction of solids present in the return sludge sample is

1.   8800 mg/1

2.   25000 mg/1

3.  33800 mg/1

4.  42600 mg/1

4

33800 mg/1

Explanation :
No Explanation available for this question

# IS 459 - 1978 recommends to provide certain minimum steel in a RCC beam

1.  to ensure compression failure

2.  to avoid rupture of steel in case a flexural failure occurs

3.  to hold the stirrup steel in position

4.  to provide enough ductility to the beam

4

to avoid rupture of steel in case a flexural failure occurs

Explanation :
No Explanation available for this question

# The permissible bending tensile stress in concrete for the vertical wall of an R.C. water tank made of M 25 concrete is

1.  8.5 N/mm2

2.  6.0 N/mm2

3.  2.5 N/mm2

4.  1.8 N/mm2

4

1.8 N/mm2

Explanation :
No Explanation available for this question

# Water samples (X and Y) from two different sources were brought to the laboratory for the measurement of dissolved oxygen (DO) using modified Winkler method. Samples were transferred to 300 ml BOD bottles. 2 ml of MnSO4 solution and 2 ml of alkaliodide-azide reagent were added to the bottles and mixed. Sample X developed a brown precipitate, whereas sample Y developed a white precipitate.In reference to these observations, the correct statement is

1.  Both the samples were devoid of DO

2.  Sample X was devoid of DO while sample Y contained DO

3.  Sample X contained DO while sample Y was devoid of DO

4.  Both the samples contained DO

4

Sample X contained DO while sample Y was devoid of DO

Explanation :
No Explanation available for this question

# Permissible bending tensile stress in high yield strength deformed bars of grade 415 N/mm2 in a beam is

1.  190 N/mm2

2.  230 N/mm2

3.  140 N/mm2

4.  None of the above

4