# A town has an existing horizontal flow sedimentation tank with an overflow rate of 17m 3/day/m 2, and it is desirable to remove particles that have settling velocity of 0.1mm/sec. Assuming the tank is an ideal sedimentation tank, the percentage of particles removal is approximately equal to

1.  30%

2.  50%

3.  70%

4.  90%

4

50\%

Explanation :
No Explanation available for this question

# A valley curve has a descending gradient of 1 in 40 followed by an ascending gradient of 1 in 50. The length of the valley curve required for a design speed of 80 km/hour for comfort condition is

1.  199 m

2.  116 m

3.  58 m

4.  37 m

4

58 m

Explanation :
No Explanation available for this question

# In a certain situation ,waste water discharged into a river,mixes with the river water instantaneously and completely.Following is the data available: Waste water : DO=2.00mg/L Discharge rate-1.10m3/s River water : DO=8.3 mg/L Flow rate=8.70 m3/s Temperature=200C Initial amount of DO in the mixture of waste and river shall be:

1.  5.3mg/L

2.  6.5mg/L

3.  7.6mg/L

4.  8.4mg/L

4

7.6mg/L

Explanation :
No Explanation available for this question

# Limit of the function

1.  1/2

2.  0

3.  infinity

4.  1

4

1

Explanation :
No Explanation available for this question

# The function f(x)=ex is

1.  even

2.  odd

3.  Neither even nor odd

4.  none of the above

4

odd

Explanation :
No Explanation available for this question

# If A is any nxn matrix and k is a scalar,|KA|=α|A|,where a is

1.  kn

2.  nk

3.  kn

4.  n/k

4

kn

Explanation :
No Explanation available for this question

# A circular primary clarifier processes an average flow of 5005m3/d of municipal waste water.The overflow rate is 35m3/d .The diameter of clarifier shall be

1.  10.5m

2.  11.5m

3.  12.5m

4.  13.5m

4

13.5m

Explanation :
No Explanation available for this question

# In reinforced concrete, pedestal is defined as compression member, whose effective length does not exceed its dimension by

1.  12 times

2.  3 times

3.  16 times

4.  8 times

4

3 times

Explanation :
No Explanation available for this question

# The minimum area of tension reinforcement in a beam shall be greater than

1.  0.85bd/fy

2.  0.85fy/ bd

3.  0.04bd

4.  0.04bd/y

4

0.85bd/fy

Explanation :
No Explanation available for this question

1.  0.07

2.  0.13

3.  0.15

4.  0.4

4