400, the velocity of flow in the two sewers will have a ratio of (Size of both the sewers being same):

1. 1/2

2. 1

3. (2)2/3

4. 2

View Answer

Correct Answer :

Explanation :
No Explanation available for this question

What is the correct sequence of the following treatment units employed in a conventional sewage treatment plant 1. Screen chamber 2. Primary settling tank 3. Trickling filter 4. Grit chamber 5. Secondary settling tank

1. 5, 4, 2, 3 and 1

2. 1, 4, 2, 3 and 5

3. 5, 2, 3, 4 and 1

4. 1, 4, 3, 2 and 5

View Answer

Correct Answer :

1, 4, 2, 3 and 5

Explanation :
No Explanation available for this question

Which of the following parameters are employed in the design of trickling filter 1. Hydraulic loading rate 2. Organic loading rate 3. Detention time 4. Weir loading rate

1. 1, 2, 3 and 4

2. 1 and 2 only

3. 2 and 3 only

4. 3 and 4 only

View Answer

Correct Answer :

1 and 2 only

Explanation :
No Explanation available for this question

In activated sludge process, 1mld (by volume) of secondary sludge has to be returned to keep the required MLSS concentration in the aeration tank. This sludge has a water content of 99%. If the sludge water content is reduced to 98%, what volume of the sludge will be needed to be recycled

1. 0.25mld

2. 0.5mld

3. 0.75mld

4. 1.00mld

View Answer

Correct Answer :

0.5mld

Explanation :
No Explanation available for this question

Consider the following statements: 1. Grease data is a measure of effectiveness of primary settling tanks. 2. Volatile acid data provide information concerning anaerobic degradation of organic matter 3. Total and volatile solids data are indispensable in the design and operation of sludge digestion, vacuum filter and incineration units. 4. Ammonia and organic nitrogen data are helpful in controlling aerobic treatment costs to a minimum. Which of these statements are correct

1. 1, 2, 3 and 4

2. 1, 2 and 3 only

3. 1, 2 and 4 only

4. 2, 3 and 4 only

View Answer

Correct Answer :

2, 3 and 4 only

Explanation :
No Explanation available for this question

Consider the following statements in regard to an electrostatic precipitator: 1. Power requirement is small compared to other devices. 2. Immune to variable particulate loadings and flow rates. 3. 99+ percent efficiency is obtainable. Very small particles can be collected, wet or dry. 4. Can handle both gases and mists at high volume of flow Which of these statements are correct

1. 1, 2, 3 and 4

2. 1, 3 and 4 only

3. 1, 2 and 3 only

4. 2, 3 and 4 only

View Answer

Correct Answer :

2, 3 and 4 only

Explanation :
No Explanation available for this question

Consider the following statements: 1. Noise pollution can be reduced using double-glass window panes. 2. Glass absorbs the noise. 3. The air trapped in the double-glass system acts as an insulator and reduces the noise. 4. The noise totally reflects back due to the two layers of glass.

1. 1, 2, 3 and 4

2. 1, 3 and 4 only

3. 1, 2 and 3 only

4. 2, 3 and 4 only

View Answer

Correct Answer :

1, 2 and 3 only

Explanation :
No Explanation available for this question

Consider the following statements: 1. Sound is a form of mechanical energy from a vibrating substance, transmitted by a cyclic series of compressions and rarefactions of the molecules of the material through which it passes. 2. In a pure tone, the wave pattern of the alternating positive and negative sound pressure is of ideal sinusoidal form with fixed wave length, frequency and amplitude. 3. The speed of transmission of sound is a function of the transmitting medium and its temperature. 4. The audible range of 200 to 25000Hz is considered normal for young adults. Which of these statements are correct in respect of sound transmission

1. 1, 2, 3 and 4

2. 1, 2 and 4 only

3. 1, 2 and 3 only

4. 2, 3 and 4 only

View Answer

Correct Answer :

1, 2 and 3 only

Explanation :
No Explanation available for this question

Under the Nagpur Road Plan, which of the following are NOT relevant in planning the road development program in a backward district 1. Existing agriculture drainage network of drain canals 2. Existing number of Panchayat unions 3. Existing length of mud-track roads 4. Number of villages with population of 10000 and above

1. 1, 2, 3 and 4

2. 1, 2 and 3 only

3. 1, 2 and 4 only

4. 2, 3 and 4 only

View Answer

Correct Answer :

1, 2, 3 and 4

Explanation :
No Explanation available for this question

The earth pressure behind a bridge abutment is:

1. Active

2. Passive

3. At rest

4. Constant always and everywhere

View Answer

Correct Answer :

At rest

Explanation :
No Explanation available for this question

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