• A. Mean radius of sewer
• B. Difference in heads between two points in circular pipes
• C. Mean of radii in a pipe line of varying cross-sections
• D. Cross-sectional area/wetted perimeter

Answer: Option D

Explanation:

• A. Centrifugal pump
• B. Pneumatic ejector
• C. Reciprocating pump
• D. None of these

Answer: Option A

Explanation:

• A. The sewage when running full from inside, is called internal pressure
• B. The internal pressure if any, causes tensile stress in the pipe material
• C. Pressure sewers are designed to be safe in tension
• D. All the above

Answer: Option D

Explanation:

• A. 1-3-4-2
• B. 1-4-3-2
• C. 1-3-2-4
• D. 1-2-4-3

Answer: Option B

Explanation:

• A. Clay
• B. Sand
• C. Silt
• D. Coarse gravel

Answer: Option D

Explanation:

• A. crown
• B. camber
• C. gradient
• D. beam

Answer: Option A

Explanation:

• A. calcium sulphate
• B. magnesium sulphate
• C. calcium nitrate
• D. calcium bicarbonate

Answer: Option D

Explanation:

• A. helps growth of bacterias
• B. impedes growth of algae
• C. increases dissolved oxygen content
• D. reduces turbidity.

Answer: Option C

Explanation:

• A. 0.5
• B. 1
• C. 1.5
• D. 2.5

Answer: Option B

Explanation:

• A. odour
• B. colour
• C. bacterias
• D. hardness

Answer: Option A

Explanation:

• A. maximum flow only
• B. minimum flow only
• C. average flow only
• D. maximum and minimum flow

Answer: Option C

Explanation:

• A. maximum at noon
• B. minimum at noon
• C. maximum at midnight
• D. same throughout the day

Answer: Option A

Explanation:

• A. resistor
• B. inductor
• C. capacitor
• D. current source

Answer: Option C

Explanation:

• A. 8
• B. 4
• C. 16
• D. 32

Answer: Option A

Explanation:

• A. atmospheric pressure
• B. surface tension
• C. force of adhesion
• D. force of cohesion

Answer: Option B

Explanation: