Practice Pakistan's most useful MCQs for competitive exams

The rational formula for peak drainage discharge, was evolved by_________________?

• (A)  Fruhling
• (B)  Lloyd David
• (C)  Kuichling
• (D)  All of these

Answer

Submitted By :Ali Uppal

The drainage area of a town is 12 hectares. Its 40% area is hard pavement ( K = 0.85), the 40% area is unpaved streets (K = 0.20) and the remaining is wooded areas (K = 0.15). Assuming the time of concentration for the areas as 30 minutes and using the formula Ps = 900/(t + 60) the maximum run off is__________________?

• (A)  0.10 cumec
• (B)  0.12 cumec
• (C)  0.15 cumec
• (D)  0.20 cumec

Answer

Submitted By :Ali Uppal

Assertion A.: The determination of pH value of sewerage is important. Reason (R): The efficiency of certain treatment methods depends upon the availability of pH value________________?

• (A)  Both A and R are true and R is the correct explanation of A
• (B)  Both A and R are true but R is not a correct explanation of A
• (C)  A is true but R is false
• (D)  A is false but R is true

Answer

Submitted By :Ali Uppal

For the open drain (N = 0.025) shown in the below figure, the discharge is________________?

• (A)  26.88 cumecs
• (B)  27.88 cumecs
• (C)  28.88 cumecs
• (D)  29.88 cumecs

Answer

Submitted By :Ali Uppal

The Chezy’s constant C in the formula V = C_________________?

• (A)  Size of the sewer
• (B)  Shape of the sewer
• (C)  Roughness of sewer surface
• (D)  All the above

Answer

Submitted By :Ali Uppal

If the flame of a miner’s safety lamp in the upper layers of the sewer forms an explosive, the sewer certainly contains_______________?

• (A)  Hydrogen sulphide
• (B)  Carbon dioxide
• (C)  Methane
• (D)  Oxygen

Answer

Submitted By :Ali Uppal

The coagulant which is generally not used for treating the sewage, is__________________?

• (A)  Alum
• (B)  Ferric chloride
• (C)  Ferric sulphate
• (D)  Chlorinated copperas

Answer

Submitted By :Ali Uppal

Which of the following pumps in used to pump sewage solids with liquid sewage without clogging the pump is ?

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

Answer

Submitted By :Ali Uppal

The rainfall at any place may be determined by__________________?

• (A)  Its intensity
• (B)  Its direction
• (C)  Its frequency
• (D)  All the above

Answer

Submitted By :Ali Uppal

The sludge does not contain waste water from_________________?

• (A)  Bath rooms
• (B)  Wash basins
• (C)  Kitchen sinks
• (D)  Toilets

Answer

Submitted By :Ali Uppal