Civil Engineering Mcqs

Imhoff cone is used to determine_____________________?

• (A)  Settleable solids
• (B)  Suspended solids
• (C)  Dissolved solids
• (D)  None of these

Answer

Submitted By :Ali Uppal

As compared to fresh river water, sea water contains oxygen_________________?

• (A)  10% less
• (B)  20% less
• (C)  10% more
• (D)  20% more

Answer

Submitted By :Ali Uppal

With self cleansing velocity in sewers___________________?

• (A)  Silting occurs at bottom
• (B)  Scouring occurs at bottom
• (C)  Both silting and scouring occur at bottom
• (D)  Neither silting nor scouring occurs at bottom

Answer

Submitted By :Ali Uppal

The ratio of depths at partial flo________________?

• (A)  1 –
• (B)  1 –
• (C)  ½ (1 –
• (D)  ½ (1 –

Answer

Submitted By :Ali Uppal

If the grit in grit chambers is 4.5 million litres per day, its cleaning is done____________________?

• (A)  Manually
• (B)  Mechanically
• (C)  Hydraulically
• (D)  Electrically

Answer

Submitted By :Ali Uppal

The angle subtended by the surface of sewer water with partial flow, at sewer centre is 120°, the depth of sewerage is________________________?

• (A)  20 cm
• (B)  25 cm
• (C)  40 cm
• (D)  50 cm

Answer

Submitted By :Ali Uppal

The gas evolved in sewers is________________?

• (A)  Carbondioxide
• (B)  Hydrogen sulphide
• (C)  Methane
• (D)  All of these

Answer

Submitted By :Ali Uppal

In sewage, the solids in mg per litre is__________________?

• (A)  100 to 500
• (B)  500 to 1000
• (C)  1000 to 1500
• (D)  1500 to 2000

Answer

Submitted By :Ali Uppal

If is the diameter of upper circular portion, the area of cross-section of a standard egg shaped sewer, is____________________?

• (A)  D²
• (B)  D²
• (C)  D²
• (D)  D²

Answer

Submitted By :Ali Uppal

The small sewers are cleaned by____________________?

• (A)  Flushing
• (B)  Cane rodding
• (C)  Wooden pills
• (D)  None of these

Answer

Submitted By :Ali Uppal