Water Supply & Sanitation Engineering Online Test – Paper 1

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Created by

Vikash chaudhary

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Total Questions: 20
Time Allotted: 30 minutes
Passing Score: 40%
Randomization: No
Certificate: No
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👍 All the best!

1 / 20

1. The last trap provided in a house drainage system is:

a) q-trap

b) floor trap

c) nahni trap

d) interception trap

2 / 20

2. Any trap is intended to trap foul gases with the provision of:

a) clear seal

b) sewage or sullage

c) otta seal

d) water seal

3 / 20

3. The color of septic sewage is:

a) grey

b) black

c) white

d) blue

4 / 20

4. Nahni trap is made of:

a) mud

b) cast iron

c) steel

d) all of the above

5 / 20

5. In the partially ventilated single-stack system of plumbing, the number of vertical pipes is:

a) 1

b) 2

c) 3

d) 4

6 / 20

6. Flush air inlets are sometimes called:

a) ventilated lamp holes

b) well hole

c) clean outs

d) flushing tank

7 / 20

7. A structure constructed to remove obstacles in the sewer is known as:

a) catch basin

b) well holes

c) clean outs

d) flushing tanks

8 / 20

8. A lamp hole is helpful in:

a) illuminating sewer line

b) cleaning sewer line

c) repairing

d) testing sewers

9 / 20

9. Before entering a manhole, a candle is lowered into the manhole:

a) to illuminate it

b) to detect toxic gases

c) to give a signal to the adjacent manhole

d) to find out the presence of oxygen

10 / 20

10. Drop manholes are provided on sewers in:

a) hilly towns

b) plain towns

c) manholes are deep

d) none of the above

11 / 20

11. The best sewer material to resist hydrogen sulfide corrosion is:

a) RCC

b) brick masonry

c) glazed stoneware

d) asbestos cement

12 / 20

12. Stoneware pipes are generally not used for sewer mains because they are:

a) weak in compression

b) weak in tension

c) hydraulically less efficient

d) less resistant to organic corrosion

13 / 20

13. Which is in the correct order?

a) house s.-Lateral s.-Branch s.-Sub-main s.-Main (Trunk)-outfall sewer

b) house s.-Lateral s.-Branch s.-Sub-main s.-Outfall s.-Main (Trunk) sewer

c) main (Trunk)-Outfall s.-House s.-Lateral s.-Branch s.-Sub-main sewer

d) lateral s.-Branch s.-Sub-main s.-Main (Trunk)-Outfall s-House sewer

14 / 20

14. Clean out is provided in the underground......sewer in place of manhole.

a) main sewer

b) trunk sewer

c) outfall sewer

d) lateral sewer

15 / 20

15. Sewer preferred for a combined system of sewage is:

a) rectangular sewer

b) circular sewer

c) egg-shaped sewer

d) all of the above

16 / 20

16. The pipe joint commonly used in a pumping station is

a) flexible joint

b) expansion joint

c) flanged joint

d) socket and spigot joint

17 / 20

17. In order to consider temperature changes, metal pipes are usually provided with

a) expansion joints

b) contraction joints

c) anchorages

d) pressure relief valves

18 / 20

18. The type of joint generally used in cast-iron pipes is

a) flanged joint

b) socket and spigot joint

c) dresser coupling joint

d) all of the above

19 / 20

19. The types of joint not used to resist shock, vibration, etc. is

a) dresser coupling joint

b) victaulic joint

c) flanged joint

d) flexible joint

20 / 20

20. The type of joint used in joining the plain ends of cast-iron pipes is

a) flanged joint

b) flexible joint

c) dresser coupling joint

d) socket and spigot joint

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