Practice Test: Question Set - 02
1. Which device is used to prevent sewer gases from entering the building?
- (A) Filter
- (B) Trap
- (C) Ventilator
- (D) Vacuum pump
2. What is the term for water inside trap which prevents gas from entering?
- (A) Drain water
- (B) Water seal
- (C) Waste water
- (D) Trap safety
3. What should be the minimum diameter of the connecting pipe in the septic tank?
- (A) 60 mm
- (B) 100 mm
- (C) 300 mm
- (D) 700 mm
4. What is the average temperature of sewage in India?
- (A) 10°C
- (B) 15°C
- (C) 20°C
- (D) 25°C
5. What is the name of the water coming out of the kitchen, bathroom and wash basin?
- (A) Garbage
- (B) Sullage
- (C) Sewage
- (D) Discharge
6. What is the type of manhole having a depth greater than 1.5 m is called?
- (A) Straight
manhole
- (B) Deep manhole
- (C) Shallow
manhole
- (D) Normal
manhole
7. Which type of pump should be selected in order to pump the sewage from a septic tank to the water treatment system?
- (A) Vertical
slump pump
- (B) Progressive
cavity pump
- (C) Centrifugal
pump
- (D) Screw pump
8. Which type of sewer system is preferred in India?
- (A) Partial
- (B) Combined
- (C) Direct
- (D) Separate
9. Which material is used to make manhole cover?
- (A) Cast iron
- (B) Cement
- (C) Wood
- (D) Steel
10. Which sewer resist sulphide corrosion?
- (A) Brick sewer
- (B) Cast iron
sewer
- (C) R.C.C. sewer
- (D) Lead sewer
11. What is the angle between the drains and inspection manhole?
- (A) 45°
- (B) 90°
- (C) 135°
- (D) 180°
12. What is the name for all kinds of liquid waste of a building?
- (A) Rubbish
- (B) Garbage
- (C) Ashes
- (D) Sewage
13. What is the first stage in sewage treatment process?
- (A) Sedimentation
- (B) Screening
- (C) Filtration
- (D) Softening
14. What is the maximum spacing of manhole sewer size up to 0.3 mf?
- (A) 20 m
- (B) 30 m
- (C) 45 m
- (D) 75 m
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