WorksheetsCHAPTER 2: TRAPS AND DRAINAGE ABOVE & BELOW GROUND SYSTEM
Total questions: 15
Worksheet time: 8mins
1. Trap is used to:
A. Carry soil waste from a sanitary fixture.
B. Prevent waste of water from the cistern.
C. Prevent from foul gases to entering the building by trap the water (water seal).
D. To provide adequate access to carry out maintenance, repair and inspection works on underground drainage system.
2. Those are examples of type of traps:
A. P-Trap, Q-Trap, S-Trap and Bottle Trap
B. P-Trap, Intercepting Trap and Bottle Trap
C. Gully Trap, Floor Trap, Grease Trap and Drum Trap
D. Combination of answer A, B and C
3. The most practical form of trap ever developed is the . Originally, this trap was called as "Gooseneck" attributed to its form that is in the same manner as the neck of a goose.
A. P-Trap
B. Grease Trap
C. Drum Trap
D. Sand Trap
4. A type of trap that used for fixtures that discharge large amount of water (bathtubs, shower of floor drains.)
A. P-Trap
B. Deep Seal Trap
C. Grease Trap
D. Drum Trap
5. A good water trap shall not less of and below in order to provide a large surface of water seal.
A. 110mm
B. 70mm
C. 50mm
D. 130mm
6. The common material used in making a grease trap is .
A. PVC
B. Stainless Steel
C. Copper
D. Aluminium
7. The grease trap are not applied in the building such .
A. Schools and colleagues
B. Hotels
C. Restaurants
D. Office Building
8. A cause of loss of water seal are:
A. Back siphonage effect
B. Pipes not insulated
C. Small size of cistern used
D. Compression or back pressure
9. can trap heavier object that fall into the drain.
A. Intercepting Trap
B. Gully Trap
C. P-Trap
D. S-Trap
10. is facing highest loss of water seal.
A. S-Trap
B. Q-Trap
C. P-Trap
D. Gully Trap
11. A stack that doesn't carry soil from a sanitary fixture.
A. Waste stack
B. Soil Stack
C. Single stack
D. Double / Dual stack
12. The dimension of a vent pipe must not exceed 1m above roof in order to:
A. Provide high pressure of water flow
B. Prevent from loss of water seal
C. Produce back siphonage
D. Easy to discharge soil from sanitary fittings
-Installation of vent pipe is complicated.
-require more pipelines for vent pipe.
13. This statement refers to:
A. Dual pipe
B. Combined pipe
Single stack
An anti siphon or vent pipe are used to prevent from sealing of trap by siphonage or back pressure and it must be connected to the discharge pipe in direction of the flow of water at a point.
14. This refers to:
A. Single Stack
B. Fully ventilated pipe system
C. Dual pipe system
- Risk of water seal breaking in the tap is higher
-Poorly ventilation system
-Back pressure occurs
15. These are the effects of using:
A. Fully ventilated pipe system
B. Dual pipe system
C. Single stack system
