CHAPTER 2: TRAPS AND DRAINAGE ABOVE & BELOW GROUND SYSTEM

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