WT 3

通報

問題一覧

This type of ground surface generate more rainwater runoff

concrete sidewalk

What is the minimum condensate pipe diameter of a cooling equipment with capacity through 125 ToR?

38 mm

The principal artery of the venting system to which vent branches are connected.

Main Vent

The side walls of a Septic Tank shall be at least ____ above the liquid depth.

The extension of a soil or waste stack above the highest horizontal drain connected to the stack.

Stack Vent

Maximum horizontal distance of the trap arm with a diameter of 38 mm

1.07 m

What is the estimated sewage flow rate of bowling alleys with snack bar only?

283.9 LpD per lane

Minimum water seal of a grease trap

51 mm

Wet venting is limited to _____ fixtures

Prohibited vent pipe material below ground

Galvanized wrought iron

A water that stands in or passes through the ground

Ground water

All condensers and sumps shall be properly trapped at the outlet with a deep seal trap extending to within ____ of the bottom of the tank.

Maximum length of a tailpiece

0.6 m

What is the maximum length allowed for a vent stack serving 48 DFU?

Which among the choices is a prohibited trap?

Crown trap

A group vent pipe that connects to the vent stack

circuit vent

The minimum depth of the sand interceptor under the invert of the outlet pipe is _____.

610 mm

What is the minimum distance from disposal field to another disposal field?

1.2 m

In a granule test of a water closet, the initial flush of three different flushes must result in no more than _____ on average remaining in the bowl.

125

The size of a vent pipe is determined by _____.

FU and length

Determine the size of horizontal rainwater piping with a slope of 2% for a 350 sqm roof in an area where the the rainfall is 102 mm/hr.

127 mm

Maximum number of slip joint fitting that may be used on the outlet side of a trap

Elastomeric gasketed and rubber-ring joints shall comply with _____ installation standard

IAPMO

Water closets that are made to accommodate overweight and obese people

Bariatric Water Closet

Normally in Manila, the rainfall intensity used is _____.

102 mm

The maximum trap loading of a pipe size 76 mm

Minimum dimension of a sand interceptor's inlet opening

0.2 sqm

If the development is mostly built of concrete flooring, how can this affect the stormwater sizing?

the drains might be larger

If a septic tank can have an effective capacity of 4000 L, how much does the secondary compartment hold?

1,333 L

_____ are recommended for oil handling piping works

Neoprene gaskets

When disposal fields and/or seepage pits are installed in sloping ground, the minimum horizontal distance between any part of the leaching system and ground surface shall be _____.

15 feet

What is the storage factor for self-service auto washers?

1.5

What is the gauge pressure to be maintained for air tests as substitute for water test in water pipings?

344.5 kpa

Minimum spacing between trenches or leaching beds

1.20 m

What is the sewage that turns dark and smell unpleasantly due to anaerobic decomposition?

septic

What is required when a soil or waste stack extends 10 or more stories?

Parallel vent stack

What downspout size would you specify for a 800 sqm roof with a rainfall intensity around the area of 152.4 mm/hr?

152 mm

What will be the size of 0.5% sloped circular bottom gutter serving a roof area of 180 sqm, and the rainfall intensity around the area is 76 mm/hr?

178 mm

What is an underground drain pipe that receives only subsurface or seepage water and convey it to a sump for disposal by gravity flow or by lift pump?

subsoil drain

What is the horizontal distance required of a vent pipe from any openable window, door opening, air intake, or vent shaft?

3 m

Connects directly with an individual trap underneath or behind the fixture

Backvent Pipe

Vertical vent pipes installed in a roof used for other purposes shall extend a minimum of _____ above such roof.

2.1 m

Every abandoned building sewer shall be plugged or capped within _____ of the property line

1.5 m

Rainwater piping located within a medium height building basement area shall be of Galvanized Iron, _____.

Schedule 30

Minimum distance of a 32 mm trap arm diameter to a vent

64 mm

Which of the following may be true about the sovent system?

it has lesser maintenance cost

In getting the roof area for the computation of rainwater piping size, for two walls opposite of differing heights, add ____ of wall area above top of lower wall to the roof area.

50%

For each 18.9 Lpm flow over 75.5 Lpm, the area of the sand interceptor inlet section is to be increased by _____.

0.09 sqm

When the first compartment exceeds 3.7 m in length, an additional ____ shall be provided.

manhole

What can be drained through an airbreak?

air washer

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