Weekly Test 3

通報

問題一覧

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

283.9 LpD per lane

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

1.5

Minimum dimension of a sand interceptor's inlet opening

0.2 sq.m.

A group vent pipe that connects to the vent stack

Circuit Vent

Prohibited vent pipe material below ground

Galvanized Wrought Iron

Minimum spacing between trenches or leaching beds

1.20 m

Which among the choices is a prohibited trap?

Crown trap

Normally in Manila, the rainfall intensity used is _____.

102 mm

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

Wet venting is limited to ______ fixtures

Maximum length of a tailpiece

0.6 m

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

subsoil drain

Connects directly with an individual trap underneath or behind the fixture

Backvent Pipe

What can be drained through an airbreak?

air washer

The size of a vent pipe is determined by __________.

FU and length

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%

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

IAPMO

The minimum inlet and outlet size for sand interceptor

76 mm

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

For accessible toilets, signs on walls and doors should be located at a maximum height of _______.

1.60 m

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

3 m

The maximum trap loading of a pipe size 76 mm

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

2.1 m

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

1,333 L

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

Main Vent

The bottom of the water pipe, at all points shall be at least _________ above the top of the sewer or drain line.

0.3 m

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

1.2 m

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

septic

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

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

manhole

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

Schedule 30

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

152 mm

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

64 mm

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

610 mm

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

9”

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.

6”

A 203 mm diameter and larger sewer may have a slope of _________.

0.5%

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

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

38 mm

A water that stands in or passes through the ground

Ground Water

Jointing method for soft copper water tubing

Flared Joint

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

Parallel Vent Stack

Minimum water seal of a grease trap

51 mm

Septic tanks should be cleaned when scum or sludge occupies ________ of the tank volume.

1/3

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

1.5 m

Water closets that are made to accommodate overweight and obese people

Bariatic Water Closet

_________ are recommended for oil handling piping works.

Neoprene Gaskets

Horizontal distance of the trap arm with a diameter of 38 mm

1.07 m

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

344.5 kPa

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