SPDI Combined Set

In a horizontal soil and waste pipe, clean-out

should be provided in every interval of ______.

A. 10 mts

B. 12 mts

C. 15 mts

D. 18 mts

C. 15 mts

Which purification can be done to remove

silts, dirt’s and other objectionable minerals

in water?

A. Siltation

B. Filtration

C. Sedimentation

D. Pollution

B. Filtration

What are the devices found inside fire hose

cabinet? (select three).

a. Fire Hose Rack

b. Fire Extinguisher

c. Standard Pipe

d. Ax

A. b, c & d

B. a, b & d

C. a, c& d

D. a, b & c

D. a, b & c

What is that height always considered in

designing water supply system in medium

and high-rise buildings?

A. Fixture units

B. Friction loss

C. Static head

D. Height of the highest fixture/s

D. Height of the highest fixture/s

What do you call a faucet having an outside

thread in its orifice to allow the adoption of

hose in under so water farther distances

conveniently?

A. Hose Bibb

B. Brass

C. Plain

D. Stainless steel fauce

A. Hose Bibb

A pipe which makes an angle of more than 45

degrees from the horizontal is considered

________.

A. horizontal

B. vertical

C. cracked

D. offset

B. vertical

PE plastic tubing is material used for water

service connection. What does PE stand for?

A. Polyethylene

B. Plastic Extrusion

C. Poly Enzyme

D. Plastic Expander

A. Polyethylene

Building sewers shall be tested by

completely filling the sewer line with water

from the lowest to __________.

A. the highest point

B. at least ground level

C. at least 5 ft. head

D. at least 10 ft. head

A. the highest point

What is that distance between faucet outlet

and the flood level rim of the basin into

which it discharges?

A. Air Chamber

B. Air Valve

C. Air Bubble

D. Air Gap

D. Air Gap

What is a natural or artificial place where

water is collected and stored for use,

especially water supplying in community,

irrigating land or furnishing power?

A. Reservoir

B. Cistern

C. Surface water

D. Aquifer

A. Reservoir

What is the color coding of an Industrial

piping system?

A. grey

B. brown

C. orange brown

D. blue

A. grey

An installed flushometer valve is found in

every ________.

A. lavatory

B. bidet

C. bathtub

D. urinal

D. urinal

What is the size of downspout if the rainfall

intensity on 200 mm (8”) if the deck is 102

mm2? (Use: Table P-02)

A. 90 mm ∅

B. 150 mm ∅

C. 75 mm ∅

D. 100 mm ∅

A. 90 mm ∅

What consist of a wedge-shaped plug which

is screwed down to seat between two brass

rings surrounding the inlet pipe so that a

double seal is obtained?

A. Door valves

B. Entry valves

C. Gate valves

D. Fence valves

C. Gate valves

What are the valves that are installed in a

pipe to prevent backflow of water?

A. Ball valve

B. Gate valve

C. Check valve

D. Angle valve

C. Check valve

What do you call a tank that is used so that

the pneumatic tank or other pumps suck the

water from this tank and not the Public main,

so that it will not deprive the neighbors of

water due to pressure?

A. Plunger Tank

B. Air Tank

C. Sipping Tank

D. Suction Tank

D. Suction Tank

What is the equivalent diameter of a PPR

Pipe ½” ∅ in millimeter?

A. 25 mm

B. 12 mm

C. 20 mm

D. 32 mm

B. 12 mm

1in : 25.4mm
0.5in: 12.7mm

What is a vertical soil pipe conveying fecal

matter and liquid waste?

A. soil leader

B. soil branch

C. soil stack

D. soil conductor

C. soil stack

When installing cast iron, piping in 5 ft

lengths installed horizontally below the slab

that shall be supported with hangers, what

interval do you use?

A. 5 ft.

B. 12 ft.

C. 10 ft.

D. 15 ft.

A. 5 ft.

What is a sanitary fitting equivalent to an

angle of 90 ½ ?

A. 3/8 bend

B. ¼ bend

C. 1/8 bend

D. 1/16 bend

B. ¼ bend

Where are clean-outs required? (Select 3).

1. At every 90 ½ turn

2. At every end of a pipe installation

3. At every 15 meters of horizontal piping

4. At every 45 ½ turn.

A. 4, 1&2

B. 1, 2&3

C. 3, 4&1

D. 2, 3&4

C. 3, 4 & 1

Which statements about drainage are correct?

1. Drains should always slope at a minimum of 1/8 per foot (0.00991 m.) or 9.9 m
2. The vent stack extends
3. Vents help prevent the drainage of water from traps.
4. The house drain cannot also be called the building sewer
5. Clean outs are always a necessary part of a drainage system.

A. 3, 4 & 5

B. 1, 2 & 5

C. 2, 3 & 5

D. 1, 3 & 4

C. 2, 3 & 5

• Drains can have 1% slope

• House drains and building sewer are almost synonymous.

What is the minimum volume of water an

interior wet standpipe should provide?

A. 50 gpm

B. 75 gpm

C. 100 gpm

D. 47.5 gpm

A. 50 gpm

What kind of valve is actuated by a stew and

hand wheel suited for installation that balls

for throttling? It affords greater resistance to

flow than the gate valve because of changes

in flow directions.

A. Stop

B. Float

C. Angle

D. Globe

D. Globe

Expansion joints shall be acceptable except

in piping for __________.

A. cold water

B. hot water

C. vents

D. steam

C. vents

Expansion joints are installed in a piping system to absorb vibration and shock.

The principal pipe of a system of continuous

piping of which branch connections can be

made is called, _________.

A. Riser

B. Horizontal Branch

C. Lateral

D. Main

D. Main

The average area coverage for one (1)

sprinkler head is __________.

A. 9 SQ.M

B. 12 SQ.M

C. 7.5 SQ.M

D. 6.6 SQ.M

A. 9 SQ.M

Which of the following materials is NOT

recommended for water supply system

applications?

A. Concrete Pipes

B. PPR Pipes

C. Brass Pipes

D. G.I. Pipes

A. Concrete Pipes

In Figure 5, identify the part numbered 14?

A. Stack vent

B. Vent stack

C. Main vent

D. Dry vent

B. Vent stack

The part of the lowest horizontal piping or a

plumbing system which receives the

discharge from soil, waste and other

drainage wastes inside the building and

conveys it to the house sewer is a _________.

A. vertical drain

B. house drain

C. soil pipe

D. storm drain

B. house drain

A term applied to those portions of a

plumbing system which have ben installed

and approved prior to contemplated

additions, alterations or correction, is called

_______________.

A. previous work

B. existing installation

C. existing work

D. as-built installation

C. existing work

What is that principal vent pipe of a system

to which vent connections can be made?

A. Vent-thru-roof

B. Vent stack

C. Main vent

D. Vent system

C. Main vent

Which of the following does NOT belong to

the group?

A. float valve

B. fire hose valve

C. Siamese connection

D. Fire hose Cabinet

A. float valve

Everything else belong to fire prevention. Float valves are used in tanks.

What is the minimum flow pressure in psi for

a flush valve water closet?

A. 8

B. 15

C. 10

D. 12

B. 15

103.5 KPa

1 PSI = 6.9 KPa

What is a valve which regulates water

pressure from the water main?

A. Pressure Suction Valve

B. Pressure Separating Valve

C. Pump Suction Valve

D. Pressure Sustaining Valve

D. Pressure Sustaining Valve

What is a contraption invented to dispose

leftovers straight from the kitchen sink?

A. Left-Over Chopper

B. Garbage Collector

C. Waste Grinder

D. Garbage Disposer

D. Garbage Disposer

Which of the following flow of water supply

from any source other than its own?

A. Drain Flow

B. Surface Drain

C. Back Flow

D. Rain Flow

C. Back Flow

What is a result of minus pressure in the

drainage system?

A. Siphonage

B. Capillary action

C. Evaporation

D. Back pressure

A. Siphonage

One important component of plumbing

system that every building should have is a

________.

A. Stack Vent

B. P-trap

C. Vent stack

D. House Trap

D. House Trap

What is the recommended size of service

pipe approved by MWSS for a 2 storey

residential house?

A. 1” Ú (25 mm ∅)

B. 3/4” Ú (19 mm ∅)

C. 1/2” ∅ (12 mm Ú)

D. 1 1/4” ∅ (32 mm Ú)

B. 3/4” Ú (19 mm ∅)

What is the number of days abandonment of

stoppage of work for a building/plumbing

permit to expire?

A. 360 days

B. 240 days

C. 180 days

D. 120 days

D. 120 days

What is a vent connecting one or more

individual vents with a vent stack or stack

vent?

A. loop

B. circuit

C. common

D. branch

D. branch

Calculate the total fixture unit of an 18 storey

dormitory building with 6 bathroom group

on every floor with class-2 residential? (Use:

Table 5-1)

A. 763

B. 864

C. 756

D. 765

B. 864

16 fls x 6 bthrmgrp/flr x 8 FU/bthrmgrp

What is the system which water is

distributed from the normal water pressure

coming from public water main, for low rise

and high rise buildings?

A. Gravity System

B. Vertical Feed System

C. Positive System

D. Upfeed System

D. Upfeed System

What is the FU. of 10 hospital private rooms

using class-2 bathroom group? (Use: Table 51).

A. 50

B. 70

C. 40

D. 80

D. 80

Which of the following is a violation or in contrast with basic plumbing principles?

A. the system shall be maintained in a sanitary and serviceable condition.

B. water closet may be located in unlighted or unventilated room

C. all premises intended for human habitation shall be provided with ample and wholesome amount of water

D. the fixtures shall be designed to use minimum amount of water for flushing

B. water closet may be located in unlighted or unventilated room

Which in the list is NOT a standard

commercial size of G.I. pipe for water supply?

A. 3/8” ∅

B. 1” ∅

C. ¾” ∅

D. ½” ∅

A. 3/8” ∅

What is the size of a downspout if the rainfall

intensity on 200 mm (8”) if the deck roof is

102 m2? (Use: Table P02)

A. 75 mm

B. 100 mm

C. 90 mm

D. 150 mm

C. 90 mm

What commonly used material for soil, waste

and vent installation of high compressive

strength but low tensile strength?

A. cast iron pipe

B. PVC pipes

C. clay pipes

D. HDPE pipes

A. cast iron pipe

In Figure 3: What is the part of a trap

numbered 3.

A. Dip

B. Liquid Seal

C. Liquid Barrier

D. Odor Barrier

A. Dip

A device in plumbing system used to prevent

the passage of sewer gas is called ________.

A. Bend

B. Trap

C. Trap Seal

D. Elbow

B. Trap

Trap is the whole contraption

Trap seal is the part of a trap that prevents gases from coming back.

What is a water tight receptacle which

receives the discharge of plumbing waste for

individual house?

A. Catch Basin

B. Septic Tank

C. Manhole

D. Gess pool

B. Septic Tank

A joint made by firmly packing with oakum

and filled with molten lead to a depth of not

less than one inch is _________.

A. sealing

B. pipe jointing

C. tightening

D. caulking

D. caulking

Installation of all parts of plumbing system

or a particular unit that can be completed

before the installations of fixtures is called

_________.

A. Plumbing system

B. Installation system

C. Roughing-in

D. Water system

C. Roughing-in

What are the two types of water pump

commonly used for water distribution in

building?

1. Piston Pump

2. Centrifugal Pump

3. Single Action Pump

4. Double Action Pump

A. 2 & 3

B. 4 & 1

C. 1 & 2

D. 3 & 4

C. 1 & 2

Identify the part numbered 3 in Figure 2.

A. Fixture Supply

B. Fixture Pipe

C. Water Supply

D. Fixture Unit

A. Fixture Supply

From where is surface water for domestic

use collected?

A. Streams

B. Mountains

C. Seas

D. Oceans

A. Streams

A residence of 12 family members requires

3.6 cu.m. of cold water daily with peak

demand. What is the maximum hot water

potable hourly demand?

A. 120 liters

B. 100 liters

C. 110 liters

D. 140 liters

A. 120 liters

To determine the maximum hot water potable hourly demand, we need to consider the peak demand for hot water usage.

Daily cold water requirement: 3.6 cubic meters (3600 liters) for 12 family members. Typically, about 30-40% of total daily water usage is hot water. To calculate the hourly demand, we assume the peak hourly usage is during a few hours of the day, typically in the morning and evening.

Assuming 35% of daily water usage is hot water: 0

.35×3600 liters=1260 liters/day
For hourly peak demand, we assume the peak usage period is around 2 hours per day: 1260 liters/2 hours=630 liters/hour From the provided options, considering typical usage patterns and reasonable estimates, the best fit for maximum hot water potable hourly demand in a residence of 12 family members is:

A. 120 liters

The portion of rainfall or other precipitation

which runs-off over the surface after the

storm and for such a short period following

a storm as flow exceed the normal run off is

known as?

A. Surface water

B. Storm water

C. Non potable water

D. Waste water

B. Storm water

What is a pipe usually 1.5 M long having a

bell and spigot end?

A. cast iron

B. vitrified clay

C. PVC

D. Asbestos

A. cast iron

All gases formed in the septic tank are

discharged in the atmosphere by means of

_____________.

A. aeration

B. evaporation

C. ventilation

D. sedimentation

C. ventilation

What is a pipe that carries rain or storm

water down a gutter or a roof drain?

A. Spout

B. Leader

C. Strainer

D. Elbow

B. Leader

What is water equipment used whenever the

water supply at its natural pressure cannot

be directly piped to a building, tank or

reservoir?

A. Submersible Pump

B. Centrifugal Pump

C. Pressure Tank

D. Booster Pump

D. Booster Pump

In Figure 3, what influence the depth of the

water in the trap numbered 2?

A. Dip

B. Crown weir

C. Liquid seal

D. Liquid Barrier

C. Liquid seal

What determines the sizes of vertical and

horizontal drainage pipes?

A. Type of building

B. Location of Fixtures

C. Total Fixture Units

D. No, of Bathroom Installed

C. Total Fixture Units

What is a G.I or PPR fitting which is used

when a pipe has already been installed but

dismantling is difficult?

A. Combination

B. Expander

C. Union

D. Double

C. Union

What is the minimum plumbing permit

charge for one “unit”?

A. P10.00

B. P5.00

C. P7.00

D. P15.00

B. P5.00

In order to make water potable, the

procedure to use is ___________.

A. Aeration

B. Chlorination

C. Filtration

D. Using zeolite

B. Chlorination

What is the cause of objectionable tastes and

odour of water?

A. Algae

B. Oxygen

C. Nitrogen

D. Mineral

A. Algae

The MOST common source of large water

supply for cities are the following:

1) Surface Water

2) Aquifer

3) Ground Water

4) Dams

5) Rain Water

A. 1 & 3

B. 1 & 2

C. 2 & 4

D. 3 & 5

A. 1 & 3

In the Sanitary Drainage System, what is

Black Water?

A. sewage coming from factory machineries

B. sewage that includes human waste

C. sewage coming from septic tank

D. sewage that includes oil waste

Traps are usually located within ________ from

the fixture.

A. 30 inches

B. 1 foot

C. 18 inches

D. 2 feet

D. 2 feet

0.6 meters

What is a vertical pipe to convey soil and

waste matters?

A. Drain pipe

B. Conductor. Leader or downspout

C. Vent Pipe

D. Soil Pipe

D. Soil Pipe

The commonly used water treatment in

purifying water is:

A. Absorption

B. Siltation

C. Filtration

D. Chlorination

D. Chlorination

Which of the following is NOT a plumbing

fixture?

A. Water Closet

B. Lavatory

C. Urinal

D. Water Heater

D. Water Heater

What should be done before working with

lead that is wet?

A. Pre-heat it

B. Use blower

C. Use drier

D. Wipe it

D. Wipe it

What is that cylindrical reservoir usually of

metal that can be used by the Fire Dept. in

case of fire?

A. Water Tank

B. Hydrant

C. Stand Pipe

D. Upfeed Pipe

B. Hydrant

What is a water tight receptacle that receives

sewage?

A. Septic Tank

B. Drainage Manhole

C. Cistern

D. Plain faucet

A. Septic Tank

What is a group of two or more similar

adjacent fixture which discharges to a

common horizontal waste or soil branch?

A. Battery of Fixtures

B. Alignment of Fixtures

C. Fixtures Grouping

D. Series of Fixtures

A. Battery of Fixtures

What is the other name of a house drain?

A. Shower Drain

B. Floor Drain

C. Fixture Drain

D. Building Drain

D. Building Drain

What kind of valve is used for flushing water

closets and similar fixtures?

A. Foot valve

B. Angle valve

C. Float valve

D. Flush valve

D. Flush valve

In Figure 6, what is the part of Septic Tank

numbered 7?

A. Sludge

B. Floating Solids

C. Scum

D. Floating Excreta

C. Scum

A vertical pipe that is a continuation of the

drain to which the vent connects is a

____________.

A. continuous drain

B. stack vent

C. continuous vent

D. main vent

C. continuous vent

What is the color coding for a non-potable

water pipe?

A. grey

B. blue

C. green

D. orange

A. grey

How many female office employees are

suited for 5 lavatories? (Use: table 4-1)

A. 200

B. 120

C. 240

D. 150

A. 200

= 5 X 40 = 200

Which of the vent pipes is the principal vent?

A. Vent Stack

B. Stack Vent

C. Vent Thru-Roof

D. Main Vent

D. Main Vent

A pipe or conduit used for carrying sewage

and liquid waste, is called _________.

A. Sewer Pipe

B. Drainage Pipe

C. None of the options

D. Sewage Pipe

A. Sewer Pipe

Which of the following is a violation or in contrast with basic plumbing principles? (Select 2).

a. Water Closet maybe located in unlighted or unventilated room.

b. The system shall be maintained in a sanitary and serviceable condition.

c. All premises intended for human habitation shall be provided with ample and wholesome amount of water.

d. The fixtures shall be designed to use minimum amount of water for flushing.

A. b and c

B. a and b

C. d and a

D. c and d

C. d and a

Piping installed in a straight line, vertically,

horizontally, or at given angle, is called

_________.

A. None of the three

B. Pipe line

C. Pipe Alignment

D. Pipe Installation

B. Pipe line

What is water NOT suitable for drinking but

suitable for irrigation, flushing toilets, urinal,

etc.?

A. Non-potable

B. From creeks

C. Bottled

D. From Rivers

A. Non-potable

What is the minimum size of a water supply

pipe for a flush valve wall hung type urinal?

A. ¾ inch

B. 1 inches

C. 5/8 inches

D. 3/8 inches

A. ¾ inch

How many fixture units (FU) are along Line

2?

A. 30

B. 26

C. 25

D. 28

B. 26

WC – 4(6)

FD – 2(1)

FU = 26

How many fixture units (FU) are along Line 3?

A. 18

B. 22

C. 24

D. 20

D. 20

LAV – 4(1)

FD – 3(1)

SS – 1(3)

UR – 2(5)

FU = 20

(is the FD on SS not counted?)

How many fixture units (FU) are along Line4?

A. 9

B. 16

C. 23

D. 8

A. 9

SS – 1(3)

FD – 3(1)

LAV – 4(1)

FU = 10

What is the pipe diameter of pipe along Line5?

A. 5”∅

B. 6” ∅

C. 4” ∅

D. 3” ∅

C. 4” ∅

FD – 2(1)

WC – 4(6)

FU = 26

What is the total number of floor drains per

Floor?

A. 12

B. 18

C. 24

D. 10

D. 10

FD = 2 + 3 + 3 + 2 = 10

How many Wye 4” x 2” are needed per Floor?

A. 18

B. 20

C. 22

D. 16

B. 20

Y = 8 + 8 + 2 + 2

These are connections of Lavatory and Floor Drains. Water closets and Urinals uses Wye 4” x 4”

In Figure No. 4, what is part numbered 6?

A. Stop Cock

B. Ball Valve

C. Stop Valve

D. Gate Valve

C. Stop Valve

In Figure No. 4, what is part numbered 7?

A. Metering

B. Water Usage Meter

C. Water Metering Device

D. Water Meter

D. Water Meter

In Figure No. 4, what is part numbered 8?

A. Stop Valve

B. Check Valve

C. Ball Valve

D. Gate Valve

D. Gate Valve