Master Plumber 2025 - Weekly Test 2 Plumbing Code

3.965 BTU

1 Kcal is how many BTU? (standard conversion)

4184 Joule

1 Kcal is how many in Joule?

4.184 KJoule

1 Kcal is how many in KJoule?

evaporative cooler

Which of the following can be drained through an air break?

airgap

all food equipment such as cold storage room, refrigerator, cooling counter, compartment for storage or holding of food or drink, dishwashing or culinary sink must discharge through an _________.

3 m

Water pipe joints shall be installed not less than ___ away from sewer line in both directions.

2"-9"

What is the allowed depth of shower dam or threshold?

Manually-Operated Standpipe System

A standpipe having a remote control device at each hose station.

Wet Standpipe

A standpipe where water pressure is maintained at all times

Automatic Standpipe System

A standpipe that operates automatically by opening a hose valve

Dry Standpipe

A standpipe having no permanent water inside the pipe

6 FU

Clotheswashers in groups of 3 or more shall be rated at _____ each for the common horiontal and vertical waste pipe sizing.

0 to 63.5 cm

Airgap less than 25 mm shall only be approved as a permanent part of a listed assembly that has been tested under actual backflow conditions with vacuums from _____ of mercury.

30

1 Water Closet and 1 Urinal must be provided for temporary workingmen facilities for each ____ workmen.

Atmospheric Vacuum Breaker (AVB)

Backflow prevention device for a hose bibb; Consists of a body, a checking member, and an atmospheric opening

PD 856

Code on Sanitation of the Philippines

RA 9514

Fire Code of the Philippines

RA 8749

Philippine Clean Air Act

RA 8495

Philippine Mechanical Engineering Act of 1998

14 TPI

Threads per inch for pipe size of 13 mm diameter.

18 TPI

Threads per inch for pipe size of 1/4" to 3/8"

11-1/2 TPI

Threads per inch for pipe size of 1" to 2"

8 TPI

Threads per inch for pipe size of 2-1/2" and above

plumbing fixtures are installed

Every building where _____ shall have a sewer service connection to a public or private sewer systems.

11

Water Closet provision for 300 females in Assembly Places for Public Use

61 m

The public sewer may be considered not being available when a sewer is located more than _____ from any proposed building or exterior drainage facility.

91 m

maximum distance between manholes

38 mm. O.D.

Each tailpiece, continuous waste or waste and overflow shall not be less than ___ for sinks, dishwashers, laundry tubs bathtubs, urinals and similar fixtures.

32 mm O.D.

Size for lavatories, drinking fountains, and similar small fixtures

Bitumen

Voids between pipes and sleeves through concrete floors in the ground shall be appropriately sealed with _____.

Embedded metal pipe sleeves

protection from breakage for piping passing under or through walls

Polyethylene sheath

protection from external corrosion for pipes passing through or under cinders or other corrosive materials

Metal sleeve

for pipes directly embedded in concrete and masonry walls

135°

An additional cleanout shall be provided on a horizontal line with an aggregate offset angle of direction exceeding _____.

72° or less

Cleanouts may be omitted on short horizontal drainage pipe installed at ___________ from the vertical line

8

Threads per inch of a 64 mm cleanout size

11-1/2 TPI

Threads per inch of a 38mm - 51 mm cleanout size

1033 kpa (or 150 psi)

Each pressure relief valve shall be an approved automatic type with drain and set at a pressure not more than _____.

50

1 Laundry Tray must be provided per ____ persons.

3

WSFU of a private hose bibb

5

WSFU of Public Hose Bibb or Sill Cock

2.5

WSFU of Water Closet (economical flush)

10

WSFU of Urinal pedestal, flushing rim slink

457.2 mm

A _____ diameter circular basin shall be equivalent to 1 lavatory.

609.6 mm

refers to the width of a circular basin that shall be considered equivalent to 1 lavatory

60 FU

How many fixture units is equivalent to a 30 gpm-rated sump?

2 FU

How many FU shall be allowed for every 0.063 L/s of flow, or 1 gpm?

216

What is the Maximum DFU loading of a 102 mm branch? (for Branch or Horizontal Pipe)

256

Maximum DFU loading for 102 mm Stack (or vertical pipe)

600

Maximum DFU loading for 600 mm Stack (or vertical pipe)

1380

Maximum DFU loading for 152 mm Stack (or vertical pipe)

Convection

The transference of heat by the upward movement of a warm light air current.

Radiation

the process in which energy in the form of heat is sent through space from atoms and molecules as they undergo internal change.

Conduction

the transference of heat by the passage of energy, particle by particle.

Adsorption

the process by which a solid holds molecules of a gas or liquid or solute as a thin film.

Backwater Valve

A device installed in a drainage system to prevent reverse flow.

Check Valve

a valve that automatically closes to prevent the flow of liquid or gas in a reverse direction

Ball Cock

a valve opened and closed by the fall and rise of an attached ball floating on the surface of the liquid.

Sump

receives sewage or wastewater and below the normal grade of the gravity system

Bathtub

A fixture allowed to omit a cleanout on a horizontal line less than 1.5 m in length is _____.

(Cleanouts may be omitted on a horizontal drain line less than 1.5 m in length unless such line is serving sinks or urinals.)

Red with White Lettering

(ANSI) Pipe Color code for Fire Quenching

Orange with Black Lettering

(ANSI/ASME) Pipe Color code for Toxic or Corrosive liquids, acids (Nitric Acid)

19 mm

What is the minimum supply size for a urinal stall?

2 pipe sizes; largest side inlet

Vertical installation of double sanitary tees may be used when the barrel of the fitting is at least _____ larger than the _____ inlet.

13 mm or 1/2" rod size

Hanger rod size for 5" to 8" pipe size

3/8" rod size

Hanger rod size for 1/2" to 4" pipe

5/8" rod size

Hanger rod size for 10" to 12" pipe size

4

What is the maximum Fixture Unit (FU) loading of a 51 mm trap?

1

What is the maximum Fixture Unit (FU) loading of a 32 mm trap?

3

What is the maximum Fixture Unit (FU) loading of a 38 mm trap?

6

What is the maximum Fixture Unit (FU) loading of a 76 mm trap?

8

What is the maximum Fixture Unit (FU) loading of a 102 mm trap?

1" or 25.4mm

Linings for showers shall not be nailed or perforated at any point less than _____ above the finished dam or threshold.

76 mm or 3"

Dimension that refers to extension of lining materials above the top of the finished dam or threshold of a shower

101 mm (or 4")

Dimension that refers to extension of folds, laps, and reinforcing webbing in all directions from the corner in a shower sub-pan

Black Steel Pipe

Preferred pipe for transporting gas; Not suitable for water because it tends to erode more easily

Galvanized Pipe

Suitable pipe material for water supply in old houses

Concrete Pipe

Suitable pipe material for sanitary, storm sewers, and culverts

Cast Iron Soil Pipe

Suitable pipe material for drainage

127 mm branch

Minimum pipe sizing for a branch serving a 400 DFU; Can serve up to 428 DFU

152 mm branch

This branch can serve up to 720 DFU

102 mm branch

This branch can serve up to 216 DFU

203 mm branch

This branch can serve up to 2640 DFU

2112

What is the maximum fixture loading of a 8" pipe sloped at 1%?

(For 1% slope, multiply horizontal fixture units by a factor of 0.8.)

Bitumastic coating

Copper tubing shall be fully externally protected with a/an _____ and fiberglass wrapping installed inside a split rigid casing whenever installed underground.

150 mm above ground

Galvanized wrought iron or galvanized steel pipe shall be kept _____.

300 mm below ground

Vitrified clay pipes must be kept _____.

0.2%

Potable water shall use solders and fluxes with a lead content not exceeding _____.

8%

maximum lead content allowed in water pipes and fittings

White

Color of Steam Division - High Pressure Pipe

Buff

Color of Steam Division - Exhaust System

(Amended NBC has a different color for High Pressure Steam (Yellow). The answer might depend on the choices given. Most probably, the examiner will base on the old NBC since the questions are included in a Question Bank.)

38 mm

Trap arm size of Laundry Tub

32 mm

Trap arm size of wash basin (lavatory) single, dental units or cuspidor

51 mm

Trap arm size of floor drains, grease interceptors, showers, etc.

76 mm

trap arm size of water closet

last valve; 152 mm

AVBs of inlets to tanks, vats, sumps shall be installed in the discharge side of the _____ with the critical level not less than _____ above flood level rim.

305 mm

A double check valve backflow preventer requires _____ minimum clearance at the bottom for maintenance.

80 psi (or 551 kpa)

A pressure regulator must be installed if the local water service pressure is above ____

103 kpa (or 15 psi)

this refers to the minimum water pressure, otherwise a tank or a booster pump must be installed

Silver Brazing

Medical gas piping is most often joined by _____.