Master Plumber Exam Philippines Master Plumber Code and Regulations 2

Question 1

Under the NPCP, what is the minimum slope (grade) required for a 100 mm (4-inch) horizontal drainage pipe?

Accepted Answer

1:100 (1%)

Answer

The NPCP requires a minimum slope of 1:100 (1% or approximately ¼ inch per foot) for 100 mm horizontal drainage pipes.

Question 2

In water supply design for buildings, what is the typical minimum residual pressure at the highest fixture outlet required by the NPCP?

Accepted Answer

70 kPa (10 psi)

Answer

The NPCP requires a minimum residual pressure of 70 kPa (approximately 10 psi) at the highest fixture outlet during peak demand.

Question 3

According to Philippine plumbing standards, what is the correct color coding for a PVC pipe designated for potable water supply?

Accepted Answer

Blue

Answer

PVC pipes for potable water supply are color-coded blue under Philippine National Standards to differentiate them from drainage and other piping systems.

Question 4

What is the required minimum air gap between a water supply outlet and the flood level rim of a fixture, as specified in the NPCP?

Accepted Answer

Twice the supply pipe diameter

Answer

The NPCP requires an air gap of at least twice the internal diameter of the supply pipe, but not less than 25 mm (1 inch).

Question 5

Under the National Building Code of the Philippines (PD 1096) and NPCP, what is the minimum size of the building sewer for a residential structure?

Accepted Answer

100 mm (4 inches)

Answer

The minimum building sewer size for residential structures is 100 mm (4 inches) per the NPCP and related Philippine building standards.

Master Plumber Exam Practice Test

Master Plumber Exam Practice Test

Master Plumber Exam Philippines Master Plumber Code and Regulations 2