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

1:200 (0.5%)

Answer

1:50 (2%)

Answer

1:40 (2.5%)

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

35 kPa (5 psi)

Answer

100 kPa (14.5 psi)

Answer

140 kPa (20 psi)

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

Gray

Answer

White

Answer

Green

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

Equal to the supply pipe diameter

Answer

Three times the supply pipe diameter

Answer

Equal to 25 mm regardless of pipe size

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

75 mm (3 inches)

Answer

150 mm (6 inches)

Answer

200 mm (8 inches)

Question 6

In the NPCP, what is the maximum developed length of a vent pipe from its connection to the drainage system to its termination outdoors for a 50 mm (2-inch) vent?

Accepted Answer

30 m (100 ft)

Answer

15 m (50 ft)

Answer

45 m (150 ft)

Answer

60 m (200 ft)

Question 7

According to the NSCP (National Structural Code of the Philippines) and related plumbing standards, what is the minimum water supply fixture unit (WSFU) demand value for a bathtub with a shower combination?

Accepted Answer

4 WSFU

Answer

2 WSFU

Answer

3 WSFU

Answer

5 WSFU