Unit Review : Plumbing & Auxiliaries Comprehensive Self-Assessment

Question 1

1.	Plumbing codes limit the highest water pressure allowed in plumbing systems to;
A.	450 kPa (65 psi)
B.	550 kPa (80 psi)
C.	350 kPa (50 psi)
D.	250 kPa (36 psi)
E.	150 kPa (22 psi)

Answer 1

B. 550 kPa (80 psi)

Question 2

2. Most plumbing fixtures need a minimum of \_\_\_\_\_ water flow pressure.
A. 90 kPa (14 psi)
B. 100 kPa (14.5 psi)
C. 110 kPa (15 psi)
D. 120 kPa (17.5 psi)
E. 130 kPa (19 psi)

Answer 2

C. 110 kPa (15 psi)

Question 3

3. Most municipal water systems distribute water at pressures between:

A. 350 kPa (50 psi) and 420 kPa (60 psi)
B. 250 kPa (36 psi) and 320 kPa (46 psi)
C. 150 kPa (22 psi) and 220 kPa (32 psi)
D. 450 kPa (65 psi) and 520 kPa (75 psi)
E. 550 kPa (80 psi) and 620 kPa (90 psi)

Answer 3

A. 350 kPa (50 psi) and 420 kPa (60 psi)

Question 4

4. The pressure in the building plumbing system should not drop below _____ at any
   location.

A. 150 kPa (22 psi)
B. 175 kPa (25 psi)
C. 250 kPa (36 psi)
D. 300 kPa (44 psi)
E. 200 kPa (29 psi)

Answer 4

B. 175 kPa (25 psi)

Question 5

5. Hot water between _____ is used for domestic purposes in the building.

A. 60°C (140°F) and 70°C (158°F)
B. 40°C (104°F) and 50°C (120°F)
C. 80°C (176°F) and 90°C (194°F)
D. 70°C (158°F) and 80°C (176°F)
E. 50°C (120°F) and 60°C (140°F)

Answer 5

E. 50°C (120°F) and 60°C (140°F)

Question 6

6. The pressure relief valve on a hot water heater is designed to open when the
   pressure reaches the design working pressure of the tank typically:

A. 100 kPa (14.5 psi)
B. 103 kPa (15 psi)
Book 2 PanGlobal Page 78
C. 1100 kPa (156 psi)
D. 150 kPa (22 psi)
E. 1034 kPa (150 psi)

Answer 6

E. 1034 kPa (150 psi)

Question 7

7. The deep trap has _____ of maintaining the seal.

A. 16 mm (5/8 in)
B. 5 cm (2 in)
C. 38 mm (1-1/2 in)
D. 10 cm (4 in)
E. 75 mm (2-15/16 in)

Answer 7

D. 10 cm (4 in)

Question 8

8. Most plumbing regulations prohibit single pipe systems over _____ in length from
   a water heater.

A. 60 m (200 ft)
B. 40 m (130 ft)
C. 10 m (33 ft)
D. 20 m (66 ft)
E. 30 m (100 ft)

Answer 8

E. 30 m (100 ft)

Question 9

9. Fusible plugs are made of materials that melt at a temperature of:

A. 99°C (210°F)
B. 150°C (300°F)
C. 125°C (260°F)
D. 225°C (440°F)
E. 90°C (194°F)

Answer 9

A. 99°C (210°F)

Question 10

10.A water closet flush valve discharges approximately _____ of water in ten seconds.

A. 18.4 L (4.87 US gallons)
B. 15.5 L (4.10 US gallons)
C. 1L (2.78 US gallons)
D. 5.8 L (1.53 US gallons)
E. 13.7 L (3.62 US gallons)

Answer 10

D. 5.8 L (1.53 US gallons)

Question 11

11.Horizontal branch piping 76 mm (3 in) or less in diameter should have a minimum
gradient of _____ toward the stack.

A. 5 cm/m (5/8 in/ft)
B. 1 cm/m (1/8 in/ft)
C. 2 cm/m (1/4 in/ft)
D. 4 cm/m (1/2 in/ft)
E. 3 cm/m (3/8 in/ft)

Answer 11

C. 2 cm/m (1/4 in/ft)

Question 12

12.Horizontal branch piping larger than 76 mm (3 in) should be installed with a slope
of not less than:

A. 5 cm/m (5/8 in/ft)
B. 4 cm/m (1/2 in/ft)
C. 2 cm/m (1/4 in/ft)
Book 2 PanGlobal Page 79
D. 1 cm/m (1/8 in/ft)
E. 3 cm/m (3/8 in/ft)

Answer 12

D. 1 cm/m (1/8 in/ft)

Question 13

13.Gutters are used to convey rainwater from a horizontal or sloping roof to a vertical
pipe called a:

A. Leander
B. Downspout
C. Down comer
D. Down leader
E. Drain

Answer 13

B. Downspout

Question 14

14.Grease that drains from kitchen fixtures should be removed by passing the water
through a:
A. Heat exchanger
B. Filter
C. Degreaser
D. Closed bucket
E. Grease trap

Answer 14

E. Grease trap