Book 2: Unit 2 - Review:

Question 1

A water closet flush tank operates by means of two valves, one is the float-controlled valve (ball cock or float valve) that:
Select one:

A. Opens to flush the bowl

B. Opens to drain the tank

C. Opens to fill the tank

D. Closes to drain the tank

E. Closes to fill the bowl

Answer 1

C. Opens to fill the tank

Question 2

An air gap is a physical separation between the free flowing discharge end of a potable water pipe and an open or non-pressure receiving vessel such as a:
Select one:

A. Sink or a bathtub

B. Process vessel

C. Storage tank

D. Mixing vat

E. Boiler

Answer 2

A. Sink or a bathtub

Question 3

Wastes from plumbing fixtures, such as sinks, are discharged through the fixture outlet pipe and P-trap then passes into a:
Select one:

A. Vertical branch

B. Horizontal Line

C. Horizontal stack

D. Horizontal branch

E. Vertical stack

Answer 3

D. Horizontal branch

Question 4

Water may leak from the flush valve of a water closet flush tank for the following reasons except:
Select one:

A. The flush seat might be corroded or worn

B. The ball could be defective

C. The lift chain could be properly adjusted

D. There might be dirt on the ball or the seat

E. The flush ball might not be seating properly

Answer 4

C. The lift chain could be properly adjusted

Question 5

All horizontal piping should have an adequate slope and size to maintain a minimum flow velocity of _____ so that the solids are always kept in suspension, thereby preventing pipe blockage.
Select one:

A. 0.3 m/s (1 ft/sec)

B. 0.1 m/s (0.3 ft/sec)

C. 0.5 m/s (1.6 ft/sec)

D. 0.6 m/s (2 ft/sec)

E. 0.8 m/s (2.6 ft/sec)

Answer 5

D. 0.6 m/s (2 ft/sec)

Question 6

The material used for indoor sanitary drainage piping in single family dwellings is:
Select one:

A. PVC plastic

B. Galvanized steel

C. Cast iron

D. Copper

E. ABS plastic

Answer 6

E. ABS plastic

Question 7

Water hammer noise is a pounding or banging of pipes and shuddering of fixtures, caused by a shock wave that results when the water flow in a pipe is:
Select one:

A. Suddenly started

B. Slowly stopped

C. Suddenly stopped

D. Slowly started

E. Suddenly heated

Answer 7

C. Suddenly stopped

Question 8

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

A. 175 kPa (25 psi)

B. 150 kPa (22 psi)

C. 200 kPa (29 psi)

D. 300 kPa (44 psi)

E. 250 kPa (36 psi)

Answer 8

A. 175 kPa (25 psi)

Question 9

Fusible plugs are made of materials that melt at a temperature of:
Select one:

A. 90°C (194°F)

B. 99°C (210°F)

C. 125°C (260°F)

D. 225°C (440°F)

E. 150°C (300°F)

Answer 9

B. 99°C (210°F)

Question 10

One of the methods employed to prevent backflow and control the cross connections is the:
Select one:

A. Atmospheric valve breaker

B. Temperature vacuum breaker

C. Air gap

D. Reduced temperature principal device

E. Double check breaker

Answer 10

C. Air gap

Question 11

The standard or common trap has _____ of maintaining the seal.
Select one:

A. 16 mm (5/8 in)

B. 38 mm (1-1/2 in)

C. 75 mm (2-15/16 in)

D. 10 cm (4 in)

E. 5 cm (2 in)

Answer 11

B. 38 mm (1-1/2 in)

Question 12

One of the methods employed to prevent backflow and control the cross connections is the:
Select one:

A. Atmospheric vacuum breaker

B. Temperature vacuum breaker

C. Double check breaker

D. Reduced temperature principal device

E. Air globe

Answer 12

A. Atmospheric vacuum breaker

Question 13

One of the methods employed to prevent backflow and control the cross connections is the:
Select one:

A. Double check breaker

B. Temperature vacuum breaker

C. Atmospheric valve breaker

D. Reduced pressure principal device

E. Air globe

Answer 13

D. Reduced pressure principal device

Question 14

Soil and waste material are moved through the drainage piping with the help of:
Select one:

A. Water

B. Steam

C. Oil

D. Grease

E. Air

Answer 14

A. Water

Question 15

The deep trap has _____ of maintaining the seal.
Select one:

A. 10 cm (4 in)

B. 5 cm (2 in)

C. 16 mm (5/8 in)

D. 75 mm (2-15/16 in)

E. 38 mm (1-1/2 in)

Answer 15

A. 10 cm (4 in)

Question 16

The reduced pressure principal device consists of two independently acting check valves with an automatic operating _____ valve located between the two check valves.
Select one:

A. Pressure differential relief

B. Pressure

C. Pressure reducing

D. Temperature differential relief

E. Pressure increasing

Answer 16

A. Pressure differential relief

Question 17

When the lowest drain in a building (such as in a sub-basement), is below the level of the municipal sewer line, a sump must be provided to collect and _____ the liquid sewage into the sanitary building drain.
Select one:

A. Raise

B. Float

C. Pump

D. Elevate

E. Lift

Answer 17

E. Lift

Question 18

Wastes from plumbing fixtures, such as sinks, are discharged through the fixture outlet pipe into a:
Select one:

A. P-trap

B. C-trap

C. B-trap

D. S-trap

E. X-trap

Answer 18

A. P-trap

Question 19

The main function of a storm water drainage system is to remove storm water and to provide _____ drainage into a storm sewer.
Select one:

A. Parking lot

B. Roof

C. Surface

D. Sanitary

E. Sub-surface

Answer 19

E. Sub-surface

Question 20

The float rod should be adjusted so that it will close the inlet valve and shut off the water about _____ from the top of the overflow pipe.
Select one:

A. 6.4 mm (1/4 in)

B. 12.7 mm (1/2 in)

C. 19.1 mm (3/4 in)

D. 25.4 mm (1 in)

E. 31.7 mm (1 1/4 in)

Answer 20

D. 25.4 mm (1 in)