WEEKLY TEST 6 SPDI
Seznam vprašanj
1
It is used for measuring pore water pressures. It is also used to measure underground water pressure.
piezometer
2
Water Code of the Philippines
PD 1067
3
Water for domestic use comes from these source except _____.
rain water
4
When the well is excavated in the confined aquifer, and the water in the well reach over the water table but not on the surface of the earth. Such a well known as an _____.
Artesian Well
5
The water which comes from lavatories, floor drains, laundry tubs is referred to as _____.
Grey Water
6
Black Water- the wastewater from bathrooms and toilets that contains faecal matter and urine. The smallest diameter pipe that can be installed in a DWV system is _____.
1 1/4"
7
This material is not used in lavatories as water becomes black or brown.
iron
8
A tank made of heavy-duty stainless sheet of diameter varying from 60 to 130 cm and not more than 5 meters long.
Storage Tank
9
ASTM of PVC Sewer Pipe and Fittings
ASTM D2729
10
The potable water system or part thereof shall be filled with water-chlorine solution containing not less than ____ of chlorine and allowed to stand for 3 hours.
200 ppm
11
Heat transfer occurs through electromagnetic waves without involving particles.
Radiation
12
If hot water pipes are insulated, the heat loss from pipes is reduced by up to _____.
80%
13
The method used for transferring heat in a gravity domestic hot-water circulation system.
Convection
14
In areas with high rainfall intensity, which driveway material can be prone to flash flood?
asphalt
15
When copper and steel contact each other, especially when dampness is present, a chemical action called _____ occurs.
Electrolysis
16
Refers to the maximum and minimum pressure at which proper function of the water supply system can be maintained.
Critical Pressure
17
The transition from the solid phase to the gas phase without passing through an intermediate liquid phase.
Sublimation
18
In reverse osmosis process, why is pressure being applied to the water?
to force water through a semipermeable membrane
19
Filtration through activated carbon purifier filtration is a correction for the presence of _____ in the water.
Taste or Odor
20
What is a treatment for water acidity?
Passing through marble filter
21
The following are physical traits of water except _____.
Dissolved Oxygen
22
Most practical pump used for hot water system
Centrifugal Pump
23
This tank holds a salt solution that flushes the mineral tank, replacing calcium and magnesium ions with sodium.
Brine Tank
24
An electric water heater was observed to have reduced heating efficiency. What is the most appropriate maintenance procedure?
remove accumulated sediments and scaling
25
In the installation of a water distribution system with a pump and elevated water tank, which of the following is the most appropriate?
install pump near the discharge of the cistern
26
Water above the filter sand that provides hydraulic head for the process.
Supernatant
27
A well dug with the use of earth augers.
Bored well
28
Which process is mostly associated with purification of water?
Evaporation
29
What is that receptacle installed at corner wall that collect rain water from a balcony?
Scupper drain
30
What can be the effect in the water distribution system, if the pH level is 4-5?
Metal from pipes can leach to the water.
31
A mechanical device used to circulate hot water to the plumbing fixtures. Recommended for large building where difficulty of providing natural circulation of hot water is encountered
Pump Circuit System
32
Water Quality Guidelines and General Effluent Standards of 2016
DENR AO 2016-08
33
What is the purpose of a weir outlet?
To control the overflow of stormwater
34
The minimum size of a water service pipe is _____.
19 mm
35
The distance between a water heater and the union on the water lines shall not be more than _____.
12"
36
Agency that set the criteria for the quality of drinking water from meteoric surface or underground sources.
National Standards for Drinking Water
37
Additional Info: Characterized by a low Reynold number. This occurs when the fluid flows in infinitesimal parallel layers with no disruption between them.
Laminar Flow
38
This level of water supply is also referred as communal faucet system.
Level 2
39
Minimum trap size of bathtub
1 1/2"
40
Pipes installed to provide flow of air to or from drainage system or to provide a circulation of air within such system to protect trap seals from siphonage and backpressure
Vent System
41
What might be the reason why riprap is placed at the end of a storm drainage pipe?
to dissipate the energy of water
42
Using a gas-fired water heater, which of the following is the most important consideration?
proper ventilation and flue
43
What is the area called "zone of saturation" in a well?
the area below the water table
44
The presence of ____ causes bad taste and odor in water.
Algae
45
The hot water system that is an efficient type, generally used in building of extreme heights.
Overhead Feed and Gravity Return System
46
Where is a stormwater outfall typically found?
rivers
47
It refers to the transmission of pathogens through vehicles such as water, food, and air.
Vehicle
48
A sanitary sewer that conveys sanitary waste to a dispersal plant.
Intercepting Sewer
49
Suspended solids are removed from the water by gravity settling and deposition.
Sedimentation
50
The type of valve incorporated in corporation stop.
Gate Valve