WT 6

50問 • 2ヶ月前

問題一覧

A pH below 7 indicates _____.

Acidic

Suspended solids are removed from the water by gravity settling and deposition

Sedimentation

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

What might be the reason why riprap is placed at the end of a storm drainage pipe?

to dissipate the energy of water

Size of downspout for a 350sqm roof area in a place with prevalent rainfall rate of 102 mm.

102 mm

The hot water system that is an efficient type, generally used in building of extreme heights.

Overhead Feed and Gravity Return System

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

The type of valve incorporated in corporation stop.

Gate Valve

This level of water supply is also referred as communal faucet system.

Level 2

The distance between a water heater and the union on the water lines shall not be more than _____.

12"

What is the purpose of a weir outlet?

To control the overflow of stormwater

What is a treatment for water acidity?

Passing through marble filter

The minimum size of a water service pipe is _____.

19 mm

When copper and steel contact each other, especially when dampness is present, a chemical action called _____ occurs.

Electrolysis

Water Code of the Philippines

PD 1067

The presence of ____ causes bad taste and odor in water.

Algae

Water above the filter sand that provides hydraulic head for the process

Supernatant

Filtration through activated carbon purifier filtration is a correction for the presence of _____ in the water.

Taste or Odor

In areas with high rainfall intensity, which driveway material can be prone to flash flood?

asphalt

85 Kpa = _____ feet

Water for domestic use comes from these source except _____.

sea water

The pressure required to test water piping.

150% working pressure

A sanitary sewer that conveys sanitary waste to a dispersal plant.

Intercepting Sewer

It refers to the transmission of pathogens through vehicles such as water, food, and air.

Vehicle

The dip tube on a cold-water supply should terminate _____ above the bottom of the tank.

8''

The water which comes from lavatories, floor drains, laundry tubs is referred to as _____.

Grey Water

Water Quality Guidelines and General Effluent Standards of 2016

DENR AO 2016-08

Water connection size for flushometer-tank WC

10 mm

DFU of Urinal stall, separate trap

Which process is mostly associated with purification of water?

Evaporation

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

Characterized by a low Reynold number. This occurs when the fluid flows in infinitesimal parallel layers with no disruption between them.

Laminar Flow

The smallest diameter pipe that can be installed in a DWV system is _____.

1 1/4"

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

Heat transfer occurs through electromagnetic waves without involving particles.

Radiation

ASTM of PVC Sewer Pipe and Fittings

ASTM D2729

The following are physical traits of water except _____.

Dissolved Oxygen

Hot water consumption for factories

4 to 6 gpph

Most practical pump used for hot water system

Centrifugal Pump

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

The method used for transferring heat in a gravity domestic hot-water circulation system.

Convection

Where is a stormwater outfall typically found?

rivers

Hepatitis B can be transmitted through _____.

Body Fluid Contact

What is the area called "zone of saturation" in a well?

the area below the water table

Refers to the maximum and minimum pressure at which proper function of the water supply system can be maintained.

Critical Pressure

This tank holds a salt solution that flushes the mineral tank, replacing calcium and magnesium ions with sodium.

Brine Tank

Agency that set the criteria for the quality of drinking water from meteoric surface or underground sources.

National Standards for Drinking Water

A well dug with the use of earth augers

Bored well

It is used for measuring pore water pressures. It is also used to measure underground water pressure.

piezometer

The transition from the solid phase to the gas phase without passing through an intermediate liquid phase.

Sublimation

YT1 Materials Engineer EXAM

ユーザ名非公開 · 100問 · 2ヶ月前

YT1 Materials Engineer EXAM