PP Pre 2

100問 • 1ヶ月前

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What do you call this valve installed at the suction line of pump to prevent the loss of prime of the pump

Foot valve

Polyvinyl Chloride (PVC) pipes used for drain waste vent (DWV) are manufactures based on the standard set by this organization

ASTM

Water for domestic use comes from these sources except

Sea water

What is the setting height from the floor for wall hung lavatory

22"

How much is the plumbing permit fee for one lavatory in excess of one unit minimum required?

P 6.00

The recommended hot water supply to an hotel washing machine is?

10 GPH

Gasses not found in sewer air of septic tank are

Chloride

What is the setting height from the floor for a water supply inlet of flush tank water closet

A male thread fitting with square head used for closing another female fitting is called

Plug

The recommended hot water supply to a hotel lavatory

5 GPH

Copper pipes are sized

1/8 bigger than their inside diameter

To boost the water pressure of hot water, use

Circulating pump

Which type of wrench is used to assemble hubless joint

Torque wrench

When silt and dirt is removed from water, the process is called

Filtration

The recommended hot water supply is a therapeutic bath?

75 GPH

What is the setting distance from the floor for a bidet waste drain outlet?

12"

Electric water heaters are manufactured based on the standard set by this organization.

Plumbing pipe color coded in Aqua-blue stripe or bar is identified as

Potable water pipe

Stainless steel plumbing fixture are manufactured based on the standard set by this organization

CS AND PS

When a lift check valve is not working properly, what should be done?

Check the lift disk

What is the material applied to a thread of pipe to compensate for workmanship in a screwed joint

Teflon tape

Which of the following type of valve usually operated without manual control?

Check valve

When soldering copper gutters, what is that flux that is generally used

Resin

What is that plumbing devices that prevent the passage of bad odor and gasses from the sewer system to a building?

Trap

What is that device suitable for pumping sewage from the deep basement floor into the sewer line?

Pneumatic ejector

Minor stoppage from water closet traps can be cleared with plunger, but for more stubborn clogs, use

Closet auger

To repair a leaking DWV copper joint, you should

Cut and unscrew at the joint

A storage heater is used when the demand

Has large volume changes

Water like gases solid is composed of small individual parts scientifically referred to as:

Molecule

The most practical circulating pump for use in the hot water system is the type:

Centrifugal pump

In sizing a downspout the deciding factor for its proper size:

All of these

A system of pipes and equipment used exclusively to supply water for extinguishing fire:

Sprinkler system

A device or structure, above or below the ground used for removing soil or colloidal materials of a type that cannot be remove by sedimentation

Filter

Installation of water service must be direct and in short manner a possible turns, or offset elbows should be avoided because the element will incur

Friction losses

Friction in plumbing system will causes losses in pressure in pipe due to

Resistance produce by contact of flowing water and the interior surface of pipe

What is the pipe fitting used in the interconnection of service pipe and insertion to the water main?

Clamp saddle

What is the knockdown coupling like fitting that is specially use and interconnect two water service pipes in place?

Union patent

A pipe fitting with outside thread and projecting square head used for closing the edge of another fitting

Plug

A short pipe with outside thread used for connecting pipe or fitting

Nipple

A nut that is screwed up tightly against another nut to prevent it from becoming loose

Lock nut

The difference between a tube and a pipe is that, tube has relatively thin wall and

The listed size correspond to outside diameter

What do you call the phenomenon causing rumbling sound and severe shock when water flow is halted abruptly by rapid closure of valve or faucet?

Water hammer

What is the level to which water must use in a fixture to overflow without restriction?

Flood level

What is the type of water closet for public use?

Elongated bowl type

Floor drain is always provided with removable strainer, the open are of which is equivalent to afraction of the cross sectional area of the drain pipe

2/3 of the area

A flexible auger is use to remove obstruction that take place in these fittings

Trap way of toilet bowl

The use of compound in screw joint, a dope may applied by plumber for what purpose

To make permanent

In a screwed connection, always begin to screw by hand and make sure the fitting turn readily after the length of approximately

3 threads

The kind of valve installation characterized as to check or prevent reversal of flow in the pipe

Check valve

The type of wrench use for screwing bolt and insert for valve with hexagonal end

Monkey wrench

The type of wrench used in working with plated or high-finish materials and in place with two small to admit pipe wrench

Strap wrench

The explosion of molten lead when pouring into the hub of G.I. pipe when preparing a caulk joint is caused by:

Wet and watery hub end

When making screwed joints in a potable water system, apply sealing compound on

Male thread only

Which flushing action in water closet requires a flushometer?

Blowout

Which type of urinals uses less water than any of the other type?

Washdown

In a solvent-cemented plastic piping system, most leaking joints are caused by a worker’s failure to:

Deburr the inside of the pipe

Which of the following should be used for lubricating during the threading process?

Machine lubricating oil

What is the other name for rain water downspout?

Leader

Which of the following is not a type of water fountain?

Semi-recessed

What is the valve which is an adoption of ball valve?

Plug valve

All of the following are used in a site drainage system EXCEPT:

Roof drains

Subsoil water is collected and carried to a

Sump

Which of the following is not a plumbing fixture?

Booster pump

Which type of lavatories is designed for group use?

Wash fountain

What must be the slope of building drain installation?

1/8-1/4 in/ft

Minor stoppage form water closet traps can be cleared with plunger, but for more stubborn clogs, use

Closet auger

What are references in measuring the depth of a trap seal of the trap?

Crown weir to top dip

Subsoil drains are installed at what level?

Under the basement floor

The prescribe color coding of piping under steam division of a high pressure pipe is

White

What are the most common joints used for brass and steel piping installation?

Screwed and flanged

What is the prescribed color coding of piping under water division of fresh water pipe?

Blue

In large restaurant, the fixture for washing vegetable pan cauldron is the:

Scullery sink

What is that pressure that comes from the amount of air that was drag along with friction by flowing down the wall of the waste stack?

Atmospheric pressure

At the base of a vertical drain, flow enters the horizontal drain at a relatively high velocity, what do you call that flow?

Surging flow

The handicapped fixtures are usually designed for people with less physical ability than the general public, for the handicapped toilet requirement, the height is higher than standard toilet. What is the height of the handicapped fixtures?

18 inches

Water taken from background sources usually contain compound of Calcium and Magnesium which render its inconvenient for domestic used particularly?

It precipitate salt form within pipe that reduces the diameter

The device installed above the flood level rim of plumbing fixtures to primarily permit air from atmosphere to prevent back siphonage of liquid from the fixture is known as:

Vacuum breaker

Whenever water flow in the water supply system of a building, there is a continues loss of pressure generating between the moving water and inner surface of pipe, this is known as:

Pressure loss

As the water line for the building strike against the higher spots inside pipe surface, energy is transferred into the pipe causing it to move or vibrate, also produces line noise, these phenomenon is known as:

Water hammer

When backfilling over laid drainage pipe, a plumber must take measure to prevent damage to the pipe. Back fill materials should be added gradually at typical layer and must be compacted before nest layer is dump.

0.30 & 0.60 m per layer

When pipe penetrate an exterior wall it must pass thru a sleeve. What is the size of the sleeve thru which to be installed for the pipe to rest?

One pipe size larger

Factory waste or domestic waste is not allowed to be discharge into the drain pipe such as what?

Storm drain pipe

Manholes are NOT required for the laid drain pipe of this diameter

150 mm

Which of the following trap is a prohibited trap inside residences?

Bell trap

Aside from the proper sizing of house drain, the other factor in the installation is the grade, what is the pipe pitch necessary to have adequate flow throughout the length and assure through discharge of waste water.

¼ in/ft

The phenomenon called water hammer, brought about by sudden closing or opening of valves can be controlled by installing devices above each faucet such as these:

Air chamber

In plumbing installation, what portion of pipeline do you need to provide air break?

Indirect water connection

The new technique of installing floor mounted water closet with the end in view of assuring cleanliness, leak proof and convenience is with the used of this materials:

Floor flange and gasket

The ventilation method whose primary purpose is NOT to protect trap against back pressure and siphonage is what?

Main vent

The wastes in plumbing system contain many chemical elements which are detrimental to the piping materials yet can be eliminated through proper ventilation. What elements are found to be in large quantities that cause deterioration of piping materials?

Hydrogen

Which of the fixture need to be provided with individual vent to avoid the transmittal or surge effect to other fixture trap connected to a branch drain:

Bathtub

During the initial phase of waste water to discharge into drain pipe, which of the fixtures produces the very sudden and heavy surge with appreciable shock effect in other fixture:

Bathtub

In inserting a wye fitting into laid house sewer, the practical produce is these

Cut the sewer to the length, insert wye and joint ends with sleeves

After threading of a G.I. pipe thru a stack and dies the next step for plumber should do is to ream the inside of pipe for these purpose

Smoothening the surface end of the pipe

When a caulking iron had stricken hard a cast iron hub while doing caulk joint and had the pipe cracked, what would you do?

Replace the pipe and fitting

An inside roof leader is extended vertically through the floor of the building to a point below the roof. What is the common practice to reduce the danger of breakage which may result from expansion and contraction of roof?

Install packing materials to cushion possible impact

What of the following device is NOT a plumbing fixture?

Pneumatic pump

In preparing of a mortar or form a sticky mass to be squeezed into the bell of clay pipe for a cement joint, the mixture will be

Pure cement and water

It is a loss of trap seal due to unequal atmospheric pressure condition and due to rapid flows of water thru the trap.

Siphonage

100

It is portion of the vent pipe through which liquid waste flow:

Wet vent

YT1 Materials Engineer EXAM

ユーザ名非公開 · 100問 · 1ヶ月前

YT1 Materials Engineer EXAM