Plumbing Year 2 Final

T / F When an existing building changes use or occupancy, all plumbing systems within must be brought into compliance with current codes.

True

T / F When providing additional branches to an existing gas-piping system, the system sizing must be checked to determine if it's properly sized for the new appliance and those already existing

True

To find the run in a rolling offset, multiply the ______ by the constant for the fitting angle.

True offset

When testing a new electric water heater after installation, the first step is too _____.

Turn on the water and check for leaks

For oil-fueled appliances, vents are designated as _____.

Type L

Water Supply Fixture Units vary with the quantity and temperature of the water and the ________________.

Type of fixture

Because natural gas is lighter than air, model plumbing codes restrict its use ______.

Under a building

You should never attempt to repair a valve that is _____________.

Under pressure

Any pressure less than that exerted by atmosphere is a (an) ___________________.

Vacuum

Every water supply to a urinal shall be protected by an approved _______________.

Vacuum breaker

The pipe or duct that connects a fuel-gas-burning water heater to a vent or chimney is a _____.

Vent connector

Plastic materials for _________ piping outside underground shall have a blue insulated copper tracer wire or other approved conductor installed adjacent to the piping

Water service

Deviations from this codes are permitted when ______.

Work is done in existing buildings

Yes / No Sewage pump vents may be combined with other vents.

Yes

You should know how to read mechanical drawings because _____.

You may have to install the piping the connects to the HVAC units

Brass is an alloy of copper and _____.

Zinc

1 1/2 pipe is rated at (a) vent fixture units, but it cannot be used with (b).

(A) 8 (B) Toilet

All plumbing inspectors within the State of Idaho shall have the following qualifications.

-Be fully familiar with the plumbing codes -Have a journeyman plumber's license -Have not less than 5 years experience in the plumbing trade

For single-family dwellings, what are the requirements for sewage ejector pumps?

-Capable of pumping not less than 20 gpm -Must have a backwater valve and gate valve installed on the discharge line -Must pass a 1 1/2" solid ball -Not less than 2" discharge

Where can gas piping be located?

-Crawl spaces -Wall cavities -Makeup air ducts -Attics -Above drop ceilings

Duties of the Plumbing Department Program Manager at the division of building safety include:

-Impose civil penalties as provided -Take action to prevent any person not in compliance with State of Idaho plumbing laws from further violations -Administer oaths of witnesses appearing before him -Appoint licensed inspectors

What are the requirements for "public use" sewage pumps?

-Operate independently when one pump fails -Must function alternately -Have an audio and visual high-water alarm -Lowest inlet shall be two inches above the turn-on level -Must have dual pumps -All parts must be accessible

Pick all that are true reguarding gas piping outlets.

-Shall be securely fastened in place -Unthreaded portion shall extended not less than 1" from a wall or ceiling -Not be located behind doors -Unthreaded portion shall extend not less that 2" from a floor -Long enough to allow "backup" wrenched on piping

Pick which statements are true regarding gas meter location and requirements

-Shall be sized maximum expected pressure and permissible pressure drop -Must be protected from possible damage or extreme temperatures -May be supported by the rigid piping of the building's gas system -Shall be readily accessible and well ventilated

Gas water heaters must be properly vented to remove a dangerous gas called _____.

Carbon monoxide

Current

Caused by the movement of electrons. Expressed as amperes or amps

Each outlet on a nonpotable waterline that may be used for drinking purposes shall be posted_______.

Caution - non potable water do not drink

Before installing a new electric water heater, a plumber should____.

Check that the new heater is set at the proper voltage

When installing or replacing an electric water heater, it is always safest to____.

Check the voltage with a voltage tester

A horizontal drain that is sized to provide free movement of air above the flow line of the drain is called a ______.

Combination waste and vent

Where piping penetrates a rated assembly, _____ piping shall not connect to noncombustible piping unless it can be demonstrated that the transition complies with this chapter.

Combustible

Prior to being ______, piping penetrations shall be inspected by the Authority Having Jurisdiction to verify compliance.

Concealed

Heat pump water heaters require the installation of _______.

Condensate drains

A vertical vent that is a continuation of the drain to which it connects is a ______.

Continuous vent

You are installing the water supply system for an apartment building. To allow individual apartments to be isolated for repair and servicing, install____on the water lines to each apartment.

Control valves

Motion caused by the different densities of hot and cold water is called____.

Convection

Drainage piping serving fixture below the ______ of the main sewer shall drain into an approved water-tight sump.

Crown level

The higher the voltage, the greater the ______.

Current

Ballcocks in water closet tanks shall be installed so that the critical level of the water inlet is above the full opening of the overflow pipe at least ____ inch(es).

1

The minimum size trap and trap arm for a bathtub is _____ inches.

1 1/2

The diameter of a waste and overflow for a bathtub shall not be less than ____________.

1 1/2 inches OD

The tailpiece diameter for lavatories shall not be less than _______ inches.

1 1/4

When supporting horizontal piping 5 - inches in diameter with hangers, a _______ inch diameter rod shall be used.

1/2

A common slope for a shower subfloor, measured from the wall framing to the edge of the drain base, is ____ per foot.

1/4"

1 1/4" pipe

10 feet

Water closets set side by side shall be no closer than ______ inches center to center

30

With two noted exceptions, all shower compartments and receptors shall be capable of encompassing a ______ inch diameter circle

30

In an isometric drawing, all vertical lines are depicted vertically, and all horizontal lines are projected at a _____ angle.

30 degree

The T rating limits the maximum temperature rise of _____ degrees F above its initial temperature through the penetration on the no fire side.

325

To ensure lavatories and sinks are installed in compliance with ADA guidelines, ensure that the heights of the front of the fixture's rim or counter from the floor is no more than ____ inches.

34

The quantity of water required to be supplied to every plumbing fixture shall be represented by_______.

Fixture units

FVIR stands for

Flammable vapor ignition resistant

Ball cocks are also known as _____.

Float-controlled valves

A valve that is designed to carry gas is marked of the valve body with the letter _____.

G

Any arrangement of gas piping or regulators after the point of delivery, and each of gas piping serving a building, structure, or premises, whether individually metered or not.

Gas-Piping system

Ensures that lines have proper _____ to permit LP gas to flow back underground piping and change back into vapor.

Grade

The color stripe on Type "K" hard-drawn copper tubing is ________.

Green

Showers in all buildings shall be provided with individual control valves of the ________________ type.

A and B apply

Where damage may result from leaking, such as on a _______________, a watertight pan of corrosion-resistant materials should be installed under the water heater

A floor-ceiling assembly

Voltage

A measure of the electrical potential for current flow. Also known as electromotive force (EMF).

2 inch pipe is rated at [a] fixture units vertically, and [b] units horizontally. 2 inch cannot be used to drain a [c]. It's rated at [d] fixture units for venting.

A. 16 B. 8 C. Water closet D. 24

In the State of Idaho, 1 1/2" pipe is rated at [a] horizontal fixture units, but we cannot drain a [b], [d] or a [c] with it.

A. 2 B. Shower C. Kitchen D. Dishwasher

4" pipe, sloped at 1/4" per foot is rated at [a] fixture units, but at 1/8" per foot it's [b]fixture units. Run vertically, it's rated at [d] fixture units. As a vent, it can handle [c]fixture units.

A. 216 B. 172 C. 256 D. 256

3" pipe can handle up to [a] fixture units horizontally, [b] fixture units vertically, but only [c] toilets horizontally and [d] toilets vertically.

A. 35 B. 48 C. 3 D. 4

The two methods for sizing gas piping mentioned in the UPC are the [a] method and the [b] method.

A. longest length B. branch length

Yes / No When new branches are added to an existing system, the entire system shall be pressure tested for leaks

No

The connection between a washer drain hose and a standpipe must _________________.

Not be airtight

A constantly weeping relief valve could be a sigh of _____.

Not enough expansion capability

It shall be unlawful for any person to install, remove, or replace any water heater without first_____.

Obtaining a permit from the AHJ

The building drain from the front building may be extended to the rear building when both buildings are located ______.

On an interior lot

Each of the following is an acceptable way to install a backwater valve except _______________.

On fixtures with flood rims above the upstream manhole cover

Apprentice and journeyman plumbers must have their registrations or certificates of competency _____.

On their person, or close to the job site

Local codes require at least___hose bib(s) in a residential building.

One

Manually controlled flushometer valves shall be used to flush not more than ________ urinal(s).

One

A type B vent is used for venting a listed or approved appliance equipped to burn ____.

Only gas

Pressure regulators must be located on the _____ side of an LP gas container.

Outlet

Where providing combustion air for draft hood-equipped water heaters installed in repair garages, all combustion air shall be obtained from ______.

Outside the building

The power formula is ______.

P=ExI

Request for information (RFI) _____.

Points out an error on, or question about, the plans

In a single-phase electrical power, voltage fluctuates rapidly between ______.

Positive and Negative

The primary reason for installing backflow prevention assemblies is to______.

Prevent pollution or contamination of the potable water supply

The formula used to express the relationships among the sides of a right triangle is called the _____.

Pythagorean theorem

If the backflow prevention specified on the construction drawings differs from what is recommended in your local applicable code, you should submit a(n) _____.

RFI

A transformer is used to _____.

Raise or lower voltage

A person alleged to be in violation of provisions of this code will notified by ______ of the time and location of his hearing.

Registered Mail

Use Ohm's law to calculate voltage, current, or _____.

Resistance

Once construction is underway, modification to the plans are submitted as either ______.

Revisions or change orders

To help reduce the possibility that water supply pipes will be accidentally punctured by nails or screws,____.

Run pipes through the center of a 2x4 wall

Copper water tube Type "M" may be installed within a building______.

Above ground only

Sulfur compounds are added to natural gas to _____.

Aid in detecting leaks

The piping material not approved in the cold water piping located inside a building is ___________.

All of the above

Current is measured in _____.

Amperes

A water heater is installed on the roof of a building more than 15 feet in height. The code requires _____ to the roof unless other means acceptable to the AHJ are used.

An inside means of access

No plumbing system, drainage system, building sewer, private sewage disposal system, or parts thereof, shall be located in ______.

Any lot other than the lot that is the site of the building served by such facilities

An assembly of listed semi-rigid or flexible tubing and fittings to carry fuel between a fuel - piping outlet and a fuel - burning appliance.

Appliance fuel connector

Electronic flushometers trigger the flushing action with a(n) ______________.

infrared device

The piping route in most water supply systems is determined by_______.

the least amount of pipe and fittings required to ensure proper flow to all fixtures in the system

When servicing a float-controlled valve, do not adjust the float ball by bending the float arm because _______________.

the rod may rotate a half-turn, causing the tank to overflow

Fuel oils are rated by both flash points and _____ .

viscosity

______ drawings serve as the permanent record of a project.

As-built

If a building is equipped with a gravity drain down system, install valves____.

At the low points of each line

The organization, office, or individual responsible for enforcing the requirements of a code or standard is the __________________.

Authority Having Jurisdiction

A device installed in a drainage system to prevent reverse flow is a ___________________.

Backwater valve

The top immersion element in most electric water heaters operates____.

Before the lower element

During periods of normal demand, ______ immersion elements in an electric water heater can be used.

Both

When the backflow prevention device does not bear a critical level marking, the part of the device that shall constitute the critical level is the _________________.

Bottom

Screws or bolts for securing floor-mounted fixtures shall be made of __________.

Brass

In addition to meeting the requirements for firestop protection in this chapter, the protection of the penetration must meet any additional requirements in the ________.

Building code and this chapter

That part of the lowest piping of a drainage system that receives the discharge from soil, waste, and other drainage pipes inside the walls of the building and conveys it to a point 2 feet outside the building wall is a __________________.

Building drain

What is the minimum amount of cubic feet of air space required around a heat pump water heater?

1000

Maximum hot water temperature permitted for a bidet installation shall be _____________.

110 degrees F

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

12

The minimum distance from a side wall or partition to the center of a urinal shall be _______ inches

12

Backflow prevention devices installed in the water supply line to steam boilers shall be installed______.

12 inches above the floor

A 120 V circuit containing a 1,500W load draws a current of

12.5A

The minimum size drain line for a wall-hung urinal is _____ inches.

2

After allowing for friction and other pressure losses, the residual water pressure shall be at least_____.

15 psi

A 4" sewer pipe is 94 feet from the test wye at the sewer to the stub into the home. The cleanout is 36" tall from center to the cleanout plug. If your hose is putting out 3 1/2 gallons per minute, how long will it take to fill the pipe with water?

18

PEX tubing shall not be installed within the first _______ inches of piping connected to a water heater.

18

The clearance required in front of a 2 inch cleanup shall not be less than ________.

18 inches

Codes require the height of washing machine standpipes to be at least _______.

18"

A DPDT switch can control _____ circuits

2

Rolling offsets form _____ right triangles.

2

Compared to a 1/2" pipe, how much more water will a 3/4" pipe hold?

2-1/4 times more

The drainage fixture unit value assigned to a bathtub or combination bath/shower is _____.

2.0

Flexible corrugated connectors of copper or stainless steel for water heater connectors shall be limited to ________ inches.

24

The clear space in front of any water closet or bidet shall not be less than ___________ inches

24

The electrical service requires by most electric water heaters is _______.

240V

Combustion air supplied by using the "standard method" requires a minimum volume of____.

50 cu ft per 1,000 Btu/hr

1/2" pipe

6 feet

Convert 6' 8 3/8' to decimal feet.

6.7

The available pressure at the water meter is 80 psi. At the highest supply outlet, 36 feet above the water meter, the pressure would be ____ psi

62

A three-bedroom home with two bathrooms is equipped with a gas storage-type water heater. The minimum capacity for the water heater in accordance with the first hour ratings is______.

67 gallon

Exit terminals of mechanical draft systems shall not be less than ____ above grade where located adjacent to public walkways.

7 feet

The true offset for an installation with a rise of 5-5/8 inches and an offset of 4-7/8 inches is ______ inches.

7-7/16

One horsepower is equal to _____.

746 watts

Other than systems sized by the use of table 610.4, the maximum velocity of a cold water system containing copper and copper alloy tube and fittings shall be limited to _______ feet per second.

8

3/4" pipe

8 feet

A water heater that is constructed and installed so that all air for combustion is derived directly from the outside atmosphere and all flue gasses are discharged to the outside atmosphere is a____.

Direct-vent appliance

The most common loads found in plumbing systems are ______.

Electric motors

In a parallel connection, the pipe leading from the feed lines to the cold water inlet, compared to the feed line of the hot water outlet, must be _______.

Equal in length

When cold water enters a water heater to replace hot water that has been used, it _____

Expands in volume

Any water system that prevents dissipation of building pressure back into the water main shall be provided with an approved, listed, and adequately sized ____________ or other approved device.

Expansion tank

T / F Cities within the State of Idaho must adopt and enforce the State Plumbing rules and laws.

False

T / F Most instantaneous water heaters supply enough hot water to meet simultaneous demand from heavy-use fixtures in a single household.

False

T / F Notching a beam or floor noise is preferable too boring.

False

T / F Once a building begins to be remolded, all plumbing contained within said building shall be made to comply with current codes.

False

T / F When a branch outlet is installed on a main line and it is unknown that appliance will be connected to it, it shall be one pipe size smaller than the main line that supplies it.

False

To heat water in the storage tank, electric water heater use _____.

Immersion elements

Copper tubing used for water piping under a concrete slab within a building shall be ____________.

Installed without joints where possible

Hard-drawn copper tubing, marked with a blue stripe, is referred to as type ______.

L

Compared to a faucet attached to a larger diameter pipe, the amount of time that a faucet with a narrower diameter pipe will have to run to get hot water to a sink is _______.

Less

Water softeners are not required to be connected to a _____.

Line serving a hose bibb

Plastic piping may be to vent a water heater if the water heater is _____.

Listed for use with the material

On a compressor motor, the initial current surge is known as ____ amps.

Locked rotor

Cleanouts upstream of a backwater valve shall be ______.

Marked with a sign which says: backwater valve downstream

Gas-fired water heaters are susceptible to _______.

Mineral sediment buildup

Water piping systems shall be designed on the basis of the_____.

Minimum pressure

_____ is lighter than air and has the lowest ratio of Btu per cubic foot of fas of the fuel gases.

Natural gas

Before touching de-energized wires, always _____.

Short components to ground

The maximum fixture unit loading allowed on a 2 inch waste stack is ______.

Sixteen

A joint obtained by the joining of metal parts with metallic mixtures or alloys that melt at a temperature up to and including 840 degrees Fahrenheit is a _________________.

Soldered joint

Control devices that use electromagnets to operate valves are called _____.

Solenoids

The pressure rating: "SWP" stands for _______________.

Steam working pressure

If an AHJ permits an "alternative engineered designe," _____.

The approval shall have no effect beyond that AHJ boundary

Backwater valves shall be installed when there are fixtures on a floor level that is lower than ______.

The next upstream manhole

The hot water flow in a tankless water heater is limited by _______.

The heater's output capacity

Resistance

The property that causes a material to impede the flow of electricity. Expressed as ohms

When calculating an offset using 45-degree elbows, _____.

The rise and the run equal

When calculating a buildings demand, each of the following is a factor to consider except___.

The type of piping to be used

If water is released when the lever is lifted on a water heater T/P relief valve, _____.

The valve is functioning normally

Water heaters installed in residential garages shall be installed so that all burners are located not less than 18 inches above the floor unless ______.

The water heater is listed as flammable vapor ignition resistant

Which of these statements about gate valves is true?

They provide an unobstructed passageway

The curb or threshold of a shower compartment may be eliminated ______________.

To comply with accessibility standards

T / F Fixtures on the floors above the backwater valve must discharge into the sewer downstream of the backwater valve.

True

T / F Static pressure is pressure existing without any flow.

True

T / F The leak check is different from a pressure test

True

If the vents of the fixtures draining into a sump are combined with the sump vent they ______ the fixture unit rating of that vent pipe.

have no effect upon

Draft hood-equipped and other fuel-burning Category I water heaters may be installed in closets, bedrooms and bathrooms provided______.

the closet has a listed, gasketed door assembly and a listed self-closing device