Plumbing 1st Importance

Question 1

1” copper tubing installed horizontally shall be supported every___________
feet.

Answer 1

6 feet
Suspended piping shall be supported at intervals not to exceed those shown in Table 313.3.

Question 2

Direct connections between potable water piping and sewer connected wastes shall not exist under any condition with or without________protection.

Answer 2

Backflow
Direct connections between potable water piping and sewer-connected wastes shall not be permitted to exist under any condition with or withol backflow protection. Where potable water is discharged to the drainage system, it shall be by means of an approved air gap of two pipe diamete of the supply inlet, but in no case shall the gap be less than 1 inch (25. mm). Connection shall be permitted to be made to the inlet side of a tra provided that an approved vacuum breaker is installed not less than 6 inches (152 mm), or the distance according to the device’s listing, abov the flood-level rim of such trapped fixture, so that at no time will such device be subjected to backpressure.

Question 3

Underground piping systems shall be installed within a minimum of________inches of cover.

Answer 3

12 inches
Underground piping systems shall be installed with a minimum of 12 inches (305 mm) of cover. The minimum cover shall be increased to 18 inches (457 mm) if external damage to the pipe or tubing from external forces is likely to result. Where a minimum of12 inches (305 mm) of cover cannot be provided, the pipe shall be installed in conduit or bridged (shielded). [NFPA 54:7.1.2.1 (A) (B)] (NFPA 54: National Fuel Gas Code)

Question 4

No urinal shall be set closer than________ inches center to center.

Answer 4

24 inches
Fixtures shall be set level and in proper alignment with reference to adjacent walls. No water closet or bidet shall be set closer than 15 inches (381 mm) from its center to a side wall or obstruction nor closer than 30 inches (762 mm) center to center, to a similar fixture.
The clear space in front of a water closet or bidet shall be not less than 24 inches (610 mm). No urinal shall be set closer than 12 inches (305 mm) from its center to a side wall or partition nor closer than 24 inches (610 mm) center to center.

Question 5

Indirect waste piping must discharge into the building drainage system through an:

Answer 5

An air gap or air break

Indirect waste piping shall discharge into the building drainage system through an air gap or air break as set forth in this code.
Where a drainage air gap is required by this code, the minimum vertical distance as measured from the lowest point of the indirect waste pipe or the fixture outlet to the flood-level rim of the receptor shall be not less than 1 inch (25.4 mm).

Question 6

Water Closet and Urinal Flushometer Valve shall be equipped with a listed__________

Answer 6

Atmospheric vacuum breaker (AVB)

Water closet and urinal flushometer valves shall be protected against backflow by an approved backflow prevention assembly, device, or method. Where the valves are equipped with an atmospheric vacuum breaker, the vacuum breaker shall be installed on the discharge side of the flushometer valve with the critical level not less than 6 inches(152 mm), or the distance according to its listing, above the overflow rim of a water closet bowl or the highest part of a urinal.

Question 7

What is the maximum fixture unit loading allowed on a 2” waste stack?

Answer 7

16 units

Table 703.2 shows the maximum number of fixture units allowed on a vertical or horizontal drainage pipe, building drain, or building sewer of a given size; the maximum number of fixture units allowed on a branch interval of a given size; and the maximum length (in feet and meters) of a vertical drainage pipe of a given size.

Question 8

The maximum distance between manholes shall not exceed______________feet.

Answer 8

300 feet

Approved manholes shall be permitted to be installed in lieu of cleanouts, where first approved by the Authority Having Jurisdiction.
The maximum distance between manholes shall not exceed 300feet (91 440 mm). The inlet and outlet connections shall be made by the use of a flexible compression joint not less than 12 inches (305 mm) and not exceeding 3 feet (914 mm) from the manhole.No flexible compression joints shall be embedded in the manhole base.

Question 9

Plastic and copper piping run through framing members to within__________inch of the exposed
framing shall be protected by steel nail plates not less than 18 gauge.

Answer 9

1 inch

Plastic and copper or copper alloy piping penetrating framing members to within 1 inch (25.4 mm) of the exposed framing shall be protected by steel nail plates not less than No. 18 gauge(0.0478 inches) (1.2 mm) in thickness. The steel nail plate shall extend along the framing member no less than 1-1/2 inches(38 mm) beyond the outside diameter of the pipe or tubing.

Question 10

What is the minimum separation when sewer piping materials are used with water pipe?

Answer 10

12 inches

(1) The bottom of the water pipe, shall be not less than 12 inches(305 mm) above the top of the sewer or drain line.

Question 11

All water service yard piping shall be at least_________inches below the average local frost

Answer 11

12 inches

Piping, equipment, appurtenances, and devices shall be installed in a workmanlike manner in accordance with the provisions and intent of the code. Building supply yard piping shall be not less than 12inches (305 mm) below the average local frost depth. The cover shall be not less than 12 inches (305 mm) below finish grade.

Question 12

Unions shall be installed in the water supply piping within____________inches of equipment
which may require service by removal or replacement.

Answer 12

12 inches

Unions shall be installed in the water supply piping not more than 12 inches (305 mm) of regulating equipment, water heating, conditioning tanks, and similar equipment that requires service by removal or replacement in a manner that will facilitate its ready removal.

Question 13

Termination of each vent must be a minimum of
__________________in any direction from a lot line,
alley and street excepted.

Answer 13

3 feet

Each vent shall terminate not less than 10 feet (3048 mm) from, or not less than 3 feet (914 mm) above, an openable window, door, opening, air intake or vent shaft, or not less than 3 feet (914 mm) in every direction from a lot line, alley and street excepted.

Question 14

No more than_____________of the total permitted
length of any minimum sized vent shall be installed in a horizontal position.

Answer 14

1/3

Not more than one-third of the total permitted length, in accordance with Table 703.2, of a minimum-sized vent shall be installed in a horizontal position.
Exception: Where a minimum-sized vent is increased one pipe size for its entire length, the maximum length limitation shall not apply.

Question 15

No trap for any clothes washer standpipe receptor shall be installed below the floor, but shall be roughed in not more than_____________ inches above the floor.

Answer 15

18 inches

Plumbing fixtures or other receptors receiving the discharge of indirect waste pipes shall be approved for the use proposed and shall be of such shape and capacity as to prevent splashing or flooding and shall be located where they are readily accessible for inspection and cleaning. No standpipe receptor for a clothes washer shall extend more than 30 inches (762 mm), or not less than 18 inches (457 mm) above its trap. No trap for a clothes washer standpipe receptor shall be installed below the floor, but shall be roughed in not less than 6 inches (152 mm) and not more than 18 inches (457 mm) above the floor.

Question 16

No trap for any clothes washer standpipe receptor shall be installed below the floor, but shall be roughed in not less than__________inches above the floor.

Answer 16

6 inches

Plumbing fixtures or other receptors receiving the discharge of indirect waste pipes shall be approved for the use proposed and shall be of such shape and capacity as to prevent splashing or flooding and shall be located where they are readily accessible for inspection and cleaning. No standpipe receptor for a clothes washer shall extend more than 30 inches (762 mm), or not less than 18 inches (457 mm) above its trap. No trap for a clothes washer standpipe receptor shall be installed below the floor, but shall be roughed in not less than 6 inches (152 mm) and not more than 18 inches (457 mm) above the floor.

Question 17

Water closets shall have an average consumption of not more than___________gallons of water per flush.

Answer 17

1.6 gallons

Water closets, shall have a maximum consumption not to exceed1.6 gallons (6.0 Lpf) of water per flush.

Question 18

Each vent pipe or stack shall extend through its flashing and shall terminate vertically not less than_________________foot from any vertical
surface.

Answer 18

1 foot

Each vent pipe or stack shall extend through its flashing and shall terminate vertically not less than 6 inches (152 mm) above the roof nor less than 1 foot (305 mm) from a vertical surface. ABSand PVC piping exposed to sunlight shall be protected by waterbased synthetic latex paints.

Question 19

Water heaters in garages shall be located or protected so it is not subject to__________by a moving vehicle.

Answer 19

Physical damage

Appliances installed in garages, warehouses, or other areas subject to mechanical damage shall be guarded against such damage by being installed behind protective barriers or by being elevated or located out of the normal path of vehicles.

Question 20

An appliance for supplying hot water for domestic or commercial purposes.

Answer 20

Water Heater

An appliance designed primarily to supply hot water for domestic or commercial purposes and equipped with automatic controls limiting water temperature to a maximum of 210°F (99°C).

Question 21

This code refers to water that meets the requirements of the Authority Having Jurisdiction to be satisfactory for culinary, domestic, and drinking purposes as:

Answer 21

Potable water

Water that is satisfactory for drinking, culinary, and domestic purposes and that meets the requirements of the Health Authority Having Jurisdiction.

Question 22

Urinals shall have an average water consumption of not more than___________gallons of water per flush.

Answer 22

1.0 gallon

Urinals shall comply with ASME A112.19.2/CSA B45.1, ASMEA112.19.19, or CSA B45.5/IAPMO Z124. Urinals shall have an average water consumption not to exceed 1 gallon (3.8 Lpf) of water per flush.

Question 23

To protect against rodents, strainer plates on drain inlets must be designed and installed so that no opening is greater than__________in the
least dimension.

Answer 23

1/2”

Strainer plates on drain inlets must be designed and installed so that no opening exceeds 1/2 of an inch (12.7 mm) in the least dimension.

Question 24

Hose connections in health care or laboratory areas shall not be less than__________feet above the floor.

Answer 24

6 feet

Vacuum breakers for washer-hose bedpans shall be located not less than 5 feet (1524 mm) above the floor. Hose connections in health care or laboratory areas shall be not less than 6 feet(1829 mm) above the floor.

Question 25

Water heaters may be installed in a garage, provided all burners and burner-ignition devices are at least__________________inches above the
floor.

Answer 25

18 inches

Appliances in residential garages and in adjacent spaces that open to the garage and are not part of the living space of a dwelling unit shall be installed so that all burners and burner-ignition devices are located not less than 18 inches (457 mm)above the floor unless listed as flammable vapor ignition resistant.[NFPA 54:9.1.10.1]
(NFPA 54: National Fuel Gas Code)

Question 26

Restrooms in commercial, industrial, and institutional occupancies that use nonpotable rainwater for urinals, water closets, or both, must have a sign posted with letters__________ high, in a highly visible color, on a
contrasting background.

Answer 26

1/2 inch

A sign shall be installed in restrooms in commercial, industrial and institutional occupancies using nonpotable rainwater for water closets, urinals, or both. Each sign shall contain 1/2 of an inch (12.7 mm) letters of a highly visible color on a contrasting background. The location of the sign(s) shall be such that the sign(s) shall be visible to users. The number and location of the signs shall be approved by the Authority Having Jurisdiction and shall contain the following text:
TO CONSERVE WATER, THIS BUILDING USES RAINWATER TO FLUSH TOILETS AND URINALS.

Question 27

What colors are used to identify potable water, when a building has both potable and nonpotable water?

Answer 27

Green background with white lettering.

Question 28

No wet vent shall exceed___________ feet in developed length.

Answer 28

6 feet

Wet venting is limited to vertical drainage piping receiving the discharge from the trap arm of one and two fixture unit fixtures that also serves as a vent not exceeding four fixtures. Wet-vented fixtures shall be within the same story; provided, further, that fixtures with a continuous vent discharging into a wet vent shall be within the same story as the wet-vented fixtures. No wet vent shall exceed 6 feet (1829 mm) in developed length.

Question 29

All trenches deeper than the footing of any building or structure and paralleling the same shall be at least____________degrees there from.

Answer 29

45°

Trenches deeper than the footing of a building or structure, and paralleling the same, shall be located not less than 45 degrees (0.79 rad.) from the bottom exterior edge of the footing, or as approved in accordance with Section 301.2.
(2018 UPC - 301.2 Minimum Standards.)

Question 30

In showers, no dam or threshold shall be less than___________inches when measured from the
top of the dam or threshold to the top of the drain.

Answer 30

2 inches

Where a shower receptor has a finished dam, curb, or threshold it shall be not less than 1 inch (25.4 mm) lower than the sides and back of such receptor. In no case shall a dam or threshold be less than 2 inches (51 mm) or exceeding 9 inches (229 mm)in depth where measured from the top of the dam or threshold to the top of the drain.

Question 31

In showers, no dam or threshold shall be more than_____________in depth when measured from
the top of the dam or threshold to the top of the drain.

Answer 31

9 inches

Where a shower receptor has a finished dam, curb, or threshold it shall be not less than 1 inch (25.4 mm) lower than the sides and back of such receptor. In no case shall a dam or threshold be less than 2 inches (51 mm) or exceeding 9 inches (229 mm)in depth where measured from the top of the dam or threshold to the top of the drain.

Question 32

All shower compartments, regardless of shape, shall have a minimum finished interior of_____________square inches.

Answer 32

1024 sq. in.

Shower compartments, regardless of shape, shall have a minimum finished interior of 1024 square inches (0.6606 m2) and shall also be capable of encompassing a 30 inch (762 mm) circle

Question 33

All shower compartments, regardless of shape, shall be capable of encompassing a_____________
inch circle.

Answer 33

30 inch

Shower compartments, regardless of shape, shall have a minimum finished interior of 1024 square inches (0.6606 m2) and shall also be capable of encompassing a 30 inch (762 mm) circle.

Question 34

The standard designation colors for marking a pipe carrying oxygen is:

Answer 34

Green background and white text

Piping shall be labeled by stenciling or adhesive markers that identify the patient medical gas or medical vacuum system and include the following:
(1) The name of the gas or vacuum system or the chemical symbol per
Table 1305.1.
(2) Gas or vacuum system color code per Table 1305.1.
(3) Where positive-pressure gas piping systems operate at pressures other than the standard gauge pressure in Table 1305.1, the operating pressure in addition to the name of the gas. [NFPA 99:5.1.11.1.1]
(NFPA 99: Health Care Facilities Code)

Question 35

If an indirect waste pipe requires an airgap, then it must discharge through_______________into the building drainage system.

Answer 35

A drainage airgap of 1-inch minimum

Indirect waste piping shall discharge into the building drainage system through an air gap or air break as set forth in this code.
Where a drainage air gap is required by this code, the minimum vertical distance as measured from the lowest point of the indirect vaste pipe or the fixture outlet to the flood-level rim of the receptor hall be not less than 1 inch (25.4 mm).

Question 36

No galvanized wrought iron or galvanized steel pipe shall be used underground and shall be kept at least_____________inches above the
ground.

Answer 36

6 inches

(1) No galvanized wrought-iron or galvanized steel pipe shall be used underground and shall be kept not less than 6 inches(152 mm) aboveground.

Question 37

Notification for inspection shall be given not less than_______________hours before the work is to
be inspected.

Answer 37

24 hours

It shall be the duty of the person doing the work authorized by the permit to notify the Authority Having Jurisdiction, orally or in writing, that said work is ready for inspection. Such notification shall be given not less than 24 hours before work is to be inspected.

Question 38

Plumbing fixtures shall be installed in a manner to afford_____________access for repairs
and cleaning.

Answer 38

Easy

Plumbing fixtures shall be installed in a manner to afford easy access for repairs and cleaning. Pipes from fixtures shall be run to.
the nearest wall.

Question 39

Additional building sewer cleanouts shall be installed at intervals not to exceed__________feet in straight runs.

Answer 39

100 feet

Cleanouts shall be placed inside the building near the connection between the building drain and the building sewer or installed outside the building at the lower end of the building drain and extended to grade. Additional building sewer cleanouts shall be installed at intervals not exceeding 100 feet (30 480 mm)in straight runs and for each aggregate horizontal change indirection exceeding 135 degrees (2.36 rad).

Question 40

Shower doors shall open so as to maintain a minimum__________inch unobstructed opening
for egress.

Answer 40

22 inches

Shower doors shall open so as to maintain not less than a 22 inch (559 mm) unobstructed opening for egress.

Question 41

The finished floor of a shower receptor shall slope uniformly from the sides toward the drain not less than_____________inch per foot.

Answer 41

1/4 inch

The finished floor of the receptor shall slope uniformly from the sides towards the drain not less than 1/4 inch per foot(20.8 mm/m), nor more than 1/2 inch per foot (41.8 mm/m).

Question 42

Additional building sewer cleanouts shall be installed at intervals for each aggregate horizontal change in direction exceeding_______________degrees.

Answer 42

135 degrees

Cleanouts shall be placed inside the building near the connection between the building drain and the building sewer or installed outside the building at the lower end of the building drain and extended to grade. Additional building sewer cleanouts shall be installed at intervals not exceeding 100 feet (30 480 mm)in straight runs and for each aggregate horizontal change indirection exceeding 135 degrees (2.36 rad).

Question 43

What is the maximum temperature for water being discharge under pressure, directly into the drainage system?

Answer 43

140° F

No steam pipe shall be directly connected to a plumbing or drainage system, nor shall water having a temperature above 140°F
(60°C)be discharged under pressure directly into a drainage system. Pipes from boilers shall discharge by means of indirect waste piping, as determined by the Authority Having Jurisdiction or the boiler manufacturer’s recommendations.

Question 44

One trap may serve a set of not more than_____________single compartment sinks or laundry tubs of the same depth.

Answer 44

3

One trap shall be permitted to serve a set of not more than three single compartment sinks or laundry tubs of the same depth or three lavatories immediately adjacent to each other and in the same room where the waste outlets are not more than 30 inches (762 mm) apart and the trap is centrally located where three compartments are installed.

Question 45

An Atmospheric Vacuum Breaker (AVB)
consists of a body, a checking member and an__________opening.

Answer 45

Atmospheric

An atmospheric vacuum breaker consists of a body, a checking member, and an atmospheric port.

Question 46

What colors are used to identify nonpotable water, when a building has both potable and nonpotable water?

Answer 46

Yellow background with black lettering.

Each system shall be identified with a colored pipe or band and coded with paints, wraps, and materials compatible with the piping. Except as required in Section 601.3.3, nonpotable water systems shall have a yellow background with black uppercase lettering, with the words “CAUTION: NONPOTABLE WATER, DO NOT DRINK.” Each nonpotable system shall be identified to designate the liquid being conveyed, and the direction of normal flow shall be clearly shown. The minimum size of the letters and length of the color field shall comply with Table 601.3.2.
The background color and required information shall be indicated every 20 feet (6096 mm) but not less than once per room, and shall be visible from the floor level.

Question 47

For a continuous flow into a drainage system, such as from a pump, sump, or similar device___________ fixture units shall be allowed for each gallon per minute of flow.

Answer 47

2 (d.f.u.)

Table 703.2 shows the maximum number of fixture units allowed on a vertical or horizontal drainage pipe, building drain, or building sewer of a given size; the maximum number of fixture units allowed on a branch interval of a given size; and the maximum length (in feet and meters) of a vertical drainage pipe of a given size.

Question 48

Valves up to an including_____________inches in
size shall be brass or other approved material.

Answer 48

2 inches

Valves up to and including 2 inches (50 mm) in size shall be copper alloy or other approved material. Sizes exceeding 2 inches (50 mm) shall be permitted to have cast-iron or copper alloy bodies. Each gate or ball valve shall be a fullway or full-port type with working parts of the non-corrosive material. Valves carrying water used in potable water systems intended to supply drinking water shall be in accordance with the requirements of NSF 61 and ASME A112.4.14, ASME B16.34, ASTM F1970, ASTM F2389, AWWA C500, AWWA C504, AWWA C507, IAPMO Z1157, MSS SP-67, MSS SP-70, MSS SP-71, MSS SP-72, MSS SP-78, MSS SP-80, MSS SP-110, MSS SP-122, or NSF 359.

Question 49

Flared joints for soft copper water tubing shall be______________to the full bore, resized to round
and expanded with a proper flaring tool.

Answer 49

Reamed

Flared joints for soft copper or copper alloy water tubing, the tubing shall be made with fittings that comply with the applicable standards referenced in Table 604.1. Pipe or tubing shall be cut square using an appropriate tubing cutter. The tubing shall be reamed to full inside diameter, resized to round and expanded with a proper flaring tool.

Question 50

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

Answer 50

18 inches

Flexible metallic (copper and stainless steel), reinforced flexible, braided stainless steel, or polymer braided with EPDM core connectors that connect a water heater to the piping system shall be in accordance with ASME A112.18.6/CSA B125.6. Copper, copper alloy, or stainless steel flexible connectors shall not exceed24 inches (610 mm). PEX, PEX-AL-PEX, PE-AL-PE, or PE-
RTtubing shall not be installed within the first 18 inches (457 mm) of piping connected to a water heater.

Question 51

All malleable iron water fittings shall be______________.

Answer 51

Galvanized

Malleable iron water fittings shall be galvanized.

Question 52

No standpipe receptor for any clothes washer shall extend more than inches___________above its trap.

Answer 52

30 inches

Plumbing fixtures or other receptors receiving the discharge of indirect waste pipes shall be approved for the use proposed and shall be of such shape and capacity as to prevent splashing or flooding and shall be located where they are readily accessible for inspection and cleaning. No standpipe receptor for a clothes washer shall extend more than 30 inches (762 mm), or not less than 18 inches (457 mm) above its trap. No trap for a clothes washer standpipe receptor shall be installed below the floor, but shall be roughed in not less than 6 inches (152 mm) and not more than 18 inches (457 mm) above the floor.

Question 53

True or False: Indirect waste connections must be provided for drains, overflows or relief vents from the water supply system.

Answer 53

True

Indirect waste connections shall be provided for drains, overflows or relief vents from the water supply system, and no piping or equipment carrying wastes or producing wastes or other discharges under pressure shall be directly connected to a part of the drainage system. The foregoing shall not apply to an approved sump pump or to an approved pressure-wasting plumbing fixture or device where the Authority Having Jurisdiction has been satisfied that the drainage system is adequately sized to accommodate the anticipated discharge thereof.

Question 54

indirect waste pipes less than 15 feet in length shall not be less than the diameter of the drain outlet and in no case less than___________inch in size

Answer 54

1/2 inch

Except as hereinafter provided, the size of indirect waste piping shall be in accordance with other sections of this code applicable to drainage and vent piping.
No vent from indirect waste piping shall combine with a sewer-connected vent, but shall extend separately to the outside air. Indirect waste pipes exceeding 5 feet (1524 mm) but less than 15 feet (4572 mm) in length shall be directly trapped, but such traps need not be vented. Indirect waste pipes less than 15 feet (4572 mm) in length shall be not less than the diameter of the drain outlet or tailpiece of the fixture, appliance or equipment served and in no case less than 12 of an inch (15 mm). Angles and changes of direction in such indirect waste pipes shall be provided with cleanouts so as to permit flushing and cleaning.

Question 55

The vertical distance between a fixture outlet and the trap weir shall be as short as practicable, but in no case shall the tailpiece from any fixture exceed____________inches in length.

Answer 55

24 inches

The vertical distance between a fixture outlet and the trap weir shall be as short as practicable, but in no case shall the tailpiece from a fixture exceed 24 inches (610 mm) in length. One trap shall be permitted to serve a set of not more than three single compartment sinks or laundry tubs of the same depth or three lavatories immediately adjacent to each other and in the same room where the waste outlets are not more than 30 inches (762 mm) apart and the trap is centrally located where three compartments are installed.

Question 56

No standpipe receptor for any clothes washer shall extend less than___________inches above its
trap.

Answer 56

18 inches

Plumbing fixtures or other receptors receiving the discharge of indirect waste pipes shall be approved for the use proposed and shall be of such shape and capacity as to prevent splashing or flooding and shall be located where they are readily accessible for inspection and cleaning. No standpipe receptor for a clothes washer shall extend more than 30 inches (762 mm), or not less than 18 inches (457 mm) above its trap. No trap for a clothes washer standpipe receptor shall be installed below the floor, but shall be roughed in not less than 6 inches (152 mm) and not more than 18 inches (457 mm) above the floor.

Question 57

In psychiatric patient rooms, piping and drain traps must be:

Answer 57

Concealed

Piping and drain traps in psychiatric patient rooms shall be concealed. Fixtures and fittings shall be resistant to vandalism.

Question 58

True or False: All hard drawn copper tubing shall be marked with a colored stripe:

Answer 58

True

Copper or copper alloy tubing, in addition to the required incised marking, shall be marked in accordance with either ASTM B306 or ASTM B88. The colors shall be: Type K, green; Type L, blue;
TypeM, red; and Type DWV, yellow.

Question 59

When applied to a fixture, connection, appliance, or equipment,_________________means having access to, but which first may require the removal of an access panel, door, or similar obstruction.

Answer 59

Accessible

Where applied to a fixture, connection, appliance, or equipment,
“accessible” means having access thereto, but which first may require the removal of an access panel, door, or similar obstruction.

Question 60

Where the design and free area are not known, it shall be assumed that wood louvers will have___________percent free area.

Answer 60

25 percent

The required size of openings for combustion, ventilation, and dilution air shall be based on the net free area of each opening. Where the free area through a design of louver, grille, or screen is known, it shall be used in calculating the size opening required to provide the free area specified.
Where the louver and grille design and free area are not known, it shall be assumed that wood louvers have 25 percent free area and metal louvers and grilles have 75 percent free area. Nonmotorized louvers and grilles shall be fixed in the open position. [NFPA 54:9.3.7.1]
(NFPA 54: National Fuel Gas Code)

Question 61

No water closet or bidet shall be set closer than ____________inches center to center to any similar fixture.

Answer 61

30 inches

Fixtures shall be set level and in proper alignment with reference to adjacent walls. No water closet or bidet shall be set closer than15 inches (381 mm) from its center to a side wall or obstruction nor closer than 30 inches (762 mm) center to center, to a similar fixture.
The clear space in front of a water closet or bidet shall be not less than 24 inches (610 mm). No urinal shall be set closer than 12 inches (305 mm) from its center to a side wall or partition nor closer than 24 inches (610 mm) center to center.

Question 62

Where potable water is discharged to the drainage system it shall be by means of an approved airgap of____________pipe diameters of
the inlet.

Answer 62

2 pipe diameters

Direct connections between potable water piping and sewer-connected wastes shall not be permitted to exist under any condition with or without backflow protection. Where potable water is discharged to the drainage system, it shall be by means of an approved air gap of two pipe diameters of the supply inlet, but in no case shall the gap be less than 1 inch (25.4 mm). Connection shall be permitted to be made to the inlet side of a trap provided that an approved vacuum breaker is installed not less than 6 inches (152 mm), or the distance according to the device’s listing, above the flood-level rim of such trapped fixture, so that at no time will such device be subjected to backpressure.

Question 63

Vent pipes for outdoor installations shall extend at least____________feet above the surrounding ground and shall be securely supported.

Answer 63

10 feet

Vent pipes for outdoor installations shall extend not less than10 feet (3048 mm) above the surrounding ground and shall be securely supported.

Question 64

Closet rings shall be approximately____________ inches in diameter and present a 1-1/2 inch wide flange to receive the fixture gasket.

Answer 64

7 inches

Closet rings (closet fianges) for waher closets or similar fixtures shall be of an approved type and shail be copper alloy, copper. hard lead, cast-iron, galvanized maleatie iron, ABS. PVC, or other approved materials. Each such closet ing (closet flange shall be approximately 7 inches (176 m) in diameter and, where instailed, shall, together with the soil pipe. present a 1-1/2 inch (38 mm)wide flange or face to receive the future gasket or closet seal.

Question 65

Every abandoned building (house) sewer, or part thereof, shall be plugged or capped in an approved manner within_________feet of the
property line.

Answer 65

5 feet

An abandoned building (house) sewer, or part thereof, shall be plugged or capped in an approved manner within 5 feet (1524 mm)of the property line.

Question 66

The vertical piping between any two (2) consecutive inlet levels shall be considered a___________vented section.

Answer 66

Wet

The vertical piping between two consecutive inlet levels shall be considered a wet-vented section. Each wet-vented section shall be not less than one pipe size exceeding the required minimum waste pipe size of the upper fixture or shall be one pipe size exceeding the required minimum pipe size for the sum of the fixture units served by such wet-vented section, whichever is larger, but in no case less than 2 inches (50 mm) in diameter.

Question 67

The use of ladders for the removal of bulky equipment in order to service interceptors (clarifiers) shall constitute a violation of:

Answer 67

Accessibility

Each interceptor (clarifier) cover shall be readily accessible for servicing and maintaining the interceptor (clarifier) in working and operating condition. The use of ladders or the removal of bulky equipment in order to service interceptors (clarifiers) shall constitute a violation of accessibility. Location of interceptors (clarifiers) shall be shown on the approved building plan.

Question 68

No water closet or bidet shall be set closer than________ inches from its center to any side
wall or obstruction.

Answer 68

15 inches

Fixtures shall be set level and in proper alignment with reference to adjacent walls. No water closet or bidet shall be set closer than15 inches (381 mm) from its center to a side wall or obstruction nor closer than 30 inches (762 mm) center to center, to a similar fixture.
The clear space in front of a water closet or bidet shall be not less than 24 inches (610 mm). No urinal shall be set closer than 12 inches (305 mm) from its center to a side wall or partition or closer than 24 inches (610 mm) center to center.

Question 69

The intake to medical air compressors shall be located a minimum distance of_____________feet
from any door, window, another intake, or opening in the building.

Answer 69

10 feet

(3) The medical air intake shall be located a minimum of 10 feet (3048 mm) from any door, window, or other opening in the building.
[NFPA 99:5.1.3.6.3(B-D)]
(NFPA 99: Health Care Facilities Code)

Question 70

All valves must be________________.

Answer 70

Accessible

Valves shall be accessible.

Question 71

Aboveground and underground building drainage and vent pipe and fittings for gray water systems must extend a min. of_______________outside the building.

Answer 71

2 feet

Aboveground and underground building drainage and vent pipe and fittings for gray water systems shall comply with the requirements for aboveground and underground sanitary building drainage and vent pipe and fittings in this code. These materials shall extend not less than 2 feet (610 mm) outside the building.

Question 72

What is the approved method of labeling for medical gas systems?

Answer 72

Adhesive markers or stenciling

Piping shall be labeled by stenciling or adhesive markers that identify the patient medical gas or medical vacuum system and include the following:
(1) The name of the gas or vacuum system or the chemical symbol per
Table 1305.1.
(2) Gas or vacuum system color code per Table 1305.1.
(3) Where positive-pressure gas piping systems operate at pressures other than the standard gauge pressure in Table 1305.1, the operating pressure in addition to the name of the gas. [NFPA 99:5.1.11.1.1]
(NFPA 99: Health Care Facilities Code)

Question 73

Where the design and free area are not known, it shall be assumed that metal louvers and grilles will have_____________percent free area.

Answer 73

75 percent

The required size of openings for combustion, ventilation, and dilution air shall be based on the net free area of each opening. Where the free area through a design of louver, grille, or screen is known, it shall be used in calculating the size opening required to provide the free area specified.
Where the louver and grille design and free area are not known, it shall be assumed that wood louvers have 25 percent free area and metal louvers and grilles have 75 percent free area. Nonmotorized louvers and grilles shall be fixed in the open position. [NFPA 54:9.3.7.1]
(NFPA 54: National Fuel Gas Code)

Question 74

Each vent pipe or stack shall extend through its flashing and shall terminate vertically not less than______________inches above the roof.

Answer 74

6 inches

Each vent pipe or stack shall extend through its flashing and shall terminate vertically not less than 6 inches (152 mm) above the roof nor less than 1 foot (305 mm) from a vertical surface. ABSand PVC piping exposed to sunlight shall be protected by waterbased synthetic latex paints.

Question 75

Piping for medical gas systems in excess of 185 psig shall be Type_____________copper.

Answer 75

K

Tubes shall be hard-drawn seamless copper ASTM B819 medical gas tube, Type L, except Type K shall be used where operating pressures exceed a gauge pressure of 185 psi (1276 kPa), Type K must be used for sizes exceeding DN80 [(NPS 3) (3-1/8” O.D.)]. ASTM B819 medical gas tube shall be identified by the manufacturer’s markings “OXY,” “MED,”
“OXY/MED,” “OXY/ACR,” or “ACR/MED” in blue (Type L) or green (Type
K). [NFPA 99:5.1.10.1.4 - 5.1.10.1.5]
(NFPA 99: Health Care Facilities Code)

Question 76

When testing with water, the water shall be kept in the system, or in the portion under test, for in at least___________minutes before inspection starts.

Answer 76

15 minutes

The water test shall be applied to the drainage and vent systems either in its entirety or in sections. Where the test is applied to the entire system, openings in the piping shall be tightly closed, except the highest opening, and the system filled with water to point of overflow.
Where the system is tested in sections, each opening shall be tightly plugged, except the highest opening of the section under test, and each section shall be filled with water, but no section shall be tested with less than a 10 foot head of water (30 kPa). In testing successive sections, not less than the upper 10 feet (3048 mm) of the next preceding section shall be tested, so that no joint or pipe in the building (except the uppermost 10 feet (3048 mm) of the system) shall have been submitted to a test of less than a 10 foot (30 kPa) head of water.
The water shall be kept in the system, or in the portion under test, for not less than 15 minutes before inspection starts. The system shall then be tight at points.

Question 77

The piping of the plumbing, drainage, and venting systems shall be tested with water or___________.

Answer 77

Air

The piping of the plumbing, drainage, and venting systems shall be tested with water or air except that plastic pipe shall not be tested with air. The Authority Having Jurisdiction shall be permitted to require the removal of cleanouts, etc., to ascertain whether the pressure has reached all parts of the system. After the plumbing fixtures have been set and their traps filled with water, they shall be submitted to a final test.

Question 78

Horizontal drainage piping shall be run in practical alignment and a uniform slope of not less than_____________of an inch per foot or 2
percent toward the point of disposal.

Answer 78

1/4 inch

Horizontal drainage piping shall be run in practical alignment and a uniform slope of not less than 1/4 inch per foot (20.8 mm/m) or 2 percent toward the point of disposal provided that, where it is impractical due to the depth of the street sewer, to the structural features or to the arrangement of a building or structure to obtain a slope of 1/4 inch per foot (20.8 mm/m) or 2 percent, such pipe or piping 4 inches (100 mm) or larger in diameter shall be permitted to have a slope of not less than 1/8 inch per foot (10.4 mm/m) or 1 percent, where first approved by the Authority Having Jurisdiction.

Question 79

The clear space in front of any water closet or bidet shall not be less than____________inches.

Answer 79

24 inches

Fixtures shall be set level and in proper alignment with reference to adjacent walls. No water closet or bidet shall be set closer than 15 inches (381 mm) from its center to a side wall or obstruction nor closer than 30 inches (762 mm) center to center, to a similar fixture.
The clear space in front of a water closet or bidet shall be not less than 24 inches (610 mm). No urinal shall be set closer than 12 inches (305 mm) from its center to a side wall or partition nor closer than 24 inches (610 mm) center to center.

Question 80

In single dwelling units, the ejector or pump shall be capable of passing a___________inch diameter solid ball.

Answer 80

1-1/2 inch

(2) In single dwelling units, the ejector or pump shall be capable of passing a 1-1/2 inch (38 mm) diameter solid ball, and the discharging piping of each ejector or pump shall have a backwater valve and gate valve, and be not less than 2 inches(50 mm) in diameter.

Question 81

Cleanouts in piping larger than 2 inches shall have a clearance of not less than ___________ inches in front of the cleanout.

Answer 81

18 inches

Each cleanout in piping 2 inches (50 mm) or less in size shall be so installed that there is a clearance of not less than 18 inches (457 mm) by 18 inches (457 mm) in front of the cleanout. Cleanouts in piping exceeding 2 inches (50 mm) shall have a clearance of not less than 24 inches (610 mm) by 24 inches (610 mm) in front of the cleanout. Cleanouts in under-floor piping shall be extended to or above the finished floor or shall be extended outside the building where there is less than 18 inches (457 mm) vertical overall, allowing for obstructions such as ducts, beams, and piping, and 30 inches of (762 mm) horizontal clearance from the means of access to such cleanout. No under-floor cleanout shall be located exceeding 5 feet (1524 mm) from an access door, trap door, or crawl hole.

Question 82

What is the size of the visible lettering on signage for each room that contains alternate water source non-potable water and equipment?

Answer 82

1 inch

Each room containing reclaimed (recycled) water and on-site treated water equipment shall have a sign posted in a location that is visible to anyone working on or near nonpotable water equipment with the following wording in 1 inch (25.4 mm) letters:

Question 83

A fullway valve shall be installed on the__________ water supply pipe to each water heater at or near the water heater.

Answer 83

Cold

A fullway valve controlling outlets shall be installed on the discharge side of each water meter and on each unmetered water supply. Water piping supplying more than one building on one premises shall be equipped with a separate fullway valve to each building, so arranged that the water supply can be turned on or off to an individual or separate building provided; however, that supply piping to a single-family residence and building accessory thereto shall be permitted to be controlled on one valve. Such shutoff valves shall be accessible. A fullway valve shall be installed on the discharge piping from water supply tanks at or near the tank. A fullway valve shall be installed on the cold water supply pipe to each water heater at or near the water heater.

Question 84

Any branch more than____________feet in length
shall be separately vented in an approved manner.

Answer 84

15 feet

Each combination waste and vent system, as defined in Chapter2, shall be provided with a vent or vents adequate to ensure free circulation of air. A branch exceeding 15 feet (4572 mm) in length shall be separately vented in an approved manner. The area of a vent installed in a combination waste and vent system shall be not less than one-half the inside cross-sectional area of the drain pipe served. The vent connection shall be downstream of the uppermost fixture.