UPC: Ch 10 Traps and Interceptors

Each plumbing fixture, except for those having integral traps. shall be _______________.

a. separately trapped by an approved liquid seal trap

b. drained by means of an indirect waste line

c. connected directly to the building drain without a trap

d. illegal and should not be used

A

One trap may serve a set of not more than _______________ single compartment sinks.

a. two

b. one

c. three

d. four

C

A food waste disposal unit installed in restaurant, commercial, or industrial sinks __________________.

a. may share a common trap

b. must be separately trapped

c. should be indirectly wasted

d. need not be trapped

B

The maximum vertical distance for a tailpiece allowed between a ?xture and the trap weir is _________________.

a. 6 inches

b. 12 inches

c. 18 inches

d. 24 inches

D

Each plumbing fixture trap shall be protected against siphonage and backpressure by a ___________________________.

a. sanitary tee

b. vent pipe

c. air admittance device

d. backflow preventer

B

A trap arm smaller than 3 inches may change direction without a cleanout if the change in

direction does not exceed __________________.

a. 30 degrees

b. 45 degrees

c. 90 degrees

d. 180 degrees

C

The vent pipe opening from a soil or waste pipe, except for water closets and similar fixtures, _______________________.

a. may be below the trap weir

b. shall not be below the weir of the trap

c. must be below the weir of the trap

d. does not need a vent

B

The developed length of a 2" trap arm, from the trap weir to the inner edge of the vent shall not exceed __________________ feet.

a. 3

b. 5

c. 6

d. 10

B

Each trap, except for traps within interceptors or similar devices, _________________.

a. shall be self-cleaning

b. shall be one pipe size smaller than the fixture outlet

c. shall have a cleanout on the bottom of the trap

d. need not be vented

A

No more than ____________ approved slip joint fitting(s) may be used on the outlet side of a trap.

a. one

b. two

c. three

d. four

A

The size of the trap connected to a fixture shall be sufficient to drain the fixture rapidly but _______________.

a. in no case smaller than the fixture drain

b. not more than one size larger than the fixturedrain

c. may be the same size as the trap arm to which it is connected

d. all of the above

D

No trap shall be used that _________________.

a. depends on movable parts for its seal

b. has, with some exceptions, concealed interior partitions

c. is classified as an S-trap or bell trap

d. all of the above

D

Each fixture trap shall have a water seal of _____________________.

a. not less than 2 inches

b. not more than 4 inches

c. both A and B

d. none of the above

C

Floor drains shall connect into a trap so constructed that it can be __________________.

a. accessible

b. easily removed

c. readily cleaned

d. none of the above

C

Floor drains or similar traps directly connected to the drainage system and subject to

infrequent use shall be ________________________.

a. primed weekly, except when not deemed necessary by the AHJ

b. covered when not in use, except when not deemed necessary by the AHJ

c. protected with an accessible trap seal primer, except when not deemed necessary by the AHJ

d. prohibited

C

Each building trap when installed shall be provided with ________________.

a. a cleanout

b. a relieving vent or fresh air intake on the inlet side of the trap

c. both A and B

d. none of the above

C

Interceptors shall be provided when, in the judgment of the AHJ, they are necessary for the proper handling of liquid wastes containing __________________.

a. grease and flammable wastes

b. sand and/or solids

c. acid or alkaline substances

d. all of the above

Interceptors for sand and similar heavy solids shall have a water seal of not less than ________________________.

a. 4 inches

b. 6 inches

c. 8 inches

d. 10 inches

B

lnterceptors shall ________________________.

a. be properly vented

b. have covers that are readily accessible for service and maintenance

c. be placed above ground

d. both A and B apply

D

Every public or private wash rack and floor or slab used for cleaning machinery or machine

parts shall ____________________.

a. be adequately protected against storm or surface water

b. drain or discharge into the main

sewer system

c. drain or discharge into an approved interceptor

d. both A and C

D

Laundry equipment in commercial buildings that do not have integral strainers shall discharge

into an interceptor having a wire basket or similar device that will prevent the passing of solids

_________________ or larger in maximum dimension.

a. 1/4 inch

b. 1/8 inch

c. 1/2 inch

d. 3/4 inch

C

The Authority Having Jurisdiction has mandated grease pretreatment for the following fixtures: four non- emergency floor drains, two commercial food prep sinks, one service sink with a 3-inch trap, and two dishwashers discharging 20 gallons per minute each. The minimum size gravity grease interceptor in gallons required shall be ____________________.

a. 500

b. 750

c. 1000

d. 1,250

C

Each plumbing fixture connected to a type A and B hydro-mechanical grease interceptor shall

be provided with a ______________________________.

a. vent terminating to the atmosphere made the building (turn down with screen)

b. flow control device

c. gate valve

d. removable cover

B

Each fixture discharging into a gravity grease interceptor shall be____________________.

a. in the same room

b. Individually trapped and vented

c. readily accessible

d. approved for that use

B

The total capacity in gallons of fixtures discharging into any hydro-mechanical grease

interceptor shall not exceed times the certified gpm flow rate.

a. 1-1/2

b. 2

c. 2-1/2

d. 3

C

Sand interceptors shall be required __________________________.

a. whenever the discharge of a fixture or drain may contain solids or semisolids heavier than water that would be harmful to the drainage system

b. whenever the AHJ deems it advisable to protect the drainage system

c. both A and B

d. none of the above

C

The sand interceptor shall have a minimum dimension of _______________ square feet for the net free opening of the inlet section and a minimum depth under the invert of the outlet pipe of _________________ feet

a. 1-1/2, 1-1/2

b. 2-1/2, 2-1/2

c. 2, 2

d. 3, 3

C

Sand and similar interceptors shall have a water seal of not less than ___________ inches.

a. 4

b. 6

c. 8

d. 10

B

Repair garages and gas stations with grease racks or grease pits and all factories; that have

oily and/or flammable wastes shall be provided with an oil or flammable liquid interceptor

that shall ___________________.

a. be connected to necessary floor drains

b. have a separation or vapor compartment independently vented to the outer air

c. have a flammable vapor vent not less than 2 inches

d. all of the above

D

Oil and flammable liquid interceptors not rated by the manufacturer shall have a depth of not

less than ____________ feet below the invert of the discharge drain and an outlet opening with not less than ______________ inch water seal.

a. 1-1/2, 12

b. 2, 18

c. 2-1/2, 24

d. 3, 36

B

If the Authority Having Jurisdiction determines that a grease interceptor is not being properly

cleaned, the Authority Having Jurisdiction has the authority to mandate ________________.

a. hiring more employees

b. firing the manager

c. a maintenance program

d. less grease to

be used

C

A ____________________ shall be installed downstream of hydromechanical grease interceptor in accordance with the requirements of this code.

a. check valve

b. vent

c. backflow preventer

d. filter

B

Gravity grease interceptors shall not be installed in any part of the building where ___________________.

a. laundry is handled

b. food is handled

c. there is public access

d. the fixture served is on

the second floor

B

The volume of the gravity interceptor shall be determined by using _________________.

a. Table 313.1

b. Table 1014.2.1

c. Table 1014.3.6

d. Table 610.3

C

Gravity grease interceptors shall be placed as close as practical to the _________________.

a. fixtures they serve

b. soil pipe

c. system vents

d. egress doors

A

It is recommended that a ___________________ be located at the outlet end of all gravity grease interceptors.

a. pH monitor

b. C02 monitor

c. sight glass

d. sample box

D

Abandoned grease interceptors shall be __________ and __________ as required for abandoned sewers and sewage disposal facilities.

a. broke up, removed

b. pumped, filled

c. painted, sealed

d. cleaned, reused

B

Water closets and urinals shall ____________ into or through a grease interceptor.

a. drain

b. directly connect

c. indirectly connect

d. not drain

D

Listed _______________ may be used to connect listed metal tubing traps.

a. male adapters

b. female adapters

c. PEX adapters

d. plastic trap adapters

D

Grease interceptors shall at all times be ______________ for inspection, cleaning and removal of grease.

a. easily accessible

b. labeled with instructions

c. documented by the manufacturer

d. open

A