Deck 19: Plumbing Traps

Question 1

Slip joint-type traps must be in accessible locations.

Answer 1

True

Question 2

All floor drains require a 4" deep seal trap.

Answer 2

False

Question 3

The loss of trap seal caused by the back and forth movement of water sending the seal water over the crow weir is called ____.

A) momentum
B) oscillation
C) aspiration
D) capillary action

Answer 3

B

Question 4

Urinals are required to have integral traps.

Question 5

The typical trap seal is ____ deep.

A) 1inchs
B) 2 inches
C) 2inches
D) 3 inches

Question 6

Most codes limit trap seal depth to a maximum of ____.

A) 2 inches
B) 3 inches
C) 4 inches
D) 5 inches

Question 7

A plumbing trap is a device that prevents the passage of sewer gas into the structure.

Question 8

Traps should be one piece, without joints, for maximum trap integrity.

Question 9

Most of the causes of trap seal loss can be minimized or prevented by proper drainage and venting installations.

Question 10

____ is the loss of trap seal from negative pressure at the trap outlet.

A) Oscillation
B) Momentum
C) Capillary action
D) Siphonage

Question 11

A device that periodically adds water to a trap is a ____.

A) P-trap
B) hydraulic pump
C) S-trap
D) trap primer

Question 12

A trap primer is a device that maintains the water seal in a trap.

Question 13

Traps should always be smaller than the fixture outlet.

Question 14

Except for interceptors, the trap seal should be between ____ and ____.

A) 1 inch, 3 inches
B) 2 inches, 4 inches
C) 3 inches, 5 inches
D) 4 inches, 6 inches

Question 15

The ____ is the vertical distance between the top of the trap dip and the crown weir.

A) developed length
B) inlet
C) outlet
D) trap seal

Question 16

Evaporation is a cause of trap seal loss that cannot be prevented by correct venting.

Question 17

Another name for a building trap is a ____.

A) running trap
B) drum trap
C) partition trap
D) bell trap

Question 18

Which of the following is a permitted trap?

A) ball trap
B) partition trap
C) P-trap
D) S-trap

Question 19

____ is the loss of trap seal caused when water in the trap changes from liquid to vapor state and is lost from the trap.

A) Evaporation
B) Condensation
C) Aspiration
D) Oscillation