Fixtures & traps: Washington Journey Level Plumber Practice Questions

Question 1

What is the minimum distance from the center of a water closet to a side wall or partition?

Accepted Answer

15 inches

Answer

18 inches

Answer

21 inches

Answer

12 inches

Question 2

Two water closets are installed side by side. What is the minimum center-to-center spacing?

Accepted Answer

30 inches

Answer

24 inches

Answer

32 inches, measured at the floor flange

Answer

36 inches

Question 3

Under the UPC, what is the minimum clear space in front of a water closet?

Accepted Answer

24 inches

Answer

18 inches

Answer

30 inches

Answer

21 inches

Question 4

What is the maximum flow rate allowed for a showerhead?

Accepted Answer

2.5 gpm at 80 psi

Answer

3.0 gpm at 80 psi, measured with the head fully open

Answer

1.6 gpm at 60 psi

Answer

2.2 gpm at 60 psi

Question 5

What is the maximum flow rate of a lavatory faucet in a public (non-residential) restroom?

Accepted Answer

0.5 gpm

Answer

1.5 gpm

Answer

2.2 gpm

Answer

1.0 gpm when metered

Question 6

Under the UPC, what is the minimum size of a shower compartment?

Accepted Answer

1,024 sq in of floor area, able to hold a 30-inch circle

Answer

720 sq in, at least 24 inches wide

Answer

1,300 sq in, at least 25 inches wide

Answer

900 sq in, at least 30 inches in its smallest dimension

Question 7

A shower measures 30 inches by 32 inches inside. Use the UPC minimum of 1,024 sq in of area with room for a 30-inch circle. Does the shower comply?

Accepted Answer

No, it has only 960 sq in

Answer

No, the circle must be 32 inches

Answer

Yes, it has 960 sq in and holds a 30-inch circle

Answer

Yes, because the 30-inch circle fits

Question 8

Individual shower and tub-shower valves must be pressure-balance, thermostatic or combination types that limit the outlet temperature to no more than:

Accepted Answer

120°F

Answer

110°F

Answer

140°F

Answer

125°F at the head

Question 9

Hot water to a bathtub or whirlpool tub filler must be limited by a device meeting ASSE 1070 (or an equal standard) to no more than:

Accepted Answer

120°F

Answer

105°F

Answer

110°F

Answer

140°F

Question 10

Under the UPC, what is the maximum hot water temperature at a lavatory in a public restroom?

Accepted Answer

120°F, limited by a listed device

Answer

No limit is set for lavatories

Answer

110°F at the water heater only

Answer

140°F

Question 11

A site-built shower floor has a liner under the tile. What minimum slope must the liner and finished floor have toward the drain?

Accepted Answer

1/4 inch per foot

Answer

1/2 inch per foot

Answer

1/16 inch per foot

Answer

1/8 inch per foot

Question 12

Under the UPC, a shower threshold (curb) must be at least how high, measured from the top of the drain?

Accepted Answer

2 inches, and not more than 9 inches

Answer

4 inches, and not more than 12 inches

Answer

1 inch, and not more than 4 inches

Answer

3 inches, with no maximum

Question 13

Under the UPC, what is the minimum trap size for a single-head shower?

Accepted Answer

2 inches

Answer

1-1/2 inches

Answer

1-1/4 inches

Answer

3 inches

Question 14

What is the minimum trap size for a lavatory?

Accepted Answer

1-1/4 inches

Answer

1 inch

Answer

2 inches

Answer

1-1/2 inches

Question 15

What is the minimum trap size for a residential kitchen sink?

Accepted Answer

1-1/2 inches

Answer

2 inches

Answer

1-1/4 inches

Answer

3 inches

Fixtures & traps: Washington Journey Level Plumber Practice Questions

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