PLUMBING PART 3 with rationals

One trap arm may serve a total of how many P-traps? a. 3 b. 1 c. 2 d. 4

1

The minimum vertical distance from the bottom of an indirect drain line to its receptor's flood rim is _____________________________. a. 1" b. ¾" c. ½" d. 2"

1"

The minimum depth thickness for a water heater drip pan is __________________________. a. 1" b. 1.5" c. 3/4" d. 2"

1.5"

What is the typical amount of grade required per liner foot on a household drainage pipe? a. 1/8 inch b. 1/4 inch c. 3/4 inch d. 1 inch

1/4 inch

What is the likely height of a handicap toilet? a. 13 inches b. 15 inches c. 1c d. 22 inches

18 inches

What is the minimum unobstructed opening of egress when a shower door is installed for a typical shower? a. 22 inches b. 24 inches c. 28 inches d. 30 inches

22 inches

Piping for building drains and horizontal drainage branches require the installation of cleanouts. Spacing for these cleanouts is determined by the diameter of the drain and other factors. In this scenario the drain pipe diameter is three inches. This drain has a running length of 77 feet. During this run the pipe takes one 90-degree turn. How many cleanouts are required for this installation? a. 2 b. 3 c. 4 d. 6

3

You are connecting two back to back lavatories, two urinals and two water closets to one horizontal branch. What are the maximum number fixtures that can be connected to a horizontal branch? a. 3 b. 4 c. 6 d. 8

8

Water heaters, hose bibs and sill cocks are normally protected from backflow with ________. a. An air gap b. An air break c. A vacuum breaker d. A reduced-pressure backflow preventer

A vacuum breaker

Flexible water connections are required to be _________. a. Readily accessible b. Accessible c. Limited to first-floor installations d. Supported

Accessible

Which of the following is considered to be the best method for connecting an indirect waste to a sanitary drainage system? a. Air gap b. Air break c. Both a and b are equal d. None of the above

Air gap

Which of the following is suitable for testing a DWV system for leaks? a. Air b. Water c. Smoke d. All of the above

All of the above

Where is the maximum allowable working pressure of a storage tank and water heater required to be shown? a. In the installation guide b. Stamped in the metal c. On a permanently attached plate d. Either b or c

Either b or c

All pipe used in plumbing applications will have all of the following markings except: a. Pressure rating in psi b. Nominal pipe size c. Length of pipe d. Manufacturer's brand name

Length of pipe

In Med Gas systems, the exhaust from vacuum pumps must be discharged into the following: a. Designated receptor b. Indirect drain c. Outdoors d. Relief vent

Outdoors

A plumbing permit is required for the replacement of which of the following? a. Water closet b. Water heater c. Bathing unit d. Faucet

Water heater

What will result when a 4 inch pipe is reduced in size in the direction of the flow? a. The waste will travel faster which will allow for better cleaning of the pipe. b. This could cause blockage to build up at the reduction point. c. This could cause slugging in the waste system. d. This will have no affect on the drainage system.

b. This could cause blockage to build up at the reduction point.

Which of the following types of fixtures can be served by a combination-waste-and-vent system? a. Urinals b. Toilets c. Sinks d. Bidets

sinks

Flux can only be used in the brazing process when: a. Brazing copper to brass b. Brazing copper to copper c. Not allowed d. Both a and b

Brazing copper to brass

The provisions for licensing are determined by which of the following: a. State Board of Plumbing b. Authority having jurisdiction c. Plumbing inspector d. The responsible master plumber

Authority having jurisdiction