×

Quiz Session - Attempts With Random Questions

NITC Journey Level Plumber Exam Questions

Page 9 of 25

161.

When a gas appliance is removed from the system, the gas line must be:

  • capped

  • tested 

  • purged

  • readily accessible 

Correct answer: capped 

If the gas line is going to be abandoned for any period of time, the line must be capped and gas-tight.

162.

How many floors can water supply risers travel without isolation valves, on multi-level dwellings?

  • One floor

  • Two floors

  • Three floors

  • Four floors 

Correct answer: One floor

Any time a water riser that travels two or more floors, it must have its own dedicated valve. The exception is when the risers are in individual dwellings and only serve fixtures in that unit. 

163.

When underground piping is installed, when is it allowed to be covered up and backfilled?

  • After it is tested and inspected 

  • After it is tested and bedded

  • After the glue dries, and its tested

  • As it is installed

Correct answer: After it is tested and inspected 

This can only be done after it is tested and inspected. The piping must be exposed and bedded properly in order to be tested and inspected, then after the Authority Having Jurisdiction signs off on it. Only then can it be backfilled.

164.

Hose bibs require what type of back flow device?

  • Vacuum breakers

  • Reduced pressure zone assembly 

  • Double check valve 

  • Check valve 

Correct answer: Vacuum breakers

There are two different variations when it comes to vacuum breakers and hose bibs. One is considered a frost proof hose bib that usually has a vacuum breaker built into the top of it. The other version is a standard hose bib where a threaded vacuum breaker can be threaded onto the outlet. The double check valve and the reduced pressure zone assembly are utilized for higher risk cross connections such as a sprinkler system or for an auto fill for a pool.

165.

Who is in charge of authorizing a permit?

  • Authority having jurisdiction

  • Inspector

  • Builder

  • State plumbing board

Correct answer: Authority having jurisdiction

Although the other three parties have very important roles in the process of licensing and permitting, only the authority having jurisdiction will sign off and authorize the work to commence. 

166.

What does the code establish?

  • Minimum requirements and standards

  • OSHA guidelines

  • Best practices

  • Plumbing defects

Correct answer: Minimum requirements and standards

The code is an ordinance that establishes the minimum requirements that are required to ensure safety for public health, safety, and welfare.

OSHA guidelines, while also very important, do not set the standard on how plumbing systems should be installed. The code does not establish best practices nor does it deal with plumbing defects.

167.

When installing an air gap for an indirect waste system, what must the distance of the air gap be?

  • 1 inch 

  • Flush with the receptor

  • 1/2 inch

  • Below the flood rim 

Correct answer: 1 inch

1 inch is the minimum threshold for the air gap distance. This can be a distance of more than 1 inch but no less. 

168.

If a water heater is not equipped with a flammable vapor switch, how high must it be elevated in a garage?

  • 18 inches

  • 12 inches

  • 24 inches

  • 30 inches 

Correct answer: 18 inches

If the water heater is not equipped with a flammable vapor switch, then it must be elevated to 18 inches off of the garage floor to protect the system from any flammable vapors in a garage being ignited. It can be higher if that allows, but it cannot be any less than 18 inches. 

169.

The receptor that receives the discharge from the drainage system and is designed to retain solids and disperse the remaining liquids through an approved system is best described as a:

  • septic tank

  • seepage pit

  • sewage pit

  • sewage pump 

Correct answer: septic tank

The septic tank is usually found in areas where there is not a public sewer, usually in more rural areas or larger lots. The concept of septic systems is to collect the solids and they will naturally digest the organic matter, while the liquids pass through and disperse through a seepage pit (sometimes commonly known as a leech field).

170.

The building water service must have a                        accessible valve. 

  • readily 

  • partially 

  • buried

  • easy

Correct answer: readily 

The concept of readily accessible is a repeated concept that is very important in so many aspects of the code. Every water service must have a readily accessible valve that can turn of the building in the event of a repair or emergency. 

171.

The plumbing must be installed with regard and preservation of the strength and structural members. Which principle is this?

  • Structural safety

  • Light and ventilation

  • Proper maintence 

  • Test the system

Correct answer: Structural safety

Anytime the plumbing system is installed or modified, these practices must always apply. Craftsmanship is apart from the code and it must be at the forefront of any installation.

172.

Which of the fixtures below is allowed to be without a vent when the limitations of the construction allow it?

  • Bar sinks

  • Hand sinks

  • Kitchen sink

  • Mop sink

Correct answer: Bar sinks

Sinks that are attached to bar cabinets and soda fountains are allowed to be ventless due to the limitations and construction of the fixtures. These wastes must use an indirect waste as the outlet receptor. 

173.

What is the max water pressure that is allowed before needing a pressure-reducing valve?

  • 80 psi

  • 60 psi 

  • 65 psi 

  • 75 psi 

Correct answer: 80 psi 

This is a very common issue seen throughout many jurisdictions. Any pressure above 80 psi can cause wear and tear on systems, causing things to fail much sooner. The Authority Having Jurisdiction (AHJ) can have different thresholds for what their baseline is, but it is best to use 80 psi as the threshold.

174.

Who must be notified when the installation, alteration, or repair of any gas piping is completed?

  • Authority Having Jurisdiction

  • County 

  • Gas company 

  • Homeowner

Correct answer: Authority Having Jurisdiction 

The Authority Having Jurisdiction (AHJ) can vary. Sometimes it is the city, a gas company, or another organization. It is imperative that you identify who the AHJ is prior to starting any work. This helps to make sure that when the time for inspection comes up there is no delay. 

175.

The lowest part of the drainage system which receives waste from soil and waste pipes is called the building:

  • sewer

  • drain 

  • branch

  • vent stack 

Correct answer: sewer

When the building drain conveys inside the dwelling, it is considered the "building drain." When the connection spans 2 feet from the outside of the dwelling, it then transitions to the building sewer. The name changes from the building drain to the building sewer once it extends 2 feet from the outside of the dwelling walls. The others, although a part of the drain system, are not components of the specifics of the building drain or the building sewer. 

176.

Each outlet with non-potable water should be:

  • marked

  • capped

  • abandoned

  • locked

Correct answer: marked

Non-potable taps can be used, but they must be marked with large black lettering to alert those that are using them. 

177.

What is the minimum size softener connection that can be installed on a 4.5 bath house?

  • 1 inch

  • 3/4 inch

  • 1.25 inches

  • 1.5 inches 

Correct answer: 1 inch

The minimum required outlet size for a water softener on a 4.5 bath house would need to be at least 1 inch. It may be larger but not less than 1 inch.  

178.

What is the maximum consumption for a urinal? 

  • 1 gallon

  • 1.28 gallons

  • 1.6 gallons

  • 1.25 gallons 

Correct answer: 1 gallon

Urinals cannot exceed 1 gallon per flush.

(Refer to 2021 UPC 412.0) 

179.

When designing a system,                       fixtures should be accounted for in the design of the original plans.

  • future

  • working 

  • shower

  • cold water

Correct answer: future

If there are future plans to have additional fixtures when designing the system, they must be accounted for and ensure the sizing is designed for the future fixtures as well. They must also be capped off and terminated properly. 

180.

When brazing alloys, what is the max amount of phosphorus that the alloy can contain?

  • 0.05%

  • 1%

  • 0.75%

  • 0.5% 

Correct answer: 0.05%

When brazing alloys, 0.05% is the max amount of phosphorus that the alloy can contain.

×