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Quiz Session - Attempts With Random Questions

NITC Journey Level Plumber Exam Questions

Page 6 of 25

101.

Handheld showers must have a(n):

  • internal backflow preventer

  • bracket

  • flow restrictor

  • removable aerator 

Correct answer: internal backflow preventer

Handheld showers must have an internal backflow preventer.

This is the same concept as any siphonage or black flow. The possibility being a handheld shower could be submersed in a receptor which could then allow water to backflow into the potable water system. That's where an internal check valve comes into the mix. Most manufacturers have these built in. The bracket, flow restrictor, and the aerator are all components of the handheld but do not fit the term required.

102.

When there is a PVC female that needs to be attached, the male threads must be made of what material?

  • Plastic

  • Stainless steel

  • Brass 

  • Galvanized steel

Correct answer: Plastic

When there is a PVC female that needs to be attached, the male threads must be made of plastic.

If any other material is used, the risk of expanding the fitting and spitting the female adapter is very probable. 

103.

In cases where the fuel gas may be heavier than the air, vents for regulators must be ran:

  • outside

  • below ground

  • in a chase

  • nowhere

Correct answer: outside

In situations where the fuel gas is heavier than the air around it, the vent from the regulator must be run outside and no other approved places. It cannot be run underground, in a chase, and it must terminate outside.

104.

The                     is a vertical drainage pipe that is used for receiving the discharge of storm water drains and gutters. 

  • leader

  • waste

  • vent 

  • drain

Correct answer: leader

The leader is strictly involved with storm water systems and gutter systems. The other three items are directly related to building drains and not storm systems. 

105.

Flexible connectors for water systems must always be installed in                  areas.

  • accessible 

  • wet

  • public

  • private

Correct answer: accessible 

These connectors must be installed in areas that are accessible. These are not permanent fittings and may need to be changed sooner than more permanent connections. The other areas are not acceptable, because the concept here is accessible. 

106.

Which of the following would require a permit to be pulled when working on a plumbing system?

  • Water heater

  • Leak on a drain

  • Leak on the water supply system

  • Drain cleaning 

Correct answer: Water heater 

The water heater is the only listed scope of work that would require a permit to be pulled. The leak on the drain and the water system are both exempt from needing a permit, along with the drain cleaning. This also does not need a permit.

107.

How often must PVC/ABS be supported horizontally?

  • 4 feet

  • 5 feet

  • 6 feet

  • 8 feet

Correct answer: 4 feet

No matter the size of the PVC/ABS, they must be supported every 4 feet and not more. Supports may be added more frequently, but they must not exceed the 4 foot rule. 

108.

What is the minimum required distance of an approved air gap?

  • 1 inch

  • 2 inches

  • 3 inches 

  • 4 inches 

Correct answer: 1 inch

When a fixture requires to be discharged by indirect waste, the minimum distance required for the air gap is 1 inch. It may be more but not less than 1 inch. 

109.

If a fixture has any slip joint connections and is concealed, what must be done?

  • It must have an access panel.

  • The joints must be tight.

  • It must be inspected yearly.

  • None of the above

Correct answer: It must have an access panel.  

Slip joint connections do not need to be inspected yearly, but they can be known to shift over time, which is why they need to be accessible for repair or replacement. 

110.

A(n)                    is best described as a combination of elbows in a line of piping that brings one section of piping out of a line but into a line that runs parallel with the existing piping.

  • offset

  • splice

  • rearrangement 

  • tie in 

Correct answer: offset

An offset is best described as the combination of elbows that brings one section of the piping out of a line but then runs parallel with the existing pipe. The term splice, and rearrangement, and tie in are unorthodox methods of communicating the above, but the proper term, per the code book, is an offset.  

111.

What is the permitted way to secure a wall-mounted water closet?

  • Carrier

  • Cast Iron piping 

  • Support under water closet

  • Studs

Correct answer: Carrier

The carrier systems are required for any wall-hung water closet. This allows for the drain and the bolts to secure the toilet from being free of any supports on the finished side. Although the piping can be cast iron, the carrier is additional. The other two items are not sufficient ways to secure a water closet. 

112.

When an inspection fails, what must occur?

  • Reinspection

  • Take the system off test

  • Cover up the system

  • Move on to the next phase of work

Correct answer: Reinspection

When the inspection does not pass, it must be reinspected. There sometimes are fees that are involved depending on the jurisdiction. When calling in to get something inspected, always make sure that everything is ready and good to go.

113.

Which method is a way to preserve a trap seal?

  • Trap primer

  • Grease trap

  • Building trap 

  • Relief vent

Correct answer: Trap primer 

A trap primer is a device that supplies potable water to the floor, utilizing an air gap to protect the cross connection. This ensures that the trap won't dry up and remains sealed.

The other answers are the types of receptacles in the drain system.  

114.

Gas _______ must be selected for maximum expected pressure and permissible pressure drop.

  • meters

  • regulators 

  • valves

  • appliances

Correct answer: meters

Although this is something that the gas providers are usually responsible for, it is good to know the rules behind why certain meters are used in different applications. Regulators are installed prior to the meter, and valves and the appliances are designed for the standard manufacturing specs. 

115.

What is the best practice to prevent siphonage on a standard hose bib?

  • Vacuum breaker

  • Double check 

  • Spring check

  • Atmospheric vacuum breaker

Correct answer: Vacuum breaker

Threaded vacuum breakers have hose threads and can be threaded directly onto the hose bib. They must be able to be locked into the device for tamper resistance.

The other items would technically work but are not designed for that use.

116.

What qualification must a point of entry water softener be rated for?

  • NSF 44

  • NSF 55

  • NSF 61

  • NSF 62

Correct answer: NSF 44

A point of entry water softener must be rated NSF 44.

(Refer to 2021 UPC Table 611.1)

117.

Which of the following must have a full way valve installed?

  • Cold inlet on water heater

  • Hot outlet on water heater

  • Cold inlet on water softener

  • Cold outlet on water softener

Correct answer: Cold inlet on water heater

Full way valves must always be installed on the inlet of the cold on a water heater. They are permitted to be installed in the other scenarios below but these are additional to what the code requires. 

118.

In a two permanent opening method, how many inches must the top opening be from the top of the appliance enclosure?

  • 12 inches

  • 10 inches

  • 8 inches

  • 6 inches 

Correct answer: 12 inches

In the two permanent opening methods, for combustion air, the distance from the top of the appliance enclosure to the upper opening must be 12 inches, no more or no less. 

119.

Best practices require that the end of any pipe be reamed and free of any debris. The main purpose of this is to: 

  • allow free flow through the pipe 

  • avoid injuries

  • trim the pipe to the proper length

  • make the pipe fit securely 

Correct answer: allow free flow through the pipe 

Although the other items can be important, the sole and main reason for reaming the pipe is allowing free flow through the pipe. By doing so, you may achieve the other listed reasons, but it does not state those as the main reason.

120.

What is the maximum length of a standpipe for a clothes washer? 

  • 30 inches 

  • 48 inches

  • 36 inches

  • 42 inches 

Correct answer: 30 inches

The standpipe for a washer cannot be any less than 18 inches and no more than 30 inches above the weir of the trap. 

(Refer to 2021 UPC 804.1)

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