Plumber Red Seal Practice Exam

For a specific installation, gas line ____ tables refer to the smallest gas line size.

Before turning horizontal the ____ must be installed as high as possible.

____ GSG metal pipe may be used for an outdoor installed incinerator with the entire venting pipe fully exposed.

Between a combustible surface and a double wall vent pipe is one ____ is the minimum distance that must be maintained.

In gas installations a B pressure qualified welder is allowed by code to perform weld joints as long as the joint has a diameter greater than ____ inches.

Between a combustible surface and a single wall vent pipe is ____ inch is the minimum distance that must be maintained.

The flue gases are removed from the furnace due to the ____ created.

Systems where a thermopile is installed power must be generated for the main gas valve and ____.

A ____ appliance is referred to as a gas appliance that does not depend on the buildings air for operation.

A ____ is a pilot that is automatically ignited each time the main burner is ignited, and which is automatically extinguished at the end of the successful main flame establishment period.

The greater of the piping diameter it serves or three inches is the minimum drip or dirt pocket ____.

The following types of draft control devices are installed in gas fired appliances: Select all that apply (2/5)

____ metal plates must be installed to protect tubing and CCST flexible gas piping that is installed inside a wall.

On the ____ side of the meter is where the start point for the gas line sizing and installation for a low pressure natural gas line.

The utility company owns with of the following: Select all that apply (3/5)

On an unvented appliances two ____ is the flex connectors maximum length.

The operational purpose of a ____ installed on a gas appliance is to ignite the main burner.

Which fittings can be installed with steel pipe: Select all that apply (2/5)

A ____ vent is installed on a high efficiency furnace for venting.

____ can be used for the construction of vent connectors.

____ are installed in process piping system to control velocity and gas volume regulation.

More energy is required for ____ to travel through a piping system due to it being heavier than air.

For a low pressure residential installation ____ is the minimum rough in piping test pressure.

A BH vent installed on a high efficiency furnace for venting may be constructed of the following materials: Select all that apply (2/5)

___ inches squares is a rectangular vent pipes minimum area.

The ____ installed in a residential gas hot water heater never automatically extinguished once the main burner ignition is established.

The installer must verify that a good liner is in place, in the event a gas fireplace is to be installed to a ____ chimney.

If you notice a waving ____ flame heating the appliance thermocouple, the most probable cause is a draft on the flame.

When a vent is installed on a dwelling, it must extend at least ____ above the building’s roof.

How many feet must a installed vent extend above the roof of a dwelling?

After completing a pressure test and gas lines are about to be purged, vehicles must be a minimum of 10 ____ from the air intake and the building.

After completing a pressure test and gas lines are about to be purged, what is the minimum distance vehicles must be from the air intake and the building?

A ____ propane system’s regulator must be within 3 feet of an outside wall.

2 psig low pressure gas lines should be tested for 15 minutes that are ____ or less in length.

How many feet from an outside wall must the system regulator of a 2 psi propane system be within?

In a piping system the density of the gas utilized in a system has a significant impact on ____ loss via the piping system.

To prevent a dwelling from filling up with gas, many gas appliances today are built with a ____, which is a safety measure to turn the gas off if the pilot flame goes out.

An electrically-activated vent damper will open when the appliance ____ valve opens.

The minimum height for a newly installed appliance vent, measured from the flue collar to where the vent ends outside, is 5____.

What is the minimum height for a newly installed appliance vent? (Measured from the flue collar to where the vent ends outside)

A union or a combination of fittings designed and intended to act as a ____ joint shall not be used where piping is concealed.

The key difference between a ____ system and a 100 percent shut-off system is that in the 100 percent shut-off system, if there is no flame, the gas supply to the pilot and the main valve will be cut off.

After completing a pressure test and ready to purge the gas lines, the purge point must be at minimum of ____ away from a building or air intake.

When a gas appliance is turned on, the release of gas that occurs until an updraft is formed is referred to as ____.

On a pressure control device the ____ installed must be no smaller than 1/4 inch in diameter.

The ____ point of brazing alloys must be at least 1000 degrees Fahrenheit.

The longest length of ____ gauge cable millivolt that can be installed in an installation is 24 feet.

Which of the following does not describes manifold pressure? Select all that apply (4/5)

What is manifold pressure?

When low pressure occurs on a regulator, and it has a low pressure trip, the regulator will have to be manually reset in order for ____ to flow.

When low pressure occurs on a regulator, and it has a low pressure trip, the regulator will have to ____ in order for gas to flow.

Any debris or dust particles will be burned off by the ____ pilot installed in gas appliances prior to mixing with the gas.

The maximum allowable ____ for a hose in a permanent gas installation is three meters.

For a permanent gas installation, what is the maximum length of hose allowed?

Which of the following are pilot designs installed in gas appliances ? Select all that apply (4/5)

Unless a natural gas threaded pipe is schedule 80 it must not be smaller than 1/2 inch ____.

A ____ heater should not be installed in a masonry fireplace with a permanently open flue.

Residential gas lines are buried at a minimum depth of ____ inches.

On a low pressure propane gas line, the starting point for size and installation will be on the meter’s ____.

Motive power is the suction caused by combustion products rising up via a ____.

An appliance with an input of more than ____ MBH, the venting shall not terminate within 3 feet of a window that can be opened and closed.

For a gas installation the ____ test gauges maximum range is required to be at least 15% greater than the required test pressure.

For a ____, conventional malleable fitting installed in a saturated steam system, the maximum pressure allowed is 150 psi.

The gas line to an appliance ____ may be purged if the unit is less than 400 MBH.

The best use for ____ piping is installation of underground water main lines.

Type K copper piping can be described as follows. Select all that apply (4/5)

The ____ used in a regulator can has the orifice opening size stamped on it.

When the water in a hot water tank reaches the optimum temperature, the energy cut off will cause the ____ to close.

If a hot water tanks contents reach optimum temperature, what will cause the gas valve to shut off?

On a residential dwelling the installed vent is required to extend at least two feet above any section of the building within ____ feet.

A thermopile, also known as a ____, is made up of numerous thermocouples connected in series.

For the first 10 feet downstream of a ____ vaporizer, plastic piping cannot be installed.

For the first 10 feet downstream of a propane vaporizer, ____ piping cannot be installed.

Mechanical compression joints used to transition ____ to steel in underground gas pipes must be at least 15 feet away from any building.

When transitioning from plastic to steel in underground gas pipes, the mechanical compression joints must be a minimum of ____ feet from any building.

Where the gas line crosses a ____, commercial gas line installations require a minimum of 24 inches of cover.

How many inches of cover are required when a commercial gas line crosses a driveway?

In which of the following locations can a draft vent hood not be installed: Select all that apply (3/5)

While sizing a gas line, which of the following factors are of primary importance? Select all that apply (3/5)

The specific gravity of ____ vapor is 1.50

Who of the following are not responsible for adjusting a service regulator? Select all that apply (4/5)

Which of the following type of tubings are approved for above ground installation? Select all that apply (3/5)

____ disconnect fittings are used to provide fast and easy connection and disconnection of fluid lines.

Using a test adaptor to verify the ____ voltage, a voltage measurement of 8 to 17 mV is normal.

What would be the expected voltage reading on a thermocouple using a test adapter?

An undersized regulator may cause ____ to form on the regulators outer body and head.

When sizing a chimney that serves more than one appliance, take the area of the largest flue plus ____ of the sum of all other flues.

Depending on the sort of area in which the pipeline operates, the pressure of gas in each segment of line normally ranges from ____ pounds to 1,500 pounds per square inch.

Within twenty four ____ of the outlet meter, gas lines for additional appliances must be installed

When the gas ____ in the building is higher than what the appliances demand, a system regulator will be installed to decrease the building supply pressure to the required appliance supply pressure.

When purging a gas line, a ____ with an associated handle must be installed no more than 5 feet from the purge point in the purge piping.

The customer would ____ as a result of a regulator freeze-up.

When a hot water system’s maximum temperature is achieved, a/an ____ opens.

The supply and return connectors on a ____ linear radial panel will be on the same end.

Spring rate would account for the majority of force on a pipe ____.

Offsets can be installed to accommodate pipe expansion on short runs of ____ heating piping.

Calgary’s specified exterior design temperature is ____.

Pipe guide spacing is crucial on a pipe run, with the second pipe guide set no more than 14 pipe diameters from the ____ joint.

The amount of pressure used for pressure testing a ____ will be set by the manufacturer’s instructions.

The condensing boiler, which often includes the installation of an extra heat exchanger, is categorized as a high-efficiency boiler with an efficiency of ____ or higher.

If a boiler is fired up with high water pressure, the ____ valve may blow.

The supply lines that supply a correctly installed vertical unit ____ will be installed with a pitch down from the unit.

A ____ pitch from the unit will be the direction of the lines installed feeding a vertical unit heater.

Which of the following could prevent freeze up if a hydronic unit heater is installed at a residential site in an attached garage? Select all that apply (3/5)

When choosing the right ____ expansion joint, make sure the axial movement is at least equivalent to the maximum pipe movement.

Auxiliary systems are addressed in ____ of the heating code.

If a section of a ____ system travels through a freezing zone, the installation of a wild loop may be required to provide continuous flow between the supply and return pipes.

Which of the following determine the output of a finned baseboard heater? Select all that apply (2/5)

On long run hydronic piping systems, the following methods can be used to facilitate expansion. Select all that apply (3/5)

Because ____ radiators and convectors release heat at different rates, they should not be piped in the same heating zone.

Piping installations that connect ____ that operate at different pressures to one common header may result in operational issues such as experiencing backflow.

The condensing boiler, which commonly incorporates an extra heat exchanger, is categorized as a high-efficiency boiler with an efficiency of ____ or higher.