Fuel and gas chapter 5 and 6

Screens with mesh used to protect indoor and outdoor openings from debris and vermin must have openings of a maximum of ____"

1/4

The bottom of the vent terminal and the air intake of a direct vent appliance should be located, at least____' above grade

12

NFPA 54 contains____ sizing tables to determine the correct size of category 1 oh fuel, gas appliance vent systems.

15

The safety valve and safety relief valve used for low pressure. Steam boilers, operate in the same manner and are set to open when the MWAP exceeds____psi and closes when the pressure in the boiler drops to 12 psi (82.7 KPA)

15

In a water heater, a temperature relief valve is set to activate when the water temperature within the tank exceeds___ Fahrenheit

210

According to NFPA 211 an exterior chimney, can be used for a water heater if the outdoor design temperature is not less than___ Fahrenheit

5

Type B and type L gas vent should terminate at least___' in vertical height above an appliance, draft hood, outlet or flu collar.

5

Per NFPA 54___ refers to the volume of air in a room that is changed or replace once per hour.

ACH

A(n)___is a device that is intended for installation in the venting system, in the outlet of or downstream of the appliance draft hood of an individual automatically operated appliance and is designed to automatically open the venting system when the appliance is in operation and to automatically close off the venting system when the appliance is in standby or shut down condition.

Automatic vent damper device

A type___ gas vent configuration reduces the heat loss from vent gases and much the same way that an insulated thermos works to keep liquids warm.

B

A__ provides a clean out to remove debris from a chimney and should always be accessible

Base tee

A(n)___ on a furnace can be either a centrifugal or positive displacement fan

Blower

____ are utilized for water, heating, hydronic, and steam heating systems.

Boilers

_____ are classified as to how they are manufactured, either package or field-erected.

Boilers

A(n)__ forced -air gas heating system is a heating system that uses a centrally located gas heating unit to produce heat for a building.

Central

A(n)__ relief valve is an automatic, self closing safety valve installed, and an opening of a hot water tank or other hot water storage tank, that releases water, and steam in a controlled manner.

Combination temperature and pressure (t&p)

A(n)____ system is a vent system that uses separate piping for combustion air in the products of combustion.

Direct vent

The standard method of determining indoor combustion of air can only be used if a building or room has a verified ACH rating.

False

True or false A vent connector should be as long as practical, in the flue gas appliance should be located as far as possible from the chimney or vent.

False

True or false ABS plastic pipe that is used to vent direct vent and mechanical draft systems has the lowest plastic pipe temperature rating at 140 Fahrenheit (60 Celsius)

False

True or false High pressure water boilers are most commonly used boilers for water heating and hydronic heating systems.

False

True or false Metal chimneys can be used for all appliances that can be vented using chimneys.

False

True or false The AFUE for most, furnaces is typically between 50% and 75%

False

True or false The final step in the process of supplying combustion and venting air to a fuel gas appliance is to determine if the required volume of indoor air at the appliance location is available for combustion air without compromising the building envelope

False

True or false Type B gas vent can be use for venting in place of type L gas vents, but not ViceVersa.

False

A___is the valve and associated control that admit the correct amount of feedwater to the boiler to maintain the NOWL under varying steam loads

Feedwater regulator

In most cases,A(n)___ is installed on a boiler as a combination component with the low-water cutoff, or it may be controlled by a signal from a low water cut off

Feedwater regulator

A(n)____LWCO is a low-water cutoff that uses a float as a buoyancy device that raises or falls with level of water in the boiler.

Float type

Thermostats for controlling___ should not be installed on cold, exposed walls.

Gas unit heaters

A___ infrared heater uses the impingement of hot gases of combustion or flame on an open finned ceramic refractory surface to produce high intensity radiant heat.

High intensity direct-fired refractory

A pressure control is located at the___of the steam side of the boiler.

Highest part

An ___forced -air gas furnace is essentially a forced-air furnace improved by addition of an induced-draft fan for positive venting and control of combustion air.

Intermediate efficiency

The___ Method of determining the required volume of combustion of air, requires a calculation of a the required air volume based on two appliance types, fan assisted and other than fan assisted.

KAIR

Two types of___ draft Systems, force craft and induced draft can create positive pressure in the vent system in a category 11-1V appliance.

Mechanical

Air filters should be checked, replaced, or cleaned on a(n)___ basis, one more frequently.

Monthly

___ is the vertical distance from the appliance draft hood or flue collar connection to the level, at which it joins the common vent.

N\A Need answer. Connector rise?

A(n)__ system consists of mechanical refrigeration unit, similar to a room, air conditioning, appliance, that requires electricity as a source of energy, and a separate gas fired heating unit.

Rooftop combination heating/cooling

A____boiler is a boiler with MAWP of more than 15 psi (103.4kpa) but not more than 100 psi (689.5 KPA) and having a heat input less than 440,000 BTU/hr

Small power

A(n)____ is a metal lining for an opening in a roof or wall, through which a vent or chimney passes.

Thimble

True or false A forced air gas furnace is a self-contained. Heating appliance that utilizes fuel gas for combustion to transfer heat from metal to air by a fan or blower and includes at least one burner, a heat exchanger, and a number of system control devices.

True

True or false A slotted port burner is similar to the port burner except it has sawed or grooved slots instead of round ports that produce a wider flame.

True

True or false According to NFPA 54, if available room space does not provide enough required volume of air to provide for complete combustion air volume yeah, there is no possibility of the ear from other indoor spaces, all of the required volume of combustion air can be obtained from outdoors.

True

True or false All fuel, gas appliances require an adequate supply of combustion air.

True

True or false All gas vents type B, type B-w and type L should terminate above the roof surface with a list of cap or listed Roof assembly.

True

True or false Chimney inspection should be made prior to the connection of new appliance to a chimney that previously served appliances using fuels other than fuel gas .

True

True or false Fuel gas is ignited in the main burner at the bottom of a water heater, storage tank, and combustion gases flow through a flue inside the tank to heat the water

True

True or false Seasonal efficiency is the percentage of the total fuel consumed over the heating season, delivered to the building as useful heat.

True

True or false Single-wall metal pipe can only be used for vents that run directly from the space in which the appliance is located to its termination through the roof or exterior wall

True

True or false The best locations for a double acting, biometric damper on a gas, fired equipment, are where the flue gases are not directed toward the gate of the draft control during normal updraft conditions, but are so directed during a downdraft condition.

True

True or false The combustion air openings used to connect. Indoor spaces are not required to be totally within the upper or lower 12 inches (30.5 cm) of the room, but some portion of combustion air openings must be within 12 inches (30.5 cm) of the floor or ceiling.

True

True or false The first requirement of category 1 natural draft, venting systems is to remove all products of combustion from the building.

True

True or false The primary advantage of a gravity, warm air system is that electrical power is not required for a fan or a blower.

True

True or false The probe-type LWCO is a low-water cutoff that utilizes an electrode probe inserted directly into the boiler to monitor. It's water level.

True

True or false A fire tube boiler is a boiler that utilizes fire tubes containing the hot gases of combustion to heat the HTF that surround the tubes.

True

For vent systems with more than___90 degree elbows, the capacity of the vent must be reduced

Two

The purpose of a fuel gas appliance is to__.

Utilize the combustion of fuel gas to produce heat.

A(n)___ is the pipe or duct that connects a fuel gas burning appliance, to a vent or a chimney.

Vent connector

A____system is a system of components that maintains a desired temperature in building living or working spaces by utilizing the combustion of fuel gas to transfer heat from metal to air

Warm air gas heating

The____boiler is able to handle rapid load changes since it contains less water and has higher percentage of radiant heating surfaces.

Water tube

A___is the section of a building that is controlled by on HVAC controlling device, such as a thermostat.

Zone