InterNachi HVAC Material |
Questions and Correct
Answers | Latest Update
2024/2025 | 100% PASS
A heat source capable of maintaining at least __________ should serve
every habitable space in houses in almost all regions. - Answer -68F
Burning natural gas creates _______________. - Answer -Water vapor
and carbon dioxide
Burning natural gas with Oxygen yields CO2, water vapor and _______. -
Answer -Heat
As hot gases cool, they release a lot of heat energy as the change their
state from __________. - Answer -Gas to a liquid
If combustion air is inadequately supplied to a gas furnace,
___________ will be produced. - Answer -Carbon Monoxide
* You must add enough O2 to the Reaction to get CO2 in its products.
____________ is what carries the heat from the source to the enclosure
being heated - Answer -Heat conveying medium
, You may be able to describe a heating system by its _________. -
Answer -Heat conveying medium
_________________ and baseboard convectors are considered heat-
emitting components. - Answer -Radiators
List the two categories to describe furnace heating systems: - Answer -
1. Gravity Warm Air Furnaces
2. Forced Warm Air Furnaces
A warm-air heating system costs ________ to install than a hot-water or
steam-heating system. - Answer -Less
A hot-water or steam-heating system costs _________ than a warm-air
heating system. - Answer -More
Steady-state efficiency measures how efficiently a furnace
______________. - Answer -Converts fuel to heat
* How much usable heat is created when a furnace is running*
The efficiency of the air circulation in a house with gravity warm-air
heating system depends on ______________. - Answer -The
temperature difference between
1. The warm air rising
2. The cool air falling
The heat from a warm-air heating system is distributed throughout the
home either by gravity or ______________. - Answer -The use of a
circulating/blower fan
Questions and Correct
Answers | Latest Update
2024/2025 | 100% PASS
A heat source capable of maintaining at least __________ should serve
every habitable space in houses in almost all regions. - Answer -68F
Burning natural gas creates _______________. - Answer -Water vapor
and carbon dioxide
Burning natural gas with Oxygen yields CO2, water vapor and _______. -
Answer -Heat
As hot gases cool, they release a lot of heat energy as the change their
state from __________. - Answer -Gas to a liquid
If combustion air is inadequately supplied to a gas furnace,
___________ will be produced. - Answer -Carbon Monoxide
* You must add enough O2 to the Reaction to get CO2 in its products.
____________ is what carries the heat from the source to the enclosure
being heated - Answer -Heat conveying medium
, You may be able to describe a heating system by its _________. -
Answer -Heat conveying medium
_________________ and baseboard convectors are considered heat-
emitting components. - Answer -Radiators
List the two categories to describe furnace heating systems: - Answer -
1. Gravity Warm Air Furnaces
2. Forced Warm Air Furnaces
A warm-air heating system costs ________ to install than a hot-water or
steam-heating system. - Answer -Less
A hot-water or steam-heating system costs _________ than a warm-air
heating system. - Answer -More
Steady-state efficiency measures how efficiently a furnace
______________. - Answer -Converts fuel to heat
* How much usable heat is created when a furnace is running*
The efficiency of the air circulation in a house with gravity warm-air
heating system depends on ______________. - Answer -The
temperature difference between
1. The warm air rising
2. The cool air falling
The heat from a warm-air heating system is distributed throughout the
home either by gravity or ______________. - Answer -The use of a
circulating/blower fan
