NATE GAS HEATING LATEST EXAM 2024 (A NEW
UPDATED VERSION) ALL 50 REAL QUESTIONS AND
CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) |
GUARANTEED PASS A+
In a modern gas furnace, the component that separates the combustion gases from
the supply air is the ______.
a. gas valve
b. heat exchanger
c. inducer fan
d. plenum box - ANSWER: b (heat exchanger)
What type of furnace moves warm air through the conditioned space without a fan?
a. Gravity
b. Horizontal
c. Lowboy
d. Upflow - ANSWER: a (Gravity)
Furnace heat exchangers generally are made of ______.
a. ceramic
b. copper
c. plastic
d. steel - ANSWER: d (steel)
What does AFUE stand for?
a. Actual Fuel Usage Efficiency
b. Annual Fuel Utilization Efficiency
c. Annual Furnace Usage Equivalency
d. Approved Fuel Usage Estimate - ANSWER: b (Annual Fuel Utilization Efficiency)
The main purpose of a secondary heat exchanger is to ______.
a. evaporate the flue gases
b. provide a backup containment
c. remove additional heat from the flue gases
d. reverse the primary air flow - ANSWER: c (remove additional heat from the flue
gases)
Which gas commonly used as a fuel in gas furnaces is heavier than air?
a. butane
b. isobutene
c. methane
d. propane - ANSWER: d (propane)
Which grade of fuel oil is most commonly used in residential furnaces?
a. 1
, b. 2
c. 3
d. 4 - ANSWER: b (2)
How many cubic feet of air are needed to burn 1 ft3 of natural gas?
a. 6 ft.3
b. 10 ft.3
c. 18 ft.3
d. 24 ft.3 - ANSWER: b (10 ft.3)
How many cubic feet of air are needed to burn 1 ft.3 of propane?
a. 6 ft.3
b. 10 ft.3
c. 18 ft.3
d. 24 ft.3 - ANSWER: d (24 ft.3)
What is the average heat content of 1 ft.3 of natural gas?
a. 500 Btu
b. 800 Btu
c. 1,050 Btu
d. 2,500 Btu - ANSWER: c (1,050 Btu)
What is the average heat content of 1 ft.3 of propane?
a. 500 Btu
b. 800 Btu
c. 1,050 Btu
d. 2,500 Btu - ANSWER: d (2,500 Btu)
What is the average heat content of one gallon of No. 2 fuel oil?
a. 80,000 Btu
b. 110,000 Btu
c. 140,000 Btu
d. 170,000 Btu - ANSWER: c (140,000 Btu)
What is a typical manifold pressure for a natural gas furnace?
a. 3.5 in. w.g.
b. 11 in. w.g.
c. 2 psi
d. 5 psi - ANSWER: a (3.5 in. w.g.)
What is a typical manifold pressure for a propane furnace?
a. 3.5 in. w.g.
b. 11 in. w.g.
c. 2 psi
d. 5 psi - ANSWER: b (11 in. w.g.)
What type of furnace is commonly installed in a closet with underfloor supply ducts?
UPDATED VERSION) ALL 50 REAL QUESTIONS AND
CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) |
GUARANTEED PASS A+
In a modern gas furnace, the component that separates the combustion gases from
the supply air is the ______.
a. gas valve
b. heat exchanger
c. inducer fan
d. plenum box - ANSWER: b (heat exchanger)
What type of furnace moves warm air through the conditioned space without a fan?
a. Gravity
b. Horizontal
c. Lowboy
d. Upflow - ANSWER: a (Gravity)
Furnace heat exchangers generally are made of ______.
a. ceramic
b. copper
c. plastic
d. steel - ANSWER: d (steel)
What does AFUE stand for?
a. Actual Fuel Usage Efficiency
b. Annual Fuel Utilization Efficiency
c. Annual Furnace Usage Equivalency
d. Approved Fuel Usage Estimate - ANSWER: b (Annual Fuel Utilization Efficiency)
The main purpose of a secondary heat exchanger is to ______.
a. evaporate the flue gases
b. provide a backup containment
c. remove additional heat from the flue gases
d. reverse the primary air flow - ANSWER: c (remove additional heat from the flue
gases)
Which gas commonly used as a fuel in gas furnaces is heavier than air?
a. butane
b. isobutene
c. methane
d. propane - ANSWER: d (propane)
Which grade of fuel oil is most commonly used in residential furnaces?
a. 1
, b. 2
c. 3
d. 4 - ANSWER: b (2)
How many cubic feet of air are needed to burn 1 ft3 of natural gas?
a. 6 ft.3
b. 10 ft.3
c. 18 ft.3
d. 24 ft.3 - ANSWER: b (10 ft.3)
How many cubic feet of air are needed to burn 1 ft.3 of propane?
a. 6 ft.3
b. 10 ft.3
c. 18 ft.3
d. 24 ft.3 - ANSWER: d (24 ft.3)
What is the average heat content of 1 ft.3 of natural gas?
a. 500 Btu
b. 800 Btu
c. 1,050 Btu
d. 2,500 Btu - ANSWER: c (1,050 Btu)
What is the average heat content of 1 ft.3 of propane?
a. 500 Btu
b. 800 Btu
c. 1,050 Btu
d. 2,500 Btu - ANSWER: d (2,500 Btu)
What is the average heat content of one gallon of No. 2 fuel oil?
a. 80,000 Btu
b. 110,000 Btu
c. 140,000 Btu
d. 170,000 Btu - ANSWER: c (140,000 Btu)
What is a typical manifold pressure for a natural gas furnace?
a. 3.5 in. w.g.
b. 11 in. w.g.
c. 2 psi
d. 5 psi - ANSWER: a (3.5 in. w.g.)
What is a typical manifold pressure for a propane furnace?
a. 3.5 in. w.g.
b. 11 in. w.g.
c. 2 psi
d. 5 psi - ANSWER: b (11 in. w.g.)
What type of furnace is commonly installed in a closet with underfloor supply ducts?
