Heat exchanger Study guides, Class notes & Summaries
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BECC Mod 6 Questions with 100% Correct Answers | Latest Version 2024 | Expert Verified | Ace the Test
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Which pump uses a high velocity jet of seawater to lower the pressure in the chamber around the 
converging nozzle? Jet 
(TRUE/FALSE) A fixed volume of fluid is discharged by an eductor regardless of head pressure. 
False 
Which type of heat exchanger has one or more coils of tubing installed inside a shell? 
Helical tube 
Which type of heat exchanger uses one fluid flow at right angles (90°) with the other fluid? 
Cross flow type 
The gear that is widely used in the main reduction gear C 
The ...
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InterNACHI questions with correct answers
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b. end 1 inch above the waste drain line CORRECT ANSWER A condensate line should ______________. 
a. empty directly into the waste drain line 
b. end 1 inch above the waste drain line 
c. not drain into the waste drain line 
d. extend at least 1 inch into the waste drain line 
 
c. is more efficient than conventional furnaces and uses a secondary heat exchanger CORRECT ANSWER A condensing furnace _____________. 
a. works like an air conditioner, except that it heats instead of cools 
b. is a...
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HVAC Gas Heat Exam (Latest 2024/ 2025 Update) 100% Correct Questions and Verified Answers| Grade A
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HVAC Gas Heat Exam (Latest 2024/ 2025 Update) 100% Correct Questions and Verified Answers| Grade A 
 
Q: Why is specific gravity of a gas important? 
 
 
Answer: 
It affects the gas flow through the piping and through the orifice of the furnace. 
 
 
 
Q: What is an orifice and a spud? 
 
 
Answer: 
An orifice is a precisely sized hole in a gas fitting which gas flows from the manifold to the burners. 
A spud is another name for a gas fitting. 
 
 
 
Q: If both a light gas and a heavy gas are at...
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The Heating and Cooling Inspection: AHIT Questions with complete solutions
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When inspecting the heating equipment, the inspector is not required to _________. 
 
A. operate the system using normal operating controls 
B. open readily openable access panels provided by the manufacturer 
C. observe automatic safety controls 
D. operate heating systems when conditions may cause equipment damage CORRECT ANSWER D. operate heating systems when conditions may cause equipment damage 
 
What should an inspector do if they find a cracked heat exchanger? 
 
A. turn off the furnace ...
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ABSA 4b Exam Latest Version. 100% Complete and Verified Correct
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ABSA 4b Exam Latest Version. 
Warm Air Heating System Equipment 
 
 
In a warm air heating system the cold air return registers 
are located 
a) in exterior walls 
b) in interior locations 
c) under windows 
d) in floors 
e) in ceilings 
B 
 
 
The major disadvantage of an electric resistance coil furnace 
for warm air heating is 
a) the high cost of electricity 
b) the danger from electric shock 
c) the high cost of maintenance 
d) the large size of the furnace 
e) the location of electrical wi...
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ABSA 4b Exam Latest Version Complete With A+ Graded Answers
- Exam (elaborations) • 132 pages • 2024
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ABSA 4b Exam Latest Version. 
Warm Air Heating System Equipment 
 
 
In a warm air heating system the cold air return registers 
are located 
a) in exterior walls 
b) in interior locations 
c) under windows 
d) in floors 
e) in ceilings 
B 
 
 
The major disadvantage of an electric resistance coil furnace 
for warm air heating is 
a) the high cost of electricity 
b) the danger from electric shock 
c) the high cost of maintenance 
d) the large size of the furnace 
e) the location of electrical wi...
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HVAC Test 1 Latest Update Graded A+
- Exam (elaborations) • 10 pages • 2024
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HVAC Test 1 Latest Update Graded A+ 
 
Absorption A refrigeration cycle where input energy is heat 
 
Adiabatic without gain or loss of heat 
 
Air Conditioning controlling air temperature humidity and quality 
 
Air Cooled Condenser a heat exchanger that transfers building heat to outdoor air 
 
Air Handler air moving equipment that can change air temperature humidity and quality 
 
BTU British thermal unit. 1 BTU will increase the temperature of 1 lb of water 1 degree F 
 
BTUH Rate of heat fl...
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NATE Gas Heating Exam with Complete Solutions 100% Verified Graded A+
- Exam (elaborations) • 20 pages • 2023
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NATE Gas Heating Exam with Complete Solutions 100% Verified Graded 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 - Correct 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 - Correct Answer a (Gravity) 
 
Furnace heat exchangers generally are made of ______. ...
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PSI National Home Inspector Practice Exam 2024 Questions and Answers Already Graded A+.
- Exam (elaborations) • 21 pages • 2024
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PSI National Home Inspector Practice Exam 2024 Questions and Answers Already Graded A+. 
1. Which of the following describes partial vapor pressure? 
A) Water vapor has a tendency to disperse itself equally in the available air. 
B) Water vapor causes new homes to require house wrap. 
C) Water vapor is common with forced induction natural gas furnaces. 
D) Water vapor is an indication of sick house syndrome.: correct answer- A) 
Water vapor has a tendency to disperse itself equally in the availa...
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G2 Gas Technician Module 19 Revised Questions Rated A
- Exam (elaborations) • 14 pages • 2024
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G2 Gas Technician Module 19 Revised Questions Rated A 
If the venting on a high efficiency furnace runs through unheated spaces, what must be done? Insulate piping to prevent Condensation and freezing 
What is condensate drain piping used for? Dispose Liquid waste 
Once the furnace is installed, what are the gas technician's responsibilities to the user? To instruct the the user in the safe and correct operation of all appliances and equipment - clause 4.3.2 
Which furnace type is the most popu...