airserv.htm

CORE (30)
COMMUNICATIONS FOR HVAC TECHNICIANS (8)
Writing For Technicians
Reading & English Comprehension
Grammar, Punctuation & Spelling In Writing
Report Writing
Oral Communications

MATHEMATICS (10)
Arithmetic
Algebra
Geometry
Use Of Computers
Tools & Scales - Basic Math Measurement
Graphs, Charts & Tables
Problem Solving - Non Customer

BASIC SCIENCE (12)
Chemistry Basics
Physical Measurements - Temperature & Heat
Physical Measurements - Pressure Mechanics

INTERPERSONAL RELATIONS (20)
PERSONAL ETHICS & CONDUCT (10)
Personal Characteristics
Behavior Habits In The Workplace

INTERPERSONAL RELATIONS (10)
Responding To Customer Needs
Handling Customer Complaints
The Technician's Role In Sales Technician's Role As Customer Educator

TOOLS & MEASUREMENTS (40)
FABRICATION TOOLS (6)
Hand Tools
Duct Fabrication Equipment

AIRFLOW MEASUREMENTS (21)
Airflow Velocity Measurements
Pressure Measurements
Air Volume Measurements
Airflow Checks

ELECTRICAL (30)
BASIC ELECTRICITY (10)
Electrons In Electricity
Electrical Basic Terms
Power
Magnetism
Electrical Loads
AC Circuits
DC Circuits
Intro To Basic Circuit Analysis
Electricity-Generation And Distribution
Solid State Electronics

AC MOTORS (9)
Single Phase Motors Construction
Single Phase Motors
Three Phase Motors
Damper Motors
Constant Airflow Motors

ELECTRICAL DIAGRAMS (5)
Symbols
Field Wiring Diagrams
Pictorial Diagrams
Schematic (Ladder) Diagrams

BASIC SYSTEMS & COMPONENTS (40)
INTRO TO BASIC SYSTEMS & COMPONENTS (2)
Heat Transfer And The Basic Cooling Cycle

DUCT SYSTEMS (17)
Basic Duct Systems
Duct Location
Basic Zone Systems
Duct Materials
Fitting Nomenclature
Grilles
Registers
Diffusers
Filtration Systems
Ventilation Systems
Dampers
Humidifiers

INSTALLATION PROCEDURES (30)
DUCT FABRICATION (10)
Fabrication Techniques For Metal Duct
Fabrication Techniques For Ductboard

DUCT INSTALLATION (20)
Field Construction / Installation
Installing Metal Duct
Installing Flexible Duct
Installing Ductboard
Installing Grilles, Registers, Diffusers, & Damper
Chases Used As Ducts
Reconnecting Duct When Replacing Equipment

SERVICE & REPAIR PROCEDURES (40)
PREVENTIVE MAINTENANCE (1)
Mechanical Preventive Maintenance

BASIC HVAC SYSTEM ANALYSIS (14)
Noise Problems
High Utility Bills
Wide Temperature Swings
Single Area Is Hot Or Cold
Indoor Air Quality

ANALYZING REPORTED SYMPTOMS IN COOLING (7)
Poor Cooling
Humidity Problems
Drafty

ANALYZING REPORTED SYMPTOMS IN HEATING (6)
Poor Heating
Humidity Problems
Drafty

AIR BALANCING (12)
Gathering Design Information
Preparation Of System For Air Tests
Procedures For Conducting Air Tests
Making Adjustments
Final Test
Completion Of Appropriate Forms

CONTROLS (20)
ELECTROMECHANICAL SENSING CONTROLS (7)
Electromechanical Wall Thermostat
Electromechanical Temperature Controls
Pressure Controls
Electromechanical Outdoor Thermostats

ELECTRONIC CONTROLS (10)
Overview Of Electronic Controllers
Electronic Thermostats
Zone Controls
Electronic Compressor Controls
Electronic Timers
Economizer Controllers

REGULATIONS, CODES, & SAFETY (20)
HANDLING HAZARDOUS MATERIALS (2)
Federal Regulations
State Regulations For Hazardous Materials

SAFETY (10)
Hazmat Training
Safe Handling Of Refrigerant Containers
Personal Safety & Work Practices
Brazing & Soldering Safe Practices
Electrical Safety
Personal Safety Around Moving Machinery

DESIGN (30)
BIDS & PROPOSALS (3)
System Sizing
Preparation For Air Distribution Proposal

DESIGN CONSIDERATIONS - TOTAL COMFORT (8)
Temperature
Humidity
Indoor Air Quality
Sound Level
Zoning

DESIGN CONSIDERATIONS - LIGHT COMMERCIAL (7)
Split Systems
Packaged Systems
Air Balancing

DESIGN CONSIDERATIONS - COMPONENTS (7)
Diffusers
Grilles
Registers
Ducts & Fittings
Special Ducts & Fittings
Static Pressure Losses In Filtration Systems
Blueprint Reading

CORE
1. In the following sentence, which of the choices below would best simplify and still express the meaning of the underlined words?
In my opinion, the new thermostat design is a change for the better.

a. an improvement
b. a step in the right direction
c. a help
d. a badly needed modification

2. If you bought 6 cases of duct tape for $64.14, what was the price of each case?

a. always agrees with everything said by another person.
b. sticks by their friends no matter what they do.
c. keeps to a course of action no matter how difficult.
d. always disagrees with what is said by another person.

6. Carefully choosing questions that will give you a customer's true feelings is:

a. a technique to be avoided when asking questions of a customer who has a complaint.
b. a primary technique used when asking questions of a customer who has a complaint.
c. less important than asking as many questions as possible of a customer who has a complaint.
d. a technique used only when asking questions of satisfied customers.

TOOLS & MEASUREMENTS
7. To reduce the end diameter of a section of round duct a technician would typically use a:

8. An electrical meter that displays volts, ohms or milliamperes on a analog scale is called an:

a. analog continuity tester.
b. analog megohmmeter.
c. analog voltmeter.
d. analog VOM.

a. volume of air through a duct section in a given amount of time.
b. velocity of air through a duct section.
c. pressure that is exerted equally on all interior walls of a duct section.
d. maximum speed at which air can travel through a duct section without generating static electricity.

10. To measure the difference in air pressure between two locations in a duct system, a technician would use a:

a. diaphragm type pressure differential pressure gauge.
b. digital anemometer.
c. inclined manometer with one end open to the atmosphere.
d. digital velometer.

11. To calculate the cfm of airflow in a section of ductwork you would need the:

a. static pressure and duct length.
b. duct cross section and length.
c. duct cross section and air velocity.
d. duct length and air velocity.

12. Which of the following thermometers would you typically use to obtain a temperature measurement of an inaccessible area?

a. a pocket test thermometer
b. an infrared thermometer
c. a surface probe thermometer
d. a pressure probe thermometer

a. removing one of the three leads at the terminal connections to a three phase motor
b. reversing the power connections to a 220V single phase motor
c. reversing the terminal connections to the run capacitor of a 220V single phase motor
d. reversing two of the three leads at the terminal connections to a three phase motor

15. Using the diagram above, what designation is given to the dual capacitor used for the compressor and fan motor?

16. A pack aged cooling system has a 240V blower motor with an open internal overload device. Which of the following VOM readings would typically indicate this condition?

a. 244V measured across the motor with a normal amp draw
b. 120V measured across the motor with a high amperage draw
c. 0 volts measured across the motor and a 0 amperage draw
d. 240V measured across the motor with a 0 amperage draw

BASIC SYSTEMS & COMPONENTS
17. Customer complaints of "cold air blowing" from the registers of a properly charged heat pump system are typically reduced if:

a. air ducts and supply registers are slightly undersized to increase the air velocity.
b. air ducts and supply registers are properly sized to maintain the correct velocity.
c. only floor registers are used in a residence.
d. only sidewall air registers are used in a residence.

a. inducer blower.
b. standing pilot.
c. heat exchanger.
d. electronic flame prover.

a. indoor supply blowers.
b. outdoor condenser fan assemblies.
c. indoor ceiling fans.
d. gabled roof exhaust blowers.

20. A perimeter loop supply duct system using floor or low sidewall outlets is preferred in which of the following types of residential construction?

a. pier and beam construction in a warm weather climate using a closet installed upflow gas furnace
b. pier and beam construction in a cold weather climate using a closet installed upflow gas furnace
c. slab construction in a cold weather climate using a closet-installed counterflow gas furnace
d. slab construction in a warm weather climate using a attic mounted horizontal gas furnace

21. Which of the following adds significantly to the pressure drop of a duct system?

22. Proper control of temperature, humidity, air movement, air cleanliness, and fresh air ventilation is necessary:

a. to achieve a total comfort level in residential HVAC applications only.
b. to achieve a total comfort level in commercial HVAC applications only.
c. to achieve a total comfort level in any structure.
d. to achieve a total comfort level in Southern states only.

INSTALLATION PROCEDURES
23. Large metal duct that is suspended should be supported using:

a. plumber's strap screwed to the side wall.
b. metal strap formed into a saddle.
c. cloth strap formed into a saddle.
d. U channel and rods.

24. Which of the following connections should typically be done using sheet metal screws only?

a. attaching plenums to coils
b. attaching start collars to plenums
c. connecting sections of rectangular metal duct
d. mounting diffusers to boots

25. After connecting two sections of metal ductwork using drive cleats, you should:

a. bend the ends of the drives over the duct.
b. bend the ends of the drives away from the duct.
c. cut the ends of the drives off.
d. crimp the ends of the drives and cut off.

26. If it is necessary to convert a section of a flexible duct trunk line to rectangular metal duct, the connection point should be fitted with a:

a. flexible collar.
b. ductboard transition.
c. sheet metal transition.
d. plywood transition.

SERVICE & REPAIR PROCEDURES
27. Metal duct that has hung for several years must be checked for sags and misalignments because:

a. they can place excessive stress on joints and seals.
b. they increase static pressure in the duct.
c. they decrease static pressure in the duct.
d. they increase CFM at the diffusers.

28. A customer had a system installed over a year ago. In the past few months the system has slowly stopped cooling as well as it once did. Air volume to all rooms is very low. The problem is most likely a:

a. refrigerant circuit that is leaking.
b. bad fan blade.
c. clogged filter.
d. blower motor that is going bad.

a. overvoltage to motor
b. worn pulley
c. undervoltage to motor
d. wrong blower wheel

a. increased capacity of the system in cooling
b. poor dehumidification in cooling
c. compressor short cycling
d. wide temperature swings in the space

a. pre-ignition
b. cut out on high limit
c. flame roll out
d. condensation in the vent

a. the same total velocity of supply air to each space controlled by the system.
b. a proportional total velocity of supply air to each space controlled by the system.
c. the same quantity of supply air to each space controlled by the system.
d. a proportional quantity of supply air to each space controlled by the system.

33. The next test a technician would typically perform after adjusting dampers to a conditioned area of a residence would be to:

a. measure cfm and air velocity levels at supply air grilles.
b. measure cfm levels on all other ductwork connected to the same system.
c.leak check all duct joints.
d.check refrigerant pressures.

CONTROLS
34. To have a system automatically switch to heating or cooling as the load changes, the thermostat must have its:

a. system switch set in the cooling position.
b. system switch set in the heating position.
c. fan switch set in the auto position.
d. system switch set in the auto position.

35. A typical induced draft furnace uses a blower-off delay in the cooling mode to:

a. increase the efficiency of the system.
b. airwash the coil on shutdown.
c. minimize dehumidification at the coil.
d. prevent blowing moisture off the coil on shut off.

36. A thermistor is a component used in an electronic wall thermostat to measure:

REGULATIONS, CODES, & SAFETY
37. A technician's understanding of proper response procedures to accidents involving refrigerants is a requirement of:

a. all refrigerant manufacturers.
b. all HVAC equipment manufacturers.
c. the National Fire Protection Association.
d. the Federal government.

38. A duct system should be designed and balanced to deliver sufficient air to help maintain indoor air quality. Which of the following agencies has greater priorities on the quality of indoor air?

39. Which of the following areas of metal air duct design is often governed by municipal codes?

a. size of air ducts
b. number of duct fittings
c. thickness of duct insulation
d. type of connections made at duct joints

a. wire sizing
b. use of return air sensors
c. location of service platforms
d. clearances around condensing units

41. Which of the following jobs most requires the wearing of safety glasses or goggles?

a.demonstrating programming on a thermostat
b. brazing copper tubing
c. changing the oil in a vacuum pump
d. cutting cap tube

42. The efficiency of a heat pump operating in the cooling mode is expressed in which of the following standards:

DESIGN
43. What legal condition exists after a verifiable verbal agreement on a bid is reached by both the customer and a contracting company?

a. the contracting company would have the legal right to change their bid within 7 days
b. a legal condition would not exist unless the attorneys for both parties signed an agreement
c. the contracting company could be legally liable for the bid
d. a legal condition would not exist until a written contract was signed by both parties

44. Humidity control is an important contributor to total comfort in a cooling system. A properly sized duct system is an important part of humidity control by:

a. ensuring the maximum amount of air is moving over the persons in the space.
b. ensuring the proper amount of air is moving over the evaporator.
c. maintaining a constant static pressure in the supply plenum.
d. maintaining a constant static pressure in the return plenum.

45. Which of the following conditions would typically require locating supply registers in the floors of both the upper and lower levels of a two story residence?

a. in predominately colder climates, when the furnace is located in the basement
b. in predominately colder climates, when the furnace is located in the attic
c. in predominately warmer climates, when the furnace is located in the basement
d. in predominately warmer climates, when the furnace is located in the attic

46. In which of the following installations would the supply and return ductwork need to be insulated and weatherproofed?

a. a curb mounted, packaged A/C unit supplying a totally enclosed interior duct system
b. a split system A/C unit supplying a totally enclosed interior duct system
c. a ground level packaged system requiring ductwork to be totally enclosed in a crawlspace.
d. a ground level packaged system requiring ductwork to run up an outside wall and into an attic.

47. When selecting grilles and diffusers, which of the following should a technician avoid to reduce noise problems?

a. undersizing supply air diffusers
b. oversizing supply air diffusers
c. oversizing return air grilles
d. using fixed vane diffusers

1 A	11 C	21 A	31 B	41 B
2 D	12 B	2 C	32 D	42 B
3 B	13 C	23 D	33 B	43 C
4 B	14 D	24 D	34 D	44 B
5 C	15 A	25 A	35 A	45 A
6 B	16 D	26 C	36 B	46 D
7 D	17 B	27 A	37 D	47 A
8 D	18 C	28 C	38 A
9 C	19 A	29 B	39 C
10 A	20 C	30 B	40 B

Exam Outline (number of questions in module/topic) Go to Sample Questions

Exam Outline (number of questions in module/topic)
Go to Sample Questions