Air-to-Air Heat Pump

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

TOOLS & MEASUREMENTS (30)
FABRICATION TOOLS (11)
Hand Tools
Brazing & Soldering Equipment
Refrigerant Tubing Tools
Leak Detection Tools
Duct Fabrication Equipment

REFRIGERANT CIRCUIT TOOLS (8)
Manifold Gauge Set
Evacuation Tools
Charging Tools

AIRFLOW MEASUREMENTS (2)
Airflow Velocity Measurements
Pressure Measurements
Air Volume Measurements

ELECTRICAL (40)
BASIC ELECTRICITY (15)
Electrons In Electricity
Electrical Basic Terms
Power Magnetism
Electrical Loads
DC Circuits
AC Circuits
Intro To Basic Circuit Analysis
Electricity - Generation And Distribution
Solid State Electronics

AC MOTORS (5)
Single Phase Motors Construction
Single Phase Motor Types
Three Phase Motors

ELECTRICAL DIAGRAMS (10)
Symbols
Field Wiring Diagrams
Pictorial Diagrams
Schematic (Ladder) Diagrams

OVERVIEW OF ELECTRICAL TROUBLESHOOTING (10)
Low Voltage Circuits
Line Voltage Circuits

BASIC SYSTEMS & COMPONENTS (30)
INTRODUCTION TO SYSTEMS (4)
Heat Transfer And The Basic Cooling Cycle
Basic Heat Pump Refrigerant Circuit
Heat Pump Refrigeration Cycle Operating Modes
Split Systems
Packaged Systems
Multi-Capacity Systems

COMPONENTS (18)
Refrigerants
Reciprocating Compressors
Scroll Compressors
Lubricants
Outdoor Coils
Indoor Coils
Metering Devices - Fixed
Metering Devices - Variable
Start Assist Components
Blowers & Fans
Grilles, Registers, & Diffusers
Line Sets
Refrigerant Circuit Accessories
Service/Check Valves
Fasteners
Electrical Components
Air Side Components
Reversing Valves

INSTALLATION PROCEDURES (30)
FABRICATING COPPER TUBING (6)
Brazing
Flare Fittings
Bending Copper Tubing
Copper Tubing Preparation
Refrigerant Line Installation

DUCT INSTALLATION (4)
Installing Metal Duct
Installing Flexible Duct
Installing Ductboard
Installing Grilles, Registers, Diffusers & Dampers

INSTALLING ACCESSORIES (3)
Installing Electronic Air Cleaners
Installing Humidifiers
Installing Thermostats

SERVICE & REPAIR PROCEDURES (40)
PREVENTIVE MAINTENANCE (5)
Mechanical Preventive Maintenance
Electrical Preventive Maintenance

DIAGNOSTICS (33)
Preliminary System Diagnostics
Analyzing Reported Symptoms
System Air Side Diagnostics
Refrigerant System Diagnostics
Electrical Checks
Component Checks - Electrical Repair Replacements
System Cleanup After Compressor Electrical Failure
Component Checks - Refrigeration

CONTROLS (30)
ELECTROMECHANICAL SENSING CONTROLS (10)
Electromechanical Wall Thermostat
Electromechanical Temperature Controls
Pressure Controls
Electromechanical Outdoor Thermostat

ELECTRONIC CONTROLS (12)
Overview Of Electronic Controllers
Electronic Thermostats
Zone Controls
Electronic Defrost Controllers
Electronic Compressor Controls
Electronic Timers

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

SAFETY (8)
Hazmat Training
Safe Handling Of Refrigerant Containers
General Personal Safety & Work Practices
Brazing & Soldering Safe Practices
Electrical Safety
Personal Safety Around Moving Machinery

UNIFORM MECHANICAL CODE (2)
Equipment Access
Refrigerant Line Routing
Condensate Drains

DESIGN (30)
BIDS & PROPOSALS (10)
System Sizing
Estimating Installation
Sizing Refrigerant Lines
Electrical

DESIGN CONSIDERATIONS - TOTAL COMFORT (4)
Temperature
Humidity
Indoor Air Quality
Sound Level

DESIGN CONSIDERATIONS - COMPONENTS (5)
Diffusers, Registers, & Grilles Accessories

Sample Questions
Answer key can be found at end of quiz

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 four thermostats for $91.12, what was the price of each thermostat?

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

6. An understanding of an HVAC service company's warranty policies and the ability to discuss them with a customer is the responsibility of the:

a. technician.
b. company sales manager only.
c. manufacturer's sales representative only.
d. equipment distributor.

TOOLS & MEASUREMENTS
7. After cutting copper tubing, the tube edge should be cleaned with a:

a. reduce dehydration time.
b. increase dehydration time.
c. reduce needed charge.
d. increase capacity in cooling.

9. To check a de-energized, normally open relay for fused contacts, a VOM would be set to check:

a. can only clean recovered refrigerant and test it to ARI standards.
b. can clean any refrigerant and test it to ARI standards.
c. can clean any refrigerant but cannot test it to ARI standards.
d. can clean any refrigerant and can test it to EPA standards.

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

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

12. The following readings of a conditioned space were obtained with a sling psychrometer:
Wet bulb =53°FDry bulb =73°F

ELECTRICAL
13.In a simple resistive circuit, the voltage is 24 volts and the current is 8 amps. According to Ohm's law, what is the resistance in the circuit?

a. increases.
b. decreases.
c. stays the same.
d. can either increase or decrease.

15. As the number of poles in a PSC motor are decreased from 4 to 2, what happens to the rpm?

a. the rpm increases
b. the rpm decreases
c. the rpm stays the same
d. the number of poles in a motor has no effect on the rpm

16. Which of the following would a technician use to check the operating sequence of a heat pump?

17. What reason would a technician have for tracing a units' electrical circuit on a sketch pad during troubleshooting procedures?

a. the technician is unable to read wiring diagrams
b. the technician has no prior experience with the unit
c. the unit wiring diagram is missing from the access panel
d. a technician should use a sketch to confirm all components are in place

BASIC SYSTEMS & COMPONENTS
18. Which of the following occurs when a heat pump terminates the defrost cycle?

a. the outdoor fan is shut off
b. the reversing valve switches to the heating mode
c. the reversing valve switches to the cooling mode
d. all auxiliary heat is immediately energized

19. A single trunk duct system that extends in one or two directions from the unit and has multiple branch ducts is called a:

a. perimeter duct system.
b. extended plenum duct system.
c. radial duct system.
d. reducing trunk system.

20. In HVAC equipment, color coded wire is typically used in which of the following applications?

a. in high voltage AC circuits only
b. in high voltage DC circuits only
c. in control or low voltage AC wiring
d. in low voltage DC circuits only

21. Which of the following is the most likely cause of low indoor coil pressure in a properly charged heat pump running in the cooling mode?

a. an undersized metering piston
b. an oversized metering piston
c. excessive blower speed
d. oversized suction line drier

a. condensate overflowing the drain pan.
b. excessive air noise in the piping.
c. ice formation in colder temperatures.
d. condensate running off the evaporator coil.

23. Which of the following is used to automatically bypass refrigerant flow around a metering device in a heat pump circuit?

24. To maintain maximum comfort in a heat pump installation while operating in the heating mode, the duct system must be sized to supply sufficient CFM to match heat loss at:

a. the lowest blower speed.
b. the highest blower speed.
c. at a blower speed to maximize discharge temperature.
d. at a blower speed to minimize discharge temperature.

INSTALLATION PROCEDURES
25. Which of the following joints, when properly done, will best join a copper tube to a copper fitting?

a. allow any accumulated water to evenly run out of the cabinet.
b. increase airflow through the fin area.
c. prevent the unit from tipping over.
d. make certain any top discharge air blows straight up.

a. the outdoor unit only.
b. the indoor unit only
c. both the outdoor and indoor units.
d. either the indoor unit or outdoor unit but not both.

29. A heat pump is supplied from the factory with charge for a 15 foot line set. The dataplate shows the required system charge to be 5 pounds 2 ounces. The line set uses a 3/8 inch liquid line and is 35 feet long. The manufacturers instruction sheet specifies .8 ounces of refrigerant to be added for each added foot of refrigerant line length. What is the additional refrigerant charge required for the system?

30. 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

31. Which of the following would be considered a good location to mount a wall thermostat?

32. Pigtail 120 volt wires should be connected to the supply wiring by twisting the appropriate wires together then insulating and securing each connection with:

33. Maintaining manufacturer specified clearances on all sides of a condensing unit is:

a. necessary in residential applications only.
b. necessary in commercial applications only.
c. only necessary if required by local codes.
d. necessary whenever locating the equipment.

SERVICE & REPAIR PROCEDURES
34. A heat pump operating in the heating mode with inadequate airflow across the indoor coil will typically exhibit which of the following symptoms?

a. a higher than normal temperature rise across the outdoor coil
b. a lower than normal temperature rise across the outdoor coil
c. a higher than normal temperature rise across the indoor coil
d. a lower than normal temperature rise across the indoor coil

35. Excessive liquid line length or lift can cause which of the following conditions?

a. flash gas in the liquid line.
b. low superheat
c. ice formation on the condenser coil
d. high liquid line pressures

36. Pressure readings on an operating heat pump indicate low head pressure and high suction pressure. Which of the following could be a cause of these readings?

a. a clogged filter drier
b. a restricted metering device
c. a reversing valve with an internal leak under the slide
d. operation in the heating mode during very cold outdoor temperatures

37. Which of the following symptoms would a TEV equipped heat pump typically exhibit if the check valve on the outdoor unit were stuck in the closed position?

a. the compressor pumps down in both heating and cooling modes
b. the system performs properly in cooling but the compressor pumps down in heating
c. the system performs properly in heating but the compressor pumps down in cooling
d. the system performs properly in cooling but has extremely high suction pressures in heating

38. A technician would require the outdoor coil pressure and liquid line temperature of a heat pump operating in the cooling mode to determine the:

a. amount of subcooling of the refrigerant at the liquid line
b. total system capacity
c. amount of refrigerant superheat
d. indoor coil temperature

39. A customer had a system installed over a year ago. In the past few months the heat pump 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. bad fan blade.
b. clogged filter.
c. blower motor that is going bad.
d. refrigerant circuit that is leaking.

40. A customer's compressor has failed and they wish to replace the outdoor unit only. To properly replace the unit it must be sized to match:

a. the cooling load of the space.
b. the capacity of the evaporator.
c. the size of the slab.
d. the available clearances around the unit.

CONTROLS
41. A typical heat pump uses a high pressure control to shut off the compressor if the condensing pressures become excessive. This control uses a switch that makes the compressor contactor on pressure:

a. rise at the compressor discharge.
b. fall at the compressor discharge.
c. difference between the high and low side.
d. combined of the high and low side.

42. A simple time activated switch is an example of a control that does not use:

43. Any moisture remaining in a refrigerant circuit after evacuation is removed from the refrigerant by:

44. The addition of a "delay on make" timer to a heat pump outdoor unit will reduce amperage draw on start-up by:

a. allowing refrigerant pressures to equalize by reducing compressor off times.
b. allowing refrigerant pressures to equalize by lengthening compressor off times.
c. decreasing refrigerant pressures by reducing compressor run times.
d. decreasing refrigerant pressures be lengthening compressor run times.

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

REGULATIONS, CODES, & SAFETY
46.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.

a. any equipment using a similar refrigerant.
b. any equipment with the same evaporator pressure.
c. equipment with the same owner as the original equipment.
d. any equipment as long as it is recycled.

a. the current that results when a hermetic compressor is operated at rated load, voltage, and frequency.
b. the current that results when a hermetic compressor is operated under any conditions.
c. the current that results during initial startup of a hermetic compressor.
d. the maximum allowable current for a particular hermetic compressor.

a. maximum CFM per diffuser
b. wire sizing
c. refrigerant line sizing
d. location of condensate drains

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

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

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

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

53. The regulations concerning termination locations of secondary condensate drains for attic mounted horizontal blower coils are found in the:

a. Uniform Mechanical Code.
b. Uniform Building Code.
c. National Fuel Gas Code.
d. National Electric Code.

DESIGN
54.During replacement of a heat pump outdoor unit, the technician used one 7/8" and one 1/2" short radius elbow and the existing copper lines. What was the equivalent length added to the refrigerant lines?

55. Slightly undersizing a heat pump will typically reduce the number of customer complaints in locations with:

a. exceptionally low temperatures in the winter.
b. exceptionally high temperatures in the summer.
c. low humidity levels in the summer.
d. high humidity levels in the summer.

57. The number of air changes recommended for a commercial building can be found in the specifications of:

a. a valve too large will be erratic and a valve too small introduces excessive pressure drop.
b. a valve too small will be erratic and a valve too large introduces excessive pressure drop.
c. the larger the valve the larger its superheat setting.
d. the larger the valve the smaller its superheat setting.

59. What term describes the outdoor conditions at which the cost of heating using gas or oil is the same as when using the heat pump alone?

a. comfort heat index
b. outdoor temperature index
c. the economic balance point
d. the thermal balance point

1 A	11 A	21 A	31 A	41 B	51 C
2 A	12 A	22 A	32 C	42 A	52 B
3 B	13 B	23 B	33 D	43 C	53 A
4 B	14 A	24 B	34 C	44 B	54 D
5 B	15 A	25 C	35 A	45 D	55 D
6 A	16 B	26 A	36 C	46 D	56 C
7 A	17 C	27 D	37 C	47 C	57 B
8 A	18 B	28 C	38 A	48 A	58 A
9 A	19 B	29 C	39 B	49 D	59 C
10 C	20 C	30 D	40 B	50 B

Sample Questions Answer key can be found at end of quiz

Sample Questions
Answer key can be found at end of quiz