Heat Pumps
Heat Pumps1
Start
Congratulations - you have completed Heat Pumps1.
You scored %%SCORE%% out of %%TOTAL%%.
Your performance has been rated as %%RATING%%
Your answers are highlighted below.
Question 1 |
Refer to the attached figure. If neither the compressor nor outdoor fan is running, but the indoor
fan is running and the thermostat is calling for heat, the most likely cause is that _____.
A | both motors have failed |
B | the unit is in the defrost mode |
C | the compressor contactor is defective |
D | the FAN switch is in the ON position |
Question 2 |
One of the problems with using water as a both a heat source and a heat sink in water to water heat pumps is _____.
A | the use of unsuitable water results in the need for excessive maintenance |
B | water doesn't make a good refrigerant |
C | water source systems require frequent defrost
|
D | water is subject to large temperature swings |
Question 3 |
In an air to water heat pump, water is the _____________.
A | refrigerant |
B | catalyst |
C | secondary medium |
D | heat source |
Question 4 |
Which of the following is true with respect to the efficiency of a heat pump?
A | It loses heating efficiency as the outdoor temperature falls. |
B | It loses cooling efficiency as the outdoor temperature falls. |
C | It consumes more energy than it produces. |
D | The balance point changes as the outdoor temperature falls. |
Question 5 |
In an air to air heat pump, defrost is generally accomplished by____________
A | throwing hot water on the outdoor coil |
B | switching the unit into the heating mode |
C | turning the unit off until the frost buildup melts |
D | switching the unit into the cooling mode |
Question 6 |
The four-way (reversing) valve switches the heat pump from cooling to heating by _____.
A | turning on the electric heaters |
B | reversing the flow of refrigerant through the compressor |
C | reversing the flow of refrigerant through the indoor and outdoor coils |
D | using a check valve to bypass the metering device |
Question 7 |
When electric heat is used to supplement reverse cycle heat, how many Btus of heat does it deliver
for each kilowatt of power that it consumes?
A | 220 |
B | 3.768 |
C | 3,413 |
D | 1 |
Question 8 |
The ratio of heat delivered to energy consumed in operating the heat pump is known as the _____.
A | performance ratio |
B | SEER |
C | COP |
D | balance point |
Question 9 |
Which of the following can be determined by calculating the heat pump's balance point?
A | The cooling efficiency of the heat pump. |
B | The amount of supplementary heat required. |
C | When the heat pump is properly leveled on its pad. |
D | The voltage differential between phases in a three-phase system. |
Question 10 |
Heat pump systems that have only a coil, fan, and metering device in the outdoor unit are called
_____.
A | triple-split systems |
B | incomplete systems |
C | split systems |
D | packaged units |
Question 11 |
Refer to the attached figure. If the heat pump is in the defrost mode with the compressor running,
and cold air is blowing into the conditioned space, the most likely cause is that _____.
http://tekassistclasses.com/wp-content/uploads/2012/01/HP-SCHEMATIC2.pdf
A | heating relay HR1 is defective |
B | the indoor fan relay is stuck in the closed position |
C | the reversing valve is defective |
D | the outdoor thermostat (ODT) is defective |
Question 12 |
Refer to the attached figure. If the normally open IFR contacts in the current path of the indoor fan
motor were unable to close, the fan would _____.
http://tekassistclasses.com/wp-content/uploads/2012/01/HP-SCHEMATIC3.pdf
A | run when the FAN switch was in the ON position |
B | never run |
C | run constantly |
D | run when the unit was in defrost |
Question 13 |
Refer to the attached figure. When an air-to-air heat pump is in the defrost mode, _____.
http://tekassistclasses.com/wp-content/uploads/2012/01/HP-SCHEMATIC5.pdf
A | both fans shut off |
B | the indoor fan shuts off and the outdoor fan remains on |
C | both fans remain on |
D | the indoor fan remains on and the outdoor fan shuts off |
Question 14 |
When selecting the location for the outdoor unit of a split system heat pump, it is necessary to
_____.
A | place the outdoor unit as far away from the indoor unit as possible |
B | place the unit as close to the building as possible to reduce the amount of exposed ductwork |
C | install the unit near the structure, but away from windows and neighboring structures |
D | install the unit on the roof if the area receives snow in the winter |
Question 15 |
The likely cause of airflow problems in a heat pump system that has worked satisfactorily in the
past would include all of the following except _____.
A | dirty filters |
B | a slipping blower motor drive belt |
C | an undersized blower motor |
D | dirty coils |
Question 16 |
To transfer heat to and from the conditioned space, geothermal heat pump systems use _____.
A | lakes and ponds |
B | a domestic water supply |
C | coils of tubing buried beneath the ground |
D | one well to draw water and another to discharge it |
Question 17 |
The vertical loop approach in a geothermal system is best suited for a _____.
A | home on a very large, open lot |
B | mountain home built over rock |
C | home on property that includes a large pond nearby |
D | home situated on a small lot |
Question 18 |
A liquid accumulator is often installed in heat pumps _____.
A | to capture defrost water from the outdoor coil |
B | to capture excess liquid refrigerant before it reaches the compressor |
C | when the system is used in colder climates |
D | to increase overall energy efficiency |
Question 19 |
The function of the limit switch in an electric heat assembly is to _____.
A | limit the voltage applied to the rated voltage of the element |
B | control the number of heating elements to be energized |
C | ensure the electric heat remains off during setback |
D | de-energize the heating element when the temperature exceeds the switch setting |
Question 20 |
A unit's cooling output in Btus for its normal annual usage period, divided by the total energy
consumed for the same period, is the basis for calculating the _____.
A | SEER |
B | balance point |
C | electrical power circuit size |
D | HSPF |
Once you are finished, click the button below. Any items you have not completed will be marked incorrect.
Get Results
There are 20 questions to complete.
← |
List |
→ |
Return
Shaded items are complete.
1 | 2 | 3 | 4 | 5 |
6 | 7 | 8 | 9 | 10 |
11 | 12 | 13 | 14 | 15 |
16 | 17 | 18 | 19 | 20 |
End |
Return
You have completed
questions
question
Your score is
Correct
Wrong
Partial-Credit
You have not finished your quiz. If you leave this page, your progress will be lost.
Correct Answer
You Selected
Not Attempted
Final Score on Quiz
Attempted Questions Correct
Attempted Questions Wrong
Questions Not Attempted
Total Questions on Quiz
Question Details
Results
Date
Score
Hint
Time allowed
minutes
seconds
Time used
Answer Choice(s) Selected
Question Text
All done
Need more practice!
Keep trying!
Not bad!
Good work!
Perfect!