The following conditions exist in a circuit that supplies power to three parallel loads:One load is resistive, one load is capacitive, one load is inductiveThe total current in the circuit when operating will be:

D. The sum of the currents through each load

D. The outdoor thermostat is closed

What can happen if defrost runoff is not properly drained away?

B. Ice can build up on the bottom of the coil

D. The outdoor thermostat is closed

C. In the entering airstream to the outdoor coil

Undersized ductwork often cause:

C. High air quantities and high static pressures

C. The discharge line of the compressor

D. System TD, drop, and static pressure

C. Compressor discharge line pressure

Where is the sensor of an outdoor ambient thermostat for a heat pump system typically installed?

C. In the entering airstream to the outdoor coil

B. There is a leak in the system

B. Ice can build up on the bottom of the coil

C. The discharge line of the compressor

What effect does a low charge have on the switch over operations of a reversing valve?

C. Reversing valves are less likely to shift if charge is very low

A. Air moves from the outside to the inside of the coil

C. The discharge line of the compressor

The technician is using an analog multi meter to check a run capacitor. With the meter set to OHMS the needle swings towards zero and then slowly rise is toward infinity. What does this tell the technician about the capacitor?

D. The capacitor charges and discharges

D. The outdoor thermostat is closed

D. The electric element is open

What is the typical method of staging a two stage compressor in a heat pump system?

B. It is based on deviation from the thermostat set point

C. In the entering airstream to the outdoor coil

D. The outdoor thermostat is closed

B. Ice can build up on the bottom of the coil

In a heat pump refrigerant circuit, and open check valve is used to:

A. Bypass refrigerant flow around a metering device

D. Routing refrigerant lines within wall

A. Super heated refrigerant leaving the coil

B. Heating control circuit amperage draw

Referred to the diagram above and answer the question: when troubleshooting and energized electrical circuit on an electric heat section, 244 V is measured across the element at points a and B and no amperage is measured. What is the problem with the system?

D. The electric element is open

D. The outdoor thermostat is closed

What is an important reason for using electronica defrost controls?

A. They provide more accurate control

B. There is a leak in the system

Refrigerant sub cooling is a measurement of the difference between:

C. Condensing saturation temperature and liquid line temperature

D. Suction pressure and suction line temperature

D. Vapor line will be higher and liquid line will be lower

C. Using approved sealant and clamp

What measurements would be needed to properly evaluate a complaint of drafty operation with a heating system?

D. System TD, drop, and static pressure

C. High air quantities and high static pressures

C. Compressor discharge line pressure

A suction line accumulator should be used in a residential heat pump only when recommended by the manufacturer is:

A. Long refrigerant lines increase system charge over recommended maximum charge

D. Routing refrigerant lines within wall

A. Bypass refrigerant flow around a metering device

D. Isolating refrigerant lines from direct contact with structure

A reason for cool air complaints when a heat pump is operating in the heat cycle is:

C. Excessive supply air velocities

A. Excessive liquid line length or lift

Suction line low pressure controls are often used in heat pumps to protect the compressor:

D. If suction pressure drops too low and to detect a loss of charge

A. Air moves from the outside to the inside of the coil

D. Suction pressure and suction line temperature

D. System TD, drop, and static pressure

The minimum circuit ampacity (MCA) listed on the data plate of a package to heat pump is used to determine:

C. Have no effect on the gauge reading

D. The sum of the currents through each load

B. Heating control circuit amperage draw

In heating mode, a manifold gauge set is connected to the vapor and liquid line service valves of a properly charge system. What would the expected pressure be?

D. Vapor line will be higher and liquid line will be lower

D. Routing refrigerant lines within wall

A. Excessive liquid line length or lift

A. Super heated refrigerant leaving the coil

Which of the following are temperatures used by electronica demand defrost controls?

A. Outdoor coil and outdoor air

What could cause a customer to complain that their single zoned home system in cooling mode feels sticky or damp?

C. Returns pulling in unconditioned air

A. Outdoor coil and outdoor air

B. Controlling of multiple zones

An electronica room thermostat without remote sensors may have a feature that allows:

B. Controlling of multiple zones

What is the thermal balance point of a dual fuel heat pump?

C. The outdoor conditions at which the capacity of auxiliary heat alone matches the heating load

C. Check for continuity between the compressor terminals and ground with an ohmmeter

B. The pressure drop in the outdoor coil of a heat pump must be minimized

D. The sum of the currents through each load

What is the relationship between inrush current and holding current of a relay coil?

C. In rush current is always better than holding current

C. In the entering airstream to the outdoor coil

B. There is a leak in the system

What measurements are needed to determine low side superheat?

D. Suction pressure and suction line temperature

C. Condensing saturation temperature and liquid line temperature

D. System TD, drop, and static pressure

C. Compressor discharge line pressure

Using a voltmeter, how does a technician determine voltage drop on the outdoor unit of a heat pump?

D. With the outdoor unit not operating and then with the outdoor unit operating

B. It is based on deviation from the thermostat set point

C. Current increases and the motor may trip on overload

C. In the entering airstream to the outdoor coil

A line voltage fuse is sized to:

D. Protect from excessive voltage

What is the effect of 170 V supplied to way 208/230 V compressor?

C. Current increases and the motor may trip on overload

B. Ice can build up on the bottom of the coil

D. Place the cabinet on an isolation pad

D. The sum of the currents through each load

The technician suspects that an outdoor thermostat used to bring on auxiliary he may be out of calibration. The thermostat is a close on fall type that is adjustable. One method for checking the thermostats calibration is to:

A. Manually rotate the shaft until the thermostat closes and compare the dial setting to an accurate outdoor temperature reading +10°F

A. The unit is low on charge and charge needs to be added

D. With the outdoor unit not operating and then with the outdoor unit operating

C. The outdoor conditions at which the capacity of auxiliary heat alone matches the heating load

what is a primary consideration when bending soft copper tubing into a bed of any radius?

C. The cross-sectional area of the tube must not be significantly reduced

D. Suction pressure and suction line temperature

B. The setting that brings on the medium high blower speed

D. The outdoor thermostat is closed

A technician checks a package heat pump operating in cooling and find the following conditions: The unit has a piston type metering device on both the indoor and outdoor coils, outdoor temperature 75°F, superheat 55°Fwhat is the diagnosis and corrective action?

A. The unit is low on charge and charge needs to be added

C. Up and discharge pressure goes down

C. The discharge line of the compressor

D. The capacitor charges and discharges

What is one consideration when securing a refrigerant line set to reduce indoor operating sound?

D. Isolating refrigerant lines from direct contact with structure

A. Bypass refrigerant flow around a metering device

D. Routing refrigerant lines within wall

C. High air quantities and high static pressures

What describes the airflow path of an outdoor pull through coil?

A. Air moves from the outside to the inside of the coil

B. Ice can build up on the bottom of the coil

A. Super heated refrigerant leaving the coil

C. In the entering airstream to the outdoor coil

What type of blower is most commonly used in an indoor residential unit?

B. Forward curved centrifugal fan

Heat Pump Study Guide

Authored by Michael Wilson

Science

12th Grade

NGSS covered

Used 7+ times

AI Actions

Add similar questions

Adjust reading levels

Convert to real-world scenario

Translate activity

More...

Content View

Student View

100 questions

Show all answers

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

With an R-410A condensing pressure of 395 psig and a liquid line temperature of 108°F what is the sub cooling temperature?

A. Cool

B. 3 psi

B. 30°F

D. 8°F

When performing maintenance on a heat pump the technician should check the outdoor fan to be certain:

C. The maximum fuse or a circuit breaker size

C. The fan runs freely without binding or vibrations

B. The relative humidity is very high

D. The valve will vibrate or chatter

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The continuity of a fuse in a disconnect should be tested by checking resistance:

A. Volts

C. 500 microns

A. With power off

A. Cool

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why does the outdoor fan on a heat pump stopped during defrost?

D. On the shorter sides

C. Additional resistor

C. 500 microns

C. Minimize defrost time

It technician measures the return air temperature of 100,000 BTU output furnace to be 65°F and the supply side air temperature is 135°F. what is the SCFM(standard CFM)?

B. 3 psi

C. 25 amps

B. 30°F

B. 1323 SCFM

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The following measurements are recorded on an operating heat pump system. The heat pump is operating with the compressor only with no auxiliary heat.-heat pump only supply air temperature 92°F, heat pump only return air temperature 70°F, outdoor temperature 54°F, supply air temp./Auxiliary heat on 115°F, return air temp./Auxiliary heat on 70°F, CFM 1228What is the heating capacity of the unit in BTU/H?

B. 0.5 IWC

C. 25 amps

D. 5000 V

D. 29,177 btu/h

R-410A Vapor in line diameters with links 50 feet or less are typically specified for a vapor pressure drop that does not exceed what value?

A. Volts

B. 3 psi

B. 0.5 IWC

B. 30°F

Access all questions and much more by creating a free account

Create resources

Host any resource

Get auto-graded reports

Continue with Google

Continue with Email

Continue with Classlink

Continue with Clever

or continue with

Microsoft

Apple

Others

Already have an account?

Similar Resources on Wayground

104 questions

Biomedical Innovations

Quiz

•

12th Grade

99 questions

Đề Cương Sinh 12A2

Quiz

•

12th Grade

102 questions

Astronomy Quiz

Quiz

•

10th Grade - University

103 questions

Physical Science Final

Quiz

•

9th - 12th Grade

100 questions

Earth's Atmosphere Review

Quiz

•

9th Grade - University

104 questions

,,,...GB

Quiz

•

12th Grade

100 questions

ลักษณะสิ่งมีชีวิต charecteristic of LT1

Quiz

•

9th - 12th Grade

100 questions

Brain Plasticity

Quiz

•

10th - 12th Grade

Popular Resources on Wayground

15 questions

Fractions on a Number Line

Quiz

•

3rd Grade

20 questions

Equivalent Fractions

Quiz

•

3rd Grade

25 questions

Multiplication Facts

Quiz

•

5th Grade

$fractions$

22 questions

fractions

Quiz

•

3rd Grade

20 questions

Main Idea and Details

Quiz

•

5th Grade

20 questions

Context Clues

Quiz

•

6th Grade

15 questions

Equivalent Fractions

Quiz

•

4th Grade

20 questions

Figurative Language Review

Quiz

•

6th Grade

Discover more resources for Science

14 questions

Natural Selection and Adaptation

Lesson

•

9th - 12th Grade

38 questions

Water Cycle and Groundwater

Quiz

•

9th - 12th Grade

12 questions

Cell Organelles and Their Functions

Lesson

•

9th - 12th Grade

13 questions

Amoeba Sisters: Biomolecules

Interactive video

•

9th - 12th Grade

25 questions

APES Unit 6 Review

Quiz

•

12th Grade

60 questions

2025 Genetics Test Study Guide

Quiz

•

9th - 12th Grade

10 questions

Understand Cell Functions and Organelles

Quiz

•

9th - 12th Grade

16 questions

Explore Cell Cycle Stages and Mitosis

Quiz

•

9th - 12th Grade

Heat Pump Study Guide

With an R-410A condensing pressure of 395 psig and a liquid line temperature of 108°F what is the sub cooling temperature?

When performing maintenance on a heat pump the technician should check the outdoor fan to be certain:

The continuity of a fuse in a disconnect should be tested by checking resistance:

Why does the outdoor fan on a heat pump stopped during defrost?

It technician measures the return air temperature of 100,000 BTU output furnace to be 65°F and the supply side air temperature is 135°F. what is the SCFM(standard CFM)?

R-410A Vapor in line diameters with links 50 feet or less are typically specified for a vapor pressure drop that does not exceed what value?

Which of the following is used to make accurate residential loan calculations?

The following conditions exist in a circuit that supplies power to three parallel loads:One load is resistive, one load is capacitive, one load is inductiveThe total current in the circuit when operating will be:

what condition can cause a reduction from design capacity in a heat pump?

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Science