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Nocti Hvac Final Exam 2025/2026 Questions with Correct Detailed Answers || Already Graded A+ <Latest Version>

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Nocti Hvac Final Exam 2025/2026 Questions with Correct Detailed Answers || Already Graded A+ &lt;Latest Version&gt; 1. When checking a relay coil with an ohmmeter, the coil read ____ ohms if the coil is shorted. - ANSWER 0 2. When checking a relay coil with an ohmmeter, an open coil wo...

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  • January 30, 2025
  • 14
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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Nocti Hvac Final Exam 2025/2026
Questions with Correct Detailed Answers ||
Already Graded A+
<Latest Version>


1. When checking a relay coil with an ohmmeter, the coil read ____ ohms if
the coil is shorted. - ANSWER ✔ 0

2. When checking a relay coil with an ohmmeter, an open coil would read ____
ohms. - ANSWER ✔ infinite

3. When diagnosing the control circuit at the thermostat subbase, between
which two terminals would a jumper wire be placed to check the heating
current? - ANSWER ✔ Red and White

4. When diagnosing the control circuit on the thermostat subbase, between
which two terminals would a jumper wire be placed to check the fan circuit?
- ANSWER ✔ Red and Green

5. Which component on the low voltage circuit of a residential HVAC system
is not a load? - ANSWER ✔ low-pressure control

6. Which component on the low voltage circuit of a residential HVAC systems
is not a switch? - ANSWER ✔ fan relay coil

7. When checking the secondary of a low voltage transformer with an
ohmmeter, if the transformer secondary is open it will read ____ ohms. -
ANSWER ✔ infinite

8. A psychrometer is used to measure - ANSWER ✔ humidity

, 9. The device that maintain the boiler pressure 10 to 15 psi in the system is the
- ANSWER ✔ automatic fill valve

10.leak checking the refrigerant piping whit is in deep vacuum should be
avoided becasue - ANSWER ✔ air and moisture can be pulled in the circuit

11.how often should the oil in a vacuum pump be changed? - ANSWER ✔ after
eached use

12.if the gas furnace is not working and is locked out at circuit board, the best
way to reset the IFC is to - ANSWER ✔ Turn the system switch off and
back on

13.A heat pump designed to work for both heating and cooling. which device
changes the flow of the refregeriant for each mode? - ANSWER ✔ reversing
valve

14.Initation defrost in a heat pump system can be done by the flowing method
timed, electronic board, and - ANSWER ✔ Temperature

15.the permanent storage device found inside a desktop computer is a -
ANSWER ✔ hard drive

16.One chlorine atom can destroy how many ozone molecules? - ANSWER ✔
100,000

17.bad ozone is found in which of the following - ANSWER ✔ troposphere

18.which refrigersant types have a very low GWP? - ANSWER ✔ HFC

19.which type of oil is used in modern automotive air conditioning system? -
ANSWER ✔ Glycols

20.what year did it become necessary for all hvac technitions to become
certified to handle refrigerant under section 608 for thr clean air act? -
ANSWER ✔ 1994

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