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Exam (elaborations)
NATE Heat Pump Retail Ready Exam and Answers
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---14August 20252025/2026A+
- R-22 vapor line diameters and lengths are typically specified for a: - Vapor pressure drop 
that does not exceed 6 - 7 psi or 6°F. 
The primary purpose of using flux when soldering copper or brass parts is to: - Prevent 
oxidation. 
The water that results from a defrost cycle of an air to air heat pump (runoff) must: - Drain 
off and away from the outdoor coil to prevent excessive ice can build up on the bottom of the 
coil and reduce capacity. 
The component used to reduce sound transmission a...
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ProfessorFrancis
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Exam (elaborations)
NATE HEAT PUMP RETAIL 2024 Questions with 100% Correct Answers
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---13July 20242023/2024A+
- Advanced Patho NURS 5315 exam 1 
action potential 
The process by which excitable cells transmit information from one to another. 
 
 
How is the action potential altered by a potassium imbalance? (Hyperkalemia) 
The ECF has more K+ ions. The membrane potential becomes more positive (hypopolarized). 
Cells become MORE excitable. 
T waves peak. 
QRS complexes widen. 
Causes dysrhythmias, weakness, paresthesia. 
{If membrane potential becomes equal to threshold potential cardiac standstill occurs}...
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