Subcooling - Study guides, Class notes & Summaries

BOMA – HVAC QUESTIONS AND ANSWERS 100% PASS Two basic categories of chillers are the compression cycle and absorption The five requirements for comfort are proper temperature, humidity, filtration, and ventilation circulation The primary function of an expansion device is to produce a reduction in the pressure on the liquid refrigerant, regulate the flow of refrigerant into the evaporator, lower the boiling point of the refrigerant far enough below the temperature of the load to g...

1. Heat which causes a change in temperature of a substance is called; A. latent heat B. sensible heat C. superheat D. radiant heat - B. sensible heat 2. Heat added to a substance without a raise in temperature; (example: liquid refrigerant to gas) this process is called? A. latent heat of vaporization B. latent heat of fusion. C. superheat of vaporization D. superheat of fusion - A. latent heat of vaporization 3. Heat added to the refrigerant in a vapor state after the evaporation pr...

HVAC pre-test questions and answers graded A+ Two basic categories of chillers are Compression cycle and absorption The 5 requirements for comfort are temperature, humidity, filtration, ventilation and _______ Circulation The primary function of an expansion device is to: Reduce pressure on liquid refrig, regulate flow, lower the boiling point below the temp of the load All of the above The wet-bulb depression is The difference between the dry-bulb and wet-bulb temperatures T...

CSN AC 110 Esco Exam Practice Questions and Answers 100% Solved 1. Heat which causes a change in temperature of a substance is called; A. latent heat B. sensible heat C. superheat D. radiant heat ️️B. sensible heat 2. Heat added to a substance without a raise in temperature; (example: liquid refrigerant to gas) this process is called? A. latent heat of vaporization B. latent heat of fusion. C. superheat of vaporization D. superheat of fusion ️️A. latent heat of vaporization...

HVAC-E Quiz 1. An overcharge of refrigerant will cause: Increased head pressure 2. High pressure gauge reads 146 psig and the liquid line temperature at the condensing unit is 95°F. What is the operating systems sub-cooling?: 35°F subcooling 3. A partially clogged capillary tube can cause.: A starved evaporator 4. An increase in head pressure causes __________ refrigerant to flow through

NATE AC Service Certification/ 99 Questions with Certified Solutions. Terms like: An air conditioner refrigerant circuit should be evacuated to a minimum of: A. 0 microns. B. 200 microns. C. 500 microns. D. 1200 microns. - Answer: C. 500 microns. Which of the following substances could create an extremely dangerous condition if used to check refrigeration system for leaks? A. R-22 B. Nitrogen C. Oxygen D. Carbon Dioxide - Answer: D. Carbon Dioxide The subcooling method for ...

1. Heat which causes a change in temperature of a substance is called; A. latent heat B. sensible heat C. superheat D. radiant heat - B. sensible heat 2. Heat added to a substance without a raise in temperature; (example: liquid refrigerant to gas) this process is called? A. latent heat of vaporization B. latent heat of fusion. C. superheat of vaporization D. superheat of fusion - A. latent heat of vaporization 3. Heat added to the refrigerant in a vapor state after the evaporation pr...

1. Heat which causes a change in temperature of a substance is called; A. latent heat B. sensible heat C. superheat D. radiant heat - ans-B. sensible heat 2. Heat added to a substance without a raise in temperature; (example: liquid refrigerant to gas) this process is called? A. latent heat of vaporization B. latent heat of fusion. C. superheat of vaporization D. superheat of fusion - ans-A. latent heat of vaporization 3. Heat added to the refrigerant in a vapor state aft...

HVAC CONTRACTOR EXAM QUESTIONS AND ANSWERS 100% PASS An instrument that measures potential differences between 2 points in an electrical circuit is called? A. potentiometer B. thermistor C. ohmeter D. voltmeter - Correct Answer ️️ -voltmeter This device uses a thermal sensing bulb at the outlet of the evaporator to sense temperature and control superheat A. automatic expansion valve B. thermostatic expansion valve C. low side float D. schraeder valve - Correct Answer ️️ -the...

The difference between the evaporator temperature and the suction line temperature at the coil outlet is: a. superheat b. latent heat c. artificial heat d. extended heat 2- A typical evaporator temperature in an air conditioning system with 75° return air is: a. 25° b. 40° c. 55° d. 75° 3- A typical evaporator temperature in a 35° medium temperature walk-in system is: a. 25° b. 40° c. 55° d. 75° 4- The TD (temperature difference) between evaporator and box temperature of a reach...