What is superheat Study guides, Class notes & Summaries

EPA SECTION 608 CORE (2021-2022 revision) A disposable cylinder should be reduced to what pressure before scrapping? a. 0 psig b. 20 psig c. 50 psig d. 80 psig A major system repair is being performed on a R-22 appliance. What CANNOT be done to recharge the appliance? a. Add R-22 after the repair is complete. b. Retrofit the unit to R-407C. c. Use recovered or recycled R-22 from the same owner. d. Top off the unit with R-410a. A refillable cylinder must not be filled above what ...

2024 update DC Third testing Questions and Answers 100% Pass The component in which liquid vapor by absorbing heat is called? - Correct Answer ️️ - Evaporator Select the best answer electrical grounding method? - Correct Answer ️️ -Metal stake drive 8 foot into the ground. A _____ valve should be used for throttling purpose? - Correct Answer ️️ -Globe What is the acceptable range for residual sodium sulfite in the boiler maintain? - Correct Answer ️️ -30-70 What is the B...

HVAC CONTRACTOR EXAM QUESTIONS AND ANSWERS ALREADY PASSED An instrument that measures potential differences between 2 points in an electrical circuit is called? A. potentiometer B. thermistor C. ohmeter D. voltmeter 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 thermostatic expansion valve when...

A restriction in the liquid line after the receiver(or condenser) will cause low or high subcool? - Normal actually since refrigerant not used in the evaporator is stored in the receiver. A restriction in the liquid line after the receiver(or condenser), the condensing temperature will be... - Low due to little heat from evaporator A restriction in the liquid line after the receiver(or condenser), the evaporating temperature will be... - Low A restriction in the liquid line after the recei...

With the condensing pressure and compressor speed remaining constant, a decrease in suction pressure will cause a(n): a. Decrease in compressor capacity and decrease in current. b. Increase in compressor capacity and decrease in current. c. Increase in compressor capacity and increase in current. d. Decrease in compressor capacity and increase in current. - D An indication of non-condensable gas in a refrigeration system is significantly: a. Lower-than-normal suction pressures. b. higher-than-no...

With the condensing pressure and compressor speed remaining constant, a decrease in suction pressure will cause a(n): a. Decrease in compressor capacity and decrease in current. b. Increase in compressor capacity and decrease in current. c. Increase in compressor capacity and increase in current. d. Decrease in compressor capacity and increase in current. - D An indication of non-condensable gas in a refrigeration system is significantly: a. Lower-than-normal suction pressures. b. higher-than-no...

With the condensing pressure and compressor speed remaining constant, a decrease in suction pressure will cause a(n): a. Decrease in compressor capacity and decrease in current. b. Increase in compressor capacity and decrease in current. c. Increase in compressor capacity and increase in current. d. Decrease in compressor capacity and increase in current. - D An indication of non-condensable gas in a refrigeration system is significantly: a. Lower-than-normal suction pressures. b. higher-than-no...

With the condensing pressure and compressor speed remaining constant, a decrease in suction pressure will cause a(n): a. Decrease in compressor capacity and decrease in current. b. Increase in compressor capacity and decrease in current. c. Increase in compressor capacity and increase in current. d. Decrease in compressor capacity and increase in current. - D An indication of non-condensable gas in a refrigeration system is significantly: a. Lower-than-normal suction pressures. b. higher-than-no...

Main propulsion Boiler Operation Exam Questions With Correct Answers, Latest Updated 2024/2025 (GRADED) Boiler overload capacity is normally what percentage of boiler full power capacity? - Answer 120% A pressure specified by the boiler manufacturer as a criterion for the boiler design is termed as? - Answer Design pressure What is the minimum steam drum pressure on an operating boiler? - Answer 85% of boiler operating pressure What is the minimum steam drum pressure on an operating boiler...

An instrument that measures potential differences between 2 points in an electrical circuit is called? A. potentiometer B. thermistor C. ohmeter D. voltmeter : 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 : thermostatic expansion valve 2 | P a g e when installing a reversing valve on a heat pump, how man...