Columbia University

On an air-to-air heat pump system, the suction pressure and discharge pressure are low during the cooling months. What are two possible problems: a restricted indoor metering device and a dirty air filter On an air-to-air heat pump system, the discharge pressure and suction pressure are high during the heating months. What are two possible problems: a dirty indoor filter and noncondensables in the system A service call is made on an air-to-air heat pump system during the winter. ...

Which of the following factors affects a customer's level of comfort? a. Air movement b. Humidity c. Temperature d. All of the above d (All of the above: air movement, humidity, temperature) A cooling load calculation estimates the sensible heat gain of a structure. The maximum sensible capacity of a cooling-only system should be within ____% of this calculated value. a. ±10% b. +10% c. +15% d. +30% c (+15%) The maximum sensible cooling capacity of a heat pump shoul...

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 tra...

Mixed refrigerant should They're not easy to reclaim or separate should be labeled and sent to recycling plant can be returned for recycling plant charge a substantial fee for destroying What refrigerant is a HFC R 134 a An azeotrope refrigerant is a mixture of 2 or more refrigerants that behave like a single refrigerant What is the highest SHARE safety standard given to a refrigerant A1 What is a HCFC Hydrochlorofluorocarbon Refrigerant entering the comp...

R-22 vapor line diameters and lengths are typically specified for a... Vapor pressure drop that does not exceed a 6-7psi or 6 degrees 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 fro the outdoor coil to prevent excessive ice build up on the bottom of the coil and reduce capacity The component used to reduce sound ...

What is the purpose of the reversing valve on an air-to-air heat pump: It changes the flow of the refrigerant, making the indoor coil the condenser during the winter months On a reversing-valve solenoid, what is connected to the top tube: the compressor discharge line On a reversing-valve solenoid, what is connected to the bottom center tube: the compressor suction line What pressure difference must be between the low side and the high side of the heat pump system for the...

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 tr...

R-22 vapor line diameters and lengths are typically specified for a vapor pressure drop that does not exceed 6-7 psi or 6 degress 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 build up The component used to reduce sound transmission and prevent water leaks of a packaged hea...

On an R-22 system, line diameters and lengths are typically specified for a vapor pressure drop that does not exceed what? 6-7PSI or 6F What is the primary purpose of using flux when soldering copper or brass parts? 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. Why must the runoff be drained off and away from the outdoor coil? Excessive ice can build up on the bottom of the...

HESI RN EXIT EXAM COMPREHENSIVE 2023 FALL EXAM ACTUAL EXAM CORRECTLY ANSWERED |VERIFIED EXAM|