Purpose of economizer - Study guides, Class notes & Summaries

The primary purpose of using flux when soldering copper or brass parts is to: prevent oxidation. Light commercial outdoor condensing units that are installed in geographic areas where snowfalls can be heavy must be mounted: with wind barriers on all sides. Proper ductwork connections and sealing is critical to good system performance. Conditions are: Return side air leak of 15 % in a ventilated attic 2.5 ton system rated at 1,000 CFM. Attic Air 95°F The loss in delivered capacity is...

A system is supplied from the factory with charge of 5 pounds 10 ounces for a 15 foot line set. The line set is 25 feet long. The manufacturer's instruction sheet specifies 0.6 ounces of refrigeration to be added for each added foot of refrigerant line set length. What is the total refrigerant charge for the system? A. 6 ounces B. 5 pounds C. 5 pounds 10 ounces D. 6 pounds - D. 6 pounds 15ft - 25ft = 10ft x .6 = 6 ounces 5 pounds + 10 ounces + 6 ounces 5 pounds + 16 ounces = 6 pound...

A technician has determined a supply in a flexible duct system is leaking. What should be checked? - All connections inner and outer layers. Electronic air cleaners can operate with internal voltages as high as? - 5000v Why do some electromechanical type thermostats require connections to both the hot side and common side of the low voltage transfromer - Display lights must be powered using both sides of the line the continuity reading on a functional fuse will be - 0 ohms a compress...

NATE AC Service Certification exam with correct answers 2024 update A system is supplied from the factory with charge of 5 pounds 10 ounces for a 15 foot line set. The line set is 25 feet long. The manufacturer's instruction sheet specifies 0.6 ounces of refrigeration to be added for each added foot of refrigerant line set length. What is the total refrigerant charge for the system? A. 6 ounces B. 5 pounds C. 5 pounds 10 ounces D. 6 pounds - answer The purpo...

ABSA B1 Study Bank Questions with 100% correct Answers Packaged watertube boilers capacities range from? a. 2300 kg to 65000 kg per hour b. 500 kg to 100 mg per hour c. 15 psi to 15000 kg per hour d. 65000 to 100000 kg per hour - answerA The main advantage of the packaged boiler is its a. small size b. compact design c. low cost D. quality steam - answerC Feild erected boilers have outputs of? A 75,000 kg/h B 100,000 kg/h C 100 mg/h D 150,000 kg/h or more - answerD Where electri...

Written Z51 Questions And Answers Latest Top Score. The efficiency of the refrigerant cycle is affected by the operation of the condenser. of the following. a more efficient centrifugal compressor operation results from: - correct answer. Lowering the condensing pressure The heat removed from the refrigerant in a condenser is: - correct answer. Sensible and latent heat The refrigerant unit that you have been assigned to is being taken out of service for a major repair. you hav...

FUEL METERING SYSTEMS (3) QUESTIONS AND ANSWERS What is the relationship between the accelerating pump and the enrichment valve in a pressure injection carburetor? - Correct Answer-No relationship since they operate independently. The back-suction mixture control system operates by - Correct Answer-varying the pressure acting on the fuel in the float chamber. Where is the throttle valve located on a float-type carburetor? - Correct Answer-After the main discharge nozzle and venturi. If...

3rd Class Stationary Steam Engineer License Prep _________ are necessary for complete combustion time, temperature, mixture, and atomization if the steam pressure gauge indicates 200 PSIG, the absolute pressure is______ 214.7 a boiler is operating at 400 PSI, and the safety valve opens at 410 PSI and closes at 398 PSI. The blowdown is______psi 12 an oil cooler is commonly used with a(n) ________ when operating in conjunction with a turbo generator steam turbine a boiler is producin...

FDNY Z51/ Z-51 REFRIGERATION EXAM TEST ACTUAL EXAM 250 QUESTIONS AND COMPLETE WELL EXPLAINED ANSWERS WITH RATIONALE 100% CORRECT VERIFIED BY EXPERTS AND GRADED A+ LATEST UPDATE 2024[ALREADY PASSED] toxicity The efficiency of the refrigerant cycle is affected by the operation of the condenser. of the following. a more efficient centrifugal compressor operation results from: Lowering the condensing pressure The heat removed from the refrigerant in a condenser is: Sensible and latent heat The r...

FDNY z51 FINAL EXAM Questions & Answers Latest Update Already Passed The efficiency of the refrigerant cycle is affected by the operation of the condenser. of the following. a more efficient centrifugal compressor operation results from: - ANSWER Lowering the condensing pressure The heat removed from the refrigerant in a condenser is: - ANSWER Sensible and latent heat The refrigerant unit that you have been assigned to is being taken out of service for a major repair. you have b...