Hvac final accurate - Study guides, Class notes & Summaries

Hvac 208 final exam Accurate Questions And Answers! What is the function and operation of a reversing valve - ANSWER Reverses refrigerant flow and provides both heating and cooling. Diverts the discharge gas. What are common failures of reversing valves and causes - ANSWER Stuck valve Overheating Bad coil Leaking by from discharge gas flowing back into the suction line How is metering of refrigerant accomplished with a heat pump? - ANSWER We need to add check valves bypass lines and ...

HVAC Final Exam 5 ACCURATE Questions and Answers(RATED A+) A load is an electrical device that _____________________________ - ANSWER uses electricity to do useful work A disconnect switch is used to __________ - ANSWER open and close the main power source to a piece of equipment which of the following are not components of a contactor or relay? - ANSWER thermal element Loads are electrical devices that consume electricity to do _______________ work - ANSWER useful _____ are devic...

HVAC Final Exam 3 Accurate Questions & AnswThe current draw in a series circuit is _____________. - ANSWER the same throughout the entire circuit The voltage drop of a series circuit is _____ - ANSWER equal to the sum of the voltage lost through each load in a circuit Two identical 115-volt light-bulbs connected in series with 240 volts would____ - ANSWER burn correctly Parallel Circuits are used in the air conditioning industry because _______ - ANSWER each load in the system needs ful...

HVAC II Final Exam Review| 50 Questions | Accurate Answers. IF a heat pump works normally in the heating mode but will not provide cooling or a defrost mode, which component is most likely defective? - ANSWER Reversing valve Air-to-air heat pumps produce heat by - ANSWER extracting heat from the outdoor air and transferring it to the indoor air In addition to the reversing valve, the other major difference between a heat pump and a cooling only system is - ANSWER heat pumps require two ...

HVAC final exam, unit 15 Accurate 100%(RATED A+) A control can be which of the following? - ANSWER All of the above An example of a power consuming device would be a(n) ____ while an example of a non-power consuming device would be a(n) _____. - ANSWER Light bulb, single-pole single-throw switch An electrical power consuming component. - ANSWER is also known as a load The line side of a switch is the. - ANSWER side the power source is connected to If an air conditioning system i...

HVAC final exam, unit 14 Accurate 100%(GTo control ice build-up on a heat pump outdoor coil in the heating cycle, a ____ is attached to a large diaphragm. - ANSWER Microswitch The heater in the thermostat control circuit in the cooling mode is active when the - ANSWER Cooling contact is open If the suction pressure of a system is 60 psi and the oil pump is 85 psig, what is the net oil pressure? - ANSWER 25 psig What is meant by the term "detent" ? - ANSWER opening or closing of a cont...

HVAC Electrical Final Test Exam With 100% Correct Answers 2024 Split-phase motor PSC CSCR Shaded pole motor Resistance reading to ground from the terminal of a good compressor CSR Best starting and running single-phase compressor - answerA. Uses a start and run winding B. Uses a run capacitor C. Uses a run capacitor, start capacitor, and potential relay D. Simplest motor E. 3 megohms F.Only uses a start capacitor G. CSCR motor How much resistance will be measured in a circuit with...

HVAC final exam, unit 14 Accurate Questions & Answers. When a water regulating valve is used to control the head pressure of a water-cooled system, the valve's spring is acting against which pressure to modulate the water flow? - ANSWER Head pressure of the system To prove that the combustion blower motor is operating before ignition, a ______ would be used. - ANSWER Sail switch The difference between system overshoot and system lag is called? - ANSWER Temperature swing The purpose ...

Level 1 Final Review Accurate 100%(GRADED A+)Natural Gas Furnace - ANSWER Heating Method most commonly used as a heat source in cold climates Ultraviolet light - ANSWER Device used to maintain indoor air quality transfer heat from the air to the refrigerant - ANSWER purpose of evaporator in refrigerant cycle refrigerant is warmer than the outdoor air - ANSWER heat can be transferred from a refrigerant to the outdoors on a hot day because provides pressure drop - ANSWER expansion devi...

An estimator is preparing a bid for a home remodeling project. She has determined that the new garage needs 324 feet of 2x10 lumber; the new rec room requires 430 feet; and the new upstairs bonus room needs 283 feet. How many feet of 2x10 lumber will be needed? - 1,037 feet A plumbing contractor bid the rough-in work for a new three story office building based an estimate of 850 hours of a journey-level plumber's time on the job. After the job was in progress, the contractor determined tha...