Hvac

HVAC FINAL EXAM QUESTIONS WITH COMPLETE SOLUTIONS VERIFIED GRADED A+ Which of the following would have the greatest effect on the heat content of the refrigerant? A) The refrigerant's humidity B) The refrigerant's state C) The refrigerant's temperature D) The refrigerant's pressure Correct Answer B) The refrigerant's state A mechanical refrigeration system cools a room by: Removing heat from the room. The four types of cooling mechanisms are: Evaporative, Thermoelectric, ...

RESIDENTIAL HVAC INSTALLATION EXAM QUESTIONS WITH COMPLETE SOLUTIONS VERIFIED GRADED A+ Clearance tolerances are such that the ordinary clean refrigerant oil can be used satisfactorily in a vacuum pump. false The maximum recommended pressure for leak testing is 150 psig on the low-pressure side of the system. true Noncondensable gases ____. are undesirable in a refrigeration system To pull a vacuum means to ____. lower the pressure in a refrigeration system below atmospheric A(n) _ pr...

HVAC EXAM QUESTIONS AND ANSWERS 100% SOLVED GRADED A+ LATEST UPDATE 2024 Heat Transfer Moves from one substance to another as well as between molecules of a substance, temperature is the driving force Temperature The level of heat or heat intensity, measured with thermometers Heat Is the motion of molecules, and travels from a warm substance to a cold substance Conduction Energy travelling from one molecule to another, involves direct contact Radiation Passes through air and heats the ...

HVAC KY598 JOURNEYMAN EXAM PREP QUESTIONS AND VERIFIED CORRECT ANSWERS GRADED A+ Soldering on a metal portion of a hydronic piping system shall be performed a minimum of ________ inches from any plastic to metal adapter in the same water line. 18 Where gas piping is required to be installed in conduit and one end terminates outdoors, the conduit must extend not less than ________ inches outside the building. 4 Domestic clothes dryer exhaust ducts shall be constructed of metal not less tha...

OK HVAC JOURNEYMAN TEST EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED GRADED A+ C- leaky suction valve A deep vacuum is an evacuation method in which a technician uses a vacuum pump (or the systems compressor) to pull a vacuum until no moisture or other vapor remains in the system. If the compressor is used for this procedure, but CANNOT produce a deep vacuum, which of the following would be the problem? A- bad TXV B- low refrigerant C- leaky suction valve D- leaky exhaus...

OK HVAC JOURNEYMAN TEST EXAM QUESTIONS WITH COMPLETE SOLUTIONS VERIFIED GRADED A+ A deep vacuum is an evacuation method in which a technician uses a vacuum pump (or the systems compressor) to pull a vacuum until no moisture or other vapor remains in the system. If the compressor is used for this procedure, but CANNOT produce a deep vacuum, which of the following would be the problem? A- bad TXV B- low refrigerant C- leaky suction valve D- leaky exhaust valve C- leaky suction valve What ...

HVAC JOURNEYMAN PREP TEST EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED LATEST UPDATE A listed smoke damper designed to resist the passage of smoke shall be provided at each point in a duct or air transfer opening penetrates a: (A)smoke barrier wall (B)fire rated wall (C)interior wall (D)corridor wall Corridor wall (IMC 607.5.4) Flexible air duct may be what length? (A)10' (B)2' (C)14' (D)6' 14' (IMC 603.6.1.1) The maximum vertical distance between the front lower lip...

HVAC JOURNEYMAN TEST EXAMS QUESTIONS WITH COMPLETE SOLUTIONS VERIFIED 2024 Which type of air-conditioning system is most likely to leak refrigerant into a structure? A.direct B.indirect C.evaporative D.split. A.direct When mechanical equipment is located on a flat roof that is 8 foot above grade, how far from the roof edge must the equipment be located before a guard rail is not needed? A. Less than 6' B. 9' C. 4' D. More than 10' D. More than 10' A room that measures 10 x 20 x 8 conta...

KY HVAC JOURNEYMAN EXAM QUESTIONS WITH COMPLETE VERIFIED SOLUTIONS GRADED A+ Liquid adhesive coatings used on air filters for air conditioning or heating systems shall have a flash point not lower than _______ : a: 200°F b: 250°F c: 350°F d: 325°F d: 325°F Refer: IMC Code 605.1 Connectors shall connect to a chimney flue at a point not less than ______ above the lowest portion of the interior of the chimney flue: a: 10 inches b: 12 inches c: 16 inches d: 14 inches b: 12 inches ...

HVAC JOURNEYMAN TEST EXAM QUESTIONS WITH COMPLETE SOLUTIONS VERIFIED 100% GUARANTEED PASS Sensible Heat Heat that can be Measured Specific Heat The Amount of Heat Required to Raise 1 LB of a Substance 1*F Latent Heat Heat used to cause change of state. BTU amount of heat required to raise 1LB of water 1*F One Ton of Refrigeration 2000 x 144 x 24,288,000 Btu/24hours, and 12,000 Btu/hr A Room Thermostat Should be Mounted 5 feet from the floor To Provide Proper Oil Return to the Comp...