Hvac

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 ...

CDC 3E151 - HVAC/R JOURNEYMAN VOLUME 2 EXAM QUESTIONS AND ANSWERS WITH COMPLETE 100% VERIFIED SOLUTIONS (201) What affect will dust on fan blades have on heat transfer? It will reduce heat transfer (201) Where do you view the rotation and discharge of a centrifugal fan? On the drive side (201) Why are vanes used in the vane axial fan? To straighten out the spiraling motion of the air (201) What will allow a sheave to be used on different diameter shafts? Bushings (201) Where will the cl...

CDC 3E151 - HVAC/R JOURNEYMAN VOLUME 3 EXAM QUESTIONS AND VERIFIED ANSWERS LATEST UPDATE (401) What relationship between magnetic field and conductors is required to generate voltage mechanically? Relative motion between the two (401) Nickel and chromium alloys are used in heater elements because they make it possible to operate the elements at high temperatures without melting (401) What effect does the length of a wire have on the amount of pressure needed to force the electrons to the ...

CDC 3E151 - HVAC/R JOURNEYMAN VOLUME 4 EXAM QUESTIONS WITH COMPLETE SOLUTIONS VERIFIED GRADED A+ (601) How is static electricity best controlled? Grounding, bonding, humidifying (601) Grounded wires carrying off static charges neutralizes the difference in electrical potential (601) A fuel spill should be reported when how many gallons or more is leaked or spilled? 25 (601) A leak of 35 gallons should be reported to the state regulator within 24 hours (602) When the viscosity of an ...

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...

HVAC JOURNEYMAN TEST EXAM QUESTIONS WITH COMPLETE SOLUTIONS VERIFIED GRADED A+ 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...

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 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 ...