CDC 3E151

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 ...

CDC 3E151 - HVAC/R JOURNEYMAN VOLUME 1 EXAM QUESTIONS WITH COMPLETE SOLUTIONS GRADED A+ (001) When using a halide leak detector, the bluish flame turning green indicates a refrigerant leak (001) On a manifold gauge assembly, the vacuum hose is 3/8 inch and the other hoses are 1/4 inch because larger sizes allow for fewer restrictions which makes it easier and quicker to pull a vacuum (001) Why should the manifold gauge assembly not be used when measuring a vacuum? The gauge assembly read...