CDC 3E151 - HVAC/R JOURNEYMAN VOLUME 1
EXAM QUESTIONS AND ANSWERS 100%
SOLVED (Newest 2025) (001) When using a halide leak detector, the bluish flame turning green indicates - Correct Answers ✅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 - Correct Answers ✅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? - Correct Answers ✅The gauge assembly reads inches of mercury and is not accurate when pulling deep vacuums (002) While taking a reading with an infrared thermometer, what happens as you get further from the object being measured? - Correct Answers ✅The reading becomes more inaccurate (003) What part of the combustion analyzer gets placed into the stack? - Correct Answers ✅The probe (003) What transfers flue gases from the boiler stack to the indicator unit? - Correct Answers ✅A tube and hand bulb 1 / 2
CDC 3E151 - HVAC/R JOURNEYMAN VOLUME 1
EXAM QUESTIONS AND ANSWERS 100%
SOLVED (Newest 2025) (003) The special slide-rule calculator and CO2 indicator are used to determine - Correct Answers ✅combustion efficiency and stack loss (004) What will occur if you choose more than one conductor to measure when using a clamp on meter? - Correct Answers ✅Incorrect readings (004) A megohmmeter should never be used on a live circuit because - Correct Answers ✅it has its own power source and it will ruin the meter (004) A capacitance checker is used to test - Correct Answers ✅a capacitor (005) A photo tachometer is used to read the - Correct Answers ✅revolutions per minute (RPM) of a spinning motor shaft (005) When using a stroboscope, the frequency and reading is displayed for the technician when the object appears to be
- Correct Answers ✅standing still and the rpm of the
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equipment matches