Hvac accurate - Study guides, Class notes & Summaries

How many types of HVAC certifications are there? - Accurate AnswerThere are 4 types. What does a metering device do? - Accurate AnswerThe metering device causes a reduction in pressure, and therefore a reduction in saturation temperature. What is absorbed in the evaporator? - Accurate AnswerHeat is absorbed in the evaporator. What happens in the evaporator? - Accurate AnswerHeat is absorbed in the evaporator and causes the refrigerant to boil from liquid to vapor. At the outlet of th...

HVAC Final Exam Electrical For Air Conditioning Accurate 100%(Graded A+) When using a low voltage T-stat for heating and cooling, when would there be a jumper between Rh and Rc? Select one: a. When using a single transformer system b. When heating with an oil boiler c. When heating with a gas boiler d. When using a two transformer system - ANSWER A) When Using a single transformer system Digital thermostats usually display temperature, time of day, programming and operating status. Sel...

HVAC TEST EXAM 2024 WITH 100% ACCURATE SOLUTIONS You are the refrigeration engineer running a 2000 - ton centrifugal refrigeration system. The system supplies chilled water to a college campus with multiple buildings. You have normal chilled water load about 1800 tons when the refrigeration system suddenly stops and shuts down. The panel display on the refrigeration system indicates that the problem is with the water flow. of the following, which immediate action would be best? - correct answ...

HVAC BOMA 501 Exam Questions With Accurate Answers. Dual Duct System - answerA system in which hot air and cold air are supplied by separate ducts and mixed at each controlled space to provide the desired supply air temperature. This method consumes a great deal of energy. Muiltizone System - answeran a/c system in which the zone control is obtained by mixing hot and cold air at the unit in response to a room thermostat Load Calulations - answertake the sensible heat and the latent heat i...

BOMA-HVAC Exam Questions With Accurate Answers. laminar flow - answer- A streamline or viscous flow. - layers of water flowing over one another at different speeds with virtually no mixing between layers. - Fluid particles move in definite and observable paths or stream lines. - The flow is characteristic of viscous (thick) fluid or is one in which viscosity of the fluid plays a significant part. turbulent flow - answerIrregular movement of particles of the fluid. What do you use to det...

Hvac Journeyman Exam Accurate Questions & Defects on gas piping or fittings shall be _____.(A) repaired(B) replaced or repaired and retested(C) repaired by a certified welder(D) ignored, as the operating pressure is much less than the air test. - ANSWER B. Fitting shall be replaced or repaired and retested. UMC Section 1316.4.3 Every absorption refrigerating system supported from the ground shall rest on a concrete slab extending not less than _____ the adjoining ground level.(A) 3 inches bel...

The inspector is not required to determine ____ ___ of any system or component. - Answer- -Years of age -Life expectancy -Make model Horizontal waste pipe should slope ____ inch per foot - Answer- 1/4" per foot if < 3 inch pipe. 1/8" per foot if > or = to 3 inch pipe Drip screed - Answer- Also called weep screed. Used at the base/bottom of stucco walls to release moisture. Pressure Vacuum Breaker (PVB) - Answer- Used for Backflow Prevention. Lawn Irrigation systems: install...

HVAC CERTIFICATION EXAM 2024 WITH 100% ACCURATE SOLUTIONS Propane and Butane are _______ than air: - correct answer Heavier What will be the resistance in the circuit if the supply voltage is 30V and current flowing through the circuit is 5A - correct answer 6 ohms Temperature at which oil starts to produce a waxy substance that may interfere with the refrigeration system - correct answer Floc point What manifold gauge set is used to charge, evacuate, add oil and recover refrigeran...

The weight of water vapor in a given amount of air (Grains per cubic foot) - Answer-Absolute Humidity Pressure measured with a base of zero - Answer-Absolute Pressure A temperature scale using absolute zero as a reference - Rankin or Kelvin Scale (may be measures in degrees C or F) - Answer-Absolute Temperature Theoretical temperature at which all molecular activity ceases = -273.16 C or -456.69 F - AnswerAbsolute Zero By approximately how much (%) does a start capacitor increase motor tor...