HVAC EXAM PACKAGE DEAL (BUNDLE) WITH COMPLETE SOLUTIONS

When a water regulating valve is used to control the head pressure of a water-cooled system, the valve's spring is acting against which pressure to modulate the water flow? - ANSWER Head pressure of the system To prove that the combustion blower motor is operating before ignition, a ______ would...

A_____is the quantity of heat required to raise the temperature of I lb of water |°F. - ANSWER British thermal unit (BTU) Comfor is typically attained at normal cooling and heating temperatures with a relative humidity of about _____% - ANSWER 50% _________is the movement of air through distr...

1. Where is the heater core located? - ANSWER In the dash 2. In a system with no PTC heater, how is the coolant heated? - ANSWER the engine heats the coolant 3. How is current controlled in a PTC heater? - ANSWER The PTC is Self regulated resistence, Changes with heat and makes it shut off. ...

Two locations where a cold air return should be installed - ANSWER open area of a wall and low to the ground Which of the following is the law of thermodynamics? - ANSWER heat moves toward a place with lower intensity Sensible heat describes - ANSWER how hot something feels Latent heat is m...

To control ice build-up on a heat pump outdoor coil in the heating cycle, a ____ is attached to a large diaphragm. - ANSWER Microswitch The heater in the thermostat control circuit in the cooling mode is active when the - ANSWER Cooling contact is open If the suction pressure of a system is 60...

What is the function and operation of a reversing valve - ANSWER Reverses refrigerant flow and provides both heating and cooling. Diverts the discharge gas. What are common failures of reversing valves and causes - ANSWER Stuck valve Overheating Bad coil Leaking by from discharge gas flowing b...

Spiral wound gaskets are primarily used on - ANSWER high temperature high pressure systems lip type seals are used primarily - ANSWER on rotating shafts The side force applied at right angles to a bearing and shaft such as that applied from a pulley is called a - ANSWER radial load A type o...

An ampere is - ANSWER A measure of the quality of electrons flowing past a point in the electrical circuit in a given time What part of an atom moves from one atom to another? - ANSWER electron An element in an electric heating unit is applied to a 232-volt power supply. The current flow throu...

sustainability - ANSWER meeting energy needs of today's without detracting from ability of future generations to meet their needs global warming/climate change - ANSWER general rise in average annual global temperature ozone layer depletion - ANSWER loss of ozone molecules in atmosphere resul...

Heating - ANSWER The process of raising the temperature of a space Ventilation - ANSWER The exchange of air between and enclosed space and the outdoors. Air Conditioning - ANSWER The process of lowering the temperature and humidity of a space for human comfort. Refrigeration - ANSWER The ...

Furnace - ANSWER The air flow on most structures that use a fossil fuel for a heat source have a___that would be used as an air supply. Control loop - ANSWER Almost all control systems use a___to control the temperature with in a given structure, space, or zone. Troubleshooting - ANSWER A___ch...

Which unit contains a desiccant to remove moisture from the system? - ANSWER Receiver dryer and Accumulator In a piston type compressor, the pistons are driven by what? - ANSWER Swash plate, Crankshaft or Wobble plate (All of the Above) The basic design of compressors include what? - ANSWER Pi...

A load is an electrical device that _____________________________ - ANSWER uses electricity to do useful work A disconnect switch is used to __________ - ANSWER open and close the main power source to a piece of equipment which of the following are not components of a contactor or relay? - ANS...

A ___ reacts to stop, start, or modulate the flow of water, air, or refrigerant to the system or conditioned space - ANSWER Controlled device All control systems can be subdivided into ____, no matter how many controls there are. - ANSWER Control loops _______ control systems were used before ...

AC is an electron flow that _________________________ - ANSWER alternates back and fourth The ______ is often used as a graphical representation of alternating current - ANSWER sine wave when a conductor rotates through one complete revolution it has generated _____ flow reversals - ANSWER two...

Level 1 Final Review Correct 100%(GRADED A+)Level 1 Final Review Correct 100%(GRADED A+)Level 1 Final Review Correct 100%(GRADED A+)Level 1 Final Review Correct 100%(GRADED A+)Level 1 Final Review Correct 100%(GRADED A+)Level 1 Final Review Correct 100%(GRADED A+)Level 1 Final Review Correct 100%(GR...

The total heat content of infiltrated air of the same dry-bulb temperature may vary from one part of the country to another because of the difference in ___. a. solar load b. sensible heat c. humidity d. convection currents - ANSWER c. humidity A homeowner plans to build a house out i...

HVACR Journeyman Practice Exam Accurate 100%(RATED A+)HVACR Journeyman Practice Exam Accurate 100%(RATED A+)HVACR Journeyman Practice Exam Accurate 100%(RATED A+)HVACR Journeyman Practice Exam Accurate 100%(RATED A+)HVACR Journeyman Practice Exam Accurate 100%(RATED A+)HVACR Journeyman Practice Exam...

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 abs...

What is the symbol for impedance? a. R b. I c. Z d. P - ANSWER z The safety ground conductor for A/C circuit is usually color coded ________. a. red b. green c. black d. white - ANSWER Green Resistance is _______. a. amperage b. electrical pressure c. opposition to current flow d. ...

In a chiller, the refrigerant boils by ___________. - ANSWER absorbing heat from the water passing through it The four main components of a refrigeration system are - ANSWER compressor, condenser, evaporator, & metering device The difference between a contactor and a motor starter is: - ANSWER...

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 - ANSWER Corridor wall (IMC 607.5.4) Flexible air duct may be what length? (A)10...

Three tons of air conditioning is equal to how many BTUs? - ANSWER 36,000 The liquid line size is _______. - ANSWER 3/8" The discharge line should feel _____ to the touch. - ANSWER slightly warm The compressor should be on a level pad _____ inches above grade. - ANSWER 3 The electrical ...

Sensible Heat - ANSWER Heat that can be Measured Specific Heat - ANSWER The Amount of Heat Required to Raise 1 LB of a Substance 1*F Latent Heat - ANSWER Heat used to cause change of state. BTU - ANSWER amount of heat required to raise 1LB of water 1*F One Ton of Refrigeration - ANSWER 2...

True - ANSWER Copper wire bend easily, has good mechanical strength, resists corrosion, and can be easily joined. True - ANSWER Aluminum is a good conductor of electricity, however, it has a tendency to corrode. False - ANSWER Voltage drop in a conductor is of least importance when sizing wire...

Evaporator Coil - ANSWER What component of an air conditioning system absorbs heat into the refrigerant Ventilation - ANSWER What does the V stand for in HVAC? Hot Surface Ignition - ANSWER What type of ignition is utilized by the furnaces in the shop? Air Conditioning - ANSWER What is the ...