Esco exam Pack Questions and Verified Answers | Passed | A+

What is current flow? : D.The flow of electrons in a circuit What is impedance? : A.Opposition to alternating current Like charges will : B.Repel each other Any material that will readily release electrons is called: : B.A conductor The symbol for current is: : B. I 2 Electricity can prod...

1. An air-to-air heat pump has many of the same components as an air conditioning system. The major difference is that a heat pump also has a (an); : C: reversing valve. 2. What is the difference between "demand defrost" and "timed defrost?" : D: demand defrost only happens when needed, and...

What is current flow? : D.The flow of electrons in a circuit What is impedance? : A.Opposition to alternating current Like charges will : B.Repel each other Any material that will readily release electrons is called: : B.A conductor The symbol for current is: : B. I 2 Electricity can prod...

Heat which causes a change in temperature of a substance is called : Sensible heat Heat added to a substance without a rise in temperature : Latent heat Heat added to the refrigerant in a vapor state after the evaporation process is called : Superheat Scroll compressor move refrigerant by : I...

1. A gas furnace is to be installed in a garage. The burners and ignition sources must be located ______ above the floor. A: 6 inches B: 12 inches C: 18 inches D: 24 inches : C: 18 inches 2. A good description of how hi-metai fan switch operates the blower motor on a gas furnace is: A: te...

A gas furnace to be installed in a garage. The national standards requires that the burners and ignition must be located ____ above the floor: : 18 inches A good description of how a bi-metal fan switch operates the blower motor on a gas furnace is: : Temperature on/ Temperature off Redundan...

An air-to-air heat pump has many of the same components as an air conditioning system. The major difference is that a heat pump also has an : Reversing valve What is the difference between "demand defrost" and "timed defrost"? : Demand defrost happens only when needed and timed defrost is b...

Heat which causes a change in temperature of a substance is called : Sensible Heat Heat added to a substance without a rise in temperature is called : Latent Heat Heat added to refrigerant in a vapor state after the evaporation process is called : Superheat A scroll compressor moved refrigeran...

Heat which is added to a vapor after the change of state occurs is called : superheat A refrigerant gives up heat when; : it condenses it is desirable for refrigerant in the suction line to be slightly superheated in order to... : ensure liquid refrigerant does not enter the compressor state o...