HVAC electrical midterm Exam
Questions With Complete Solutions
/. Energy - Answer-electricity is a form of__
/.Converted and energy - Answer-Electricity can be__into another form of__
/.Energy - Answer-Heat, magnetism, light, motion, and pressure are all forms of___
/.Higher and lower - Answer-Energy moves from a place where there is___ energy to a
place where there is ____ energy
/.Electron - Answer-are the particles that orbit the core of an atom.
/.Free - Answer-Conductors are materials that have many ____electrons
/.EMF (electromotive force) - Answer-_____ is the force that pushes free electrons
through
conductors.
/.Potential difference and electrical pressure - Answer-List two terms that mean EMF
1.______
2.______
/.The volt - Answer-What is the unit of measurement of EMF. ___
/.Voltage source - Answer-What device used to generate electricity is called a
/.1) Battery, 2) Generator, 3) Solar Cell, 4) Thermocouple, - Answer-Name for DC
voltage sources
/.1) Alternator, 2) Transformer Secondary - Answer-Name two AC voltage sources
/.No - Answer-Is voltage current
/.free elections - Answer-Electric current is_____ _________ moving through a
conductor
/.The ampere - Answer-What is the unit of measurement for current flow?
/.Amount - Answer-Amperage tells the ______ of electron moving through a conductor
, /.Ammeter - Answer-What device used to check amperage ? The______
/.Heat,magnetism - Answer-_____&____ are produces when current flow through a
circuit
/.Path - Answer-A conductors provides a _____ for current flow
/.Continuity - Answer-A circuit with a complete path for a current is said to have___
/.No - Answer-Does an open switch have continuity?
/.Yes - Answer-Does a wire have continuity?
/.1) Alternating Current, 2) Direct Current - Answer-Name 2 types of current flow.
/.Alternating Current - Answer-______reverses direction at regular intervals.
/.cycle - Answer-Current alternates (reverses direction) two times every______
/.second, Hertz (Hz) - Answer-AC in the USA flows at 60 cycles per____which means
the same as 60____
/.120 - Answer-60 Hz AC changes direction_____ time a second
/.Resistance - Answer-_______is the opposition to current flow.
/.Amount - Answer-Resistance reduces the_____of electrons flowing through a circuit.
/.Low - Answer-Amperage will be high through a circuit that has____resistance.
/.Ohm - Answer-The unit of measurement for Resistance is the____
/.1) pure (or resistive), 2) reactive - Answer-Name 2 types of resistance.
/.Reactive - Answer-Back E.M.F. (BEMF) is a type of_____resistance.
/.magnetism - Answer-Back E.M.F. (BEMF) is produced by____in motion.
/.AC, inductive - Answer-Back E.M.F. (BEMF) only happens in__circuits with
an____load____
/.1) material, 2) length, 3) girth, 4) temperature, 5) magnetism in motion - Answer-Name
5 factors that affect the resistance of a device.
/.Infinite - Answer-The resistance of an open circuit will be____ohms
Questions With Complete Solutions
/. Energy - Answer-electricity is a form of__
/.Converted and energy - Answer-Electricity can be__into another form of__
/.Energy - Answer-Heat, magnetism, light, motion, and pressure are all forms of___
/.Higher and lower - Answer-Energy moves from a place where there is___ energy to a
place where there is ____ energy
/.Electron - Answer-are the particles that orbit the core of an atom.
/.Free - Answer-Conductors are materials that have many ____electrons
/.EMF (electromotive force) - Answer-_____ is the force that pushes free electrons
through
conductors.
/.Potential difference and electrical pressure - Answer-List two terms that mean EMF
1.______
2.______
/.The volt - Answer-What is the unit of measurement of EMF. ___
/.Voltage source - Answer-What device used to generate electricity is called a
/.1) Battery, 2) Generator, 3) Solar Cell, 4) Thermocouple, - Answer-Name for DC
voltage sources
/.1) Alternator, 2) Transformer Secondary - Answer-Name two AC voltage sources
/.No - Answer-Is voltage current
/.free elections - Answer-Electric current is_____ _________ moving through a
conductor
/.The ampere - Answer-What is the unit of measurement for current flow?
/.Amount - Answer-Amperage tells the ______ of electron moving through a conductor
, /.Ammeter - Answer-What device used to check amperage ? The______
/.Heat,magnetism - Answer-_____&____ are produces when current flow through a
circuit
/.Path - Answer-A conductors provides a _____ for current flow
/.Continuity - Answer-A circuit with a complete path for a current is said to have___
/.No - Answer-Does an open switch have continuity?
/.Yes - Answer-Does a wire have continuity?
/.1) Alternating Current, 2) Direct Current - Answer-Name 2 types of current flow.
/.Alternating Current - Answer-______reverses direction at regular intervals.
/.cycle - Answer-Current alternates (reverses direction) two times every______
/.second, Hertz (Hz) - Answer-AC in the USA flows at 60 cycles per____which means
the same as 60____
/.120 - Answer-60 Hz AC changes direction_____ time a second
/.Resistance - Answer-_______is the opposition to current flow.
/.Amount - Answer-Resistance reduces the_____of electrons flowing through a circuit.
/.Low - Answer-Amperage will be high through a circuit that has____resistance.
/.Ohm - Answer-The unit of measurement for Resistance is the____
/.1) pure (or resistive), 2) reactive - Answer-Name 2 types of resistance.
/.Reactive - Answer-Back E.M.F. (BEMF) is a type of_____resistance.
/.magnetism - Answer-Back E.M.F. (BEMF) is produced by____in motion.
/.AC, inductive - Answer-Back E.M.F. (BEMF) only happens in__circuits with
an____load____
/.1) material, 2) length, 3) girth, 4) temperature, 5) magnetism in motion - Answer-Name
5 factors that affect the resistance of a device.
/.Infinite - Answer-The resistance of an open circuit will be____ohms
