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CFESA ELECTRICAL FINAL EXAM AND PRACTICE
EXAM QUESTIONS 2025 NEWEST COMPLETE EXAM
QUESTIONS WITH DETAILED VERIFIED ANSWERS
(100% CORRECT ANSWERS) /ALREADY GRADED A+/
LATEST EXAM!!!
What do the following prefixes mean?
Micro,Kilo,Mega,Milli - Answer-1/1,000,000, 1000,
1,000,000, 1/1000
If you know the wattage and voltage, how do you
determine the current? - Answer-Divide the wattage by the
voltage
If you know the voltage and current how do you determine
the wattage? - Answer-Multiply voltage times current
If a circuit is supplied with 100 volts and the total
resistance of the circuit is 200 ohms, how much current
will the circuit draw? - Answer-.5 amps
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If a piece of equipment is supplied 208 volts and the amp
meter clamped to the hot line reads 20 amps, what is the
wattage of the load? - Answer-4160 Watts
How much voltage is in one hot line? - Answer-None
What happens to current in a parallel circuit? - Answer-It
divides across resistances
what happens to voltage across the loads in a parallel
circuit? - Answer-stays the same
what happens to the voltage across the loads in a series
circuit? - Answer-it divides across the resistances
what happens to the current in a series circuit? - Answer-It
stays the same everywhere
in a parallel circuit the total resistance of the circuit will
always be less than what resistance? - Answer-the
smallest resistance
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how do you find the total resistance of a series circuit? -
Answer-add the resistances together
how do you find the total resistance of a parallel circuit? -
Answer-1/RT = 1/R1 + 1/R2 + 1/R3 ...
If a circuit is wired parallel, and the supply voltage is 120
volts, each load must be rated at what voltage? - Answer-
120 volts
if a circuit has two elements wired in series, and each is
rated at 120 volts, what voltage must be supplied to the
circuit in order for the elements to heat at full power? -
Answer-240 volts
What is the advantage of using higher voltages? - Answer-
Lower Current and wire size
Is there a negative and positive line in AC power supplies?
- Answer-No
What is the voltage between two hot lines in a 230-volt
system? - Answer-230V
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What is the voltage between two hot lines in a 208-volt
system? - Answer-208V
What is the voltage between a hot line and a neutral in a
230-volt single phase supply? - Answer-115V
What is the voltage between a hot line and a neutral in a
208-volt single phase supply? - Answer-120V
What is the accepted maximum voltage difference
between the name plate voltage and the supplied voltage?
- Answer-+ or - 10%
What is the voltage between any two hot lines of a 230
volt delta power supply? - Answer-230V
what is the voltage between a hot line and ground on a
240 volt delta power supply - Answer-No usable voltage
what is the voltage between any two hot lines of a 230 volt
grounded delta power supply - Answer-230V
CFESA ELECTRICAL FINAL EXAM AND PRACTICE
EXAM QUESTIONS 2025 NEWEST COMPLETE EXAM
QUESTIONS WITH DETAILED VERIFIED ANSWERS
(100% CORRECT ANSWERS) /ALREADY GRADED A+/
LATEST EXAM!!!
What do the following prefixes mean?
Micro,Kilo,Mega,Milli - Answer-1/1,000,000, 1000,
1,000,000, 1/1000
If you know the wattage and voltage, how do you
determine the current? - Answer-Divide the wattage by the
voltage
If you know the voltage and current how do you determine
the wattage? - Answer-Multiply voltage times current
If a circuit is supplied with 100 volts and the total
resistance of the circuit is 200 ohms, how much current
will the circuit draw? - Answer-.5 amps
,2|Page
If a piece of equipment is supplied 208 volts and the amp
meter clamped to the hot line reads 20 amps, what is the
wattage of the load? - Answer-4160 Watts
How much voltage is in one hot line? - Answer-None
What happens to current in a parallel circuit? - Answer-It
divides across resistances
what happens to voltage across the loads in a parallel
circuit? - Answer-stays the same
what happens to the voltage across the loads in a series
circuit? - Answer-it divides across the resistances
what happens to the current in a series circuit? - Answer-It
stays the same everywhere
in a parallel circuit the total resistance of the circuit will
always be less than what resistance? - Answer-the
smallest resistance
,3|Page
how do you find the total resistance of a series circuit? -
Answer-add the resistances together
how do you find the total resistance of a parallel circuit? -
Answer-1/RT = 1/R1 + 1/R2 + 1/R3 ...
If a circuit is wired parallel, and the supply voltage is 120
volts, each load must be rated at what voltage? - Answer-
120 volts
if a circuit has two elements wired in series, and each is
rated at 120 volts, what voltage must be supplied to the
circuit in order for the elements to heat at full power? -
Answer-240 volts
What is the advantage of using higher voltages? - Answer-
Lower Current and wire size
Is there a negative and positive line in AC power supplies?
- Answer-No
What is the voltage between two hot lines in a 230-volt
system? - Answer-230V
, 4|Page
What is the voltage between two hot lines in a 208-volt
system? - Answer-208V
What is the voltage between a hot line and a neutral in a
230-volt single phase supply? - Answer-115V
What is the voltage between a hot line and a neutral in a
208-volt single phase supply? - Answer-120V
What is the accepted maximum voltage difference
between the name plate voltage and the supplied voltage?
- Answer-+ or - 10%
What is the voltage between any two hot lines of a 230
volt delta power supply? - Answer-230V
what is the voltage between a hot line and ground on a
240 volt delta power supply - Answer-No usable voltage
what is the voltage between any two hot lines of a 230 volt
grounded delta power supply - Answer-230V
