CFESA ELECTRICAL EXAM WITH COMPLETE QUESTIONS AND CORRECT VERIFIED
ANSWERS(DETAILED ANSWERS) ALREADY GRADED A+ 100% GUARANTEED TO PASS
CONCEPTS!!!
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
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
,CFESA ELECTRICAL EXAM WITH COMPLETE QUESTIONS AND CORRECT VERIFIED
ANSWERS(DETAILED ANSWERS) ALREADY GRADED A+ 100% GUARANTEED TO PASS
CONCEPTS!!!
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
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
,CFESA ELECTRICAL EXAM WITH COMPLETE QUESTIONS AND CORRECT VERIFIED
ANSWERS(DETAILED ANSWERS) ALREADY GRADED A+ 100% GUARANTEED TO PASS
CONCEPTS!!!
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
draw a diagram of a 230 volt grounded delta power supply. label all of the voltages and the wild leg -
(answer)
what is the wild leg? - (answer)leg with higher than 120v to ground or neutral
what danger is the wild leg? - (answer)high voltage that will damage 120v component in the circuit
what is the voltage between either of the non wild leg hot lines and neutral in a 230 volt grounded delta
system? - (answer)115v
how do you determine which hot line is the wild leg in a 250 volt grounded delta power supply? -
(answer)the one that does not measure 120 volts to neutral or ground
what danger is there when replacing a three phase circuit breaker in a 230 volt grounded delta power
supply? - (answer)crossing the hot lines and supplying the wild leg to the wrong terminal in the unit.
Why is a "WYE" power supply so versatile - (answer)can get 120v and 208v as well as single and three
phase
What is the voltage between any two hot lines in a 208 volt WYE power supply? - (answer)208v
, CFESA ELECTRICAL EXAM WITH COMPLETE QUESTIONS AND CORRECT VERIFIED
ANSWERS(DETAILED ANSWERS) ALREADY GRADED A+ 100% GUARANTEED TO PASS
CONCEPTS!!!
What is the voltage between any hot line and neutral or ground in a 208 volt WYE power supply? -
(answer)120v
What is the voltage from any hot line to ground or neutral, on a 480 volt WYE power supply? -
(answer)277v
if you had a commercial building and you had a three phase supply to your building how many different
incoming power supplies would you need if the incoming three phase supply was three phase delta? -
(answer)2
if you had a commercial building and you had a three phase supply to your building, how many different
incoming power supplies would you need if the incoming three phase supply was three phase grounded
delta? - (answer)1
if you had a commercial building and you had a three phase supply to your building how many different
incoming power supplies would you need if the incoming three phase supply was three phase WYE
208v? - (answer)1
approximately how much will the wattage increase on a 208v piece of equipment if it is connected to
240v supply? - (answer)33%
approximately how much will the rated wattage decrease if a 240v unit is connected to a 208v power
supply? - (answer)25%
what damage could potentially be caused to the supply wiring if 208v unit is connected to a 240v
supply? - (answer)higher wattage created will damage heaters or other components
how can the cooking characteristics of equipment be changed by a low supply voltage? - (answer)slow
recovery time, uneven cooking
ANSWERS(DETAILED ANSWERS) ALREADY GRADED A+ 100% GUARANTEED TO PASS
CONCEPTS!!!
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
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
,CFESA ELECTRICAL EXAM WITH COMPLETE QUESTIONS AND CORRECT VERIFIED
ANSWERS(DETAILED ANSWERS) ALREADY GRADED A+ 100% GUARANTEED TO PASS
CONCEPTS!!!
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
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
,CFESA ELECTRICAL EXAM WITH COMPLETE QUESTIONS AND CORRECT VERIFIED
ANSWERS(DETAILED ANSWERS) ALREADY GRADED A+ 100% GUARANTEED TO PASS
CONCEPTS!!!
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
draw a diagram of a 230 volt grounded delta power supply. label all of the voltages and the wild leg -
(answer)
what is the wild leg? - (answer)leg with higher than 120v to ground or neutral
what danger is the wild leg? - (answer)high voltage that will damage 120v component in the circuit
what is the voltage between either of the non wild leg hot lines and neutral in a 230 volt grounded delta
system? - (answer)115v
how do you determine which hot line is the wild leg in a 250 volt grounded delta power supply? -
(answer)the one that does not measure 120 volts to neutral or ground
what danger is there when replacing a three phase circuit breaker in a 230 volt grounded delta power
supply? - (answer)crossing the hot lines and supplying the wild leg to the wrong terminal in the unit.
Why is a "WYE" power supply so versatile - (answer)can get 120v and 208v as well as single and three
phase
What is the voltage between any two hot lines in a 208 volt WYE power supply? - (answer)208v
, CFESA ELECTRICAL EXAM WITH COMPLETE QUESTIONS AND CORRECT VERIFIED
ANSWERS(DETAILED ANSWERS) ALREADY GRADED A+ 100% GUARANTEED TO PASS
CONCEPTS!!!
What is the voltage between any hot line and neutral or ground in a 208 volt WYE power supply? -
(answer)120v
What is the voltage from any hot line to ground or neutral, on a 480 volt WYE power supply? -
(answer)277v
if you had a commercial building and you had a three phase supply to your building how many different
incoming power supplies would you need if the incoming three phase supply was three phase delta? -
(answer)2
if you had a commercial building and you had a three phase supply to your building, how many different
incoming power supplies would you need if the incoming three phase supply was three phase grounded
delta? - (answer)1
if you had a commercial building and you had a three phase supply to your building how many different
incoming power supplies would you need if the incoming three phase supply was three phase WYE
208v? - (answer)1
approximately how much will the wattage increase on a 208v piece of equipment if it is connected to
240v supply? - (answer)33%
approximately how much will the rated wattage decrease if a 240v unit is connected to a 208v power
supply? - (answer)25%
what damage could potentially be caused to the supply wiring if 208v unit is connected to a 240v
supply? - (answer)higher wattage created will damage heaters or other components
how can the cooking characteristics of equipment be changed by a low supply voltage? - (answer)slow
recovery time, uneven cooking
