CFESA ELECTRICAL EXAM WITH CORRECT
ACTUAL QUESTIONS AND CORRECTLY
WELL DEFINED ANSWERS LATEST 2025
ALREADY GRADED A+
If you did find a solid state level control with two probes, what does the second
probe indicate? - ANSWERS-Low water cut off
If a solid state liquid level control has no terminal on the board indicated for a
ground wire where will it obtain its ground connection - ANSWERS-From the
mounting screw connections
What effect will de-ionized water have on the operation of a liquid level control
system? - ANSWERS-Overflow, current will not flow through water
,In order to get enough spring tension developed to operate a spring wound
timer at lower time settings what must you do? - ANSWERS-Turn the knob past
a certain point indicated on the timer
How accurate are spring wound timers? - ANSWERS-Not very accurate
Is the accuracy of a spring wound timer adequate for all the applications where
they are used? - ANSWERS-NO
How accurate are motor driven timers considered to be? - ANSWERS-Very
accurate
What is special about the electric motor used on motor driven timers? -
ANSWERS-Synchronous motors, constant speed
Are the cams on motor driven timers adjustable? - ANSWERS-Usually
What are the disadvantages of motor driven timers? - ANSWERS-Expensive
How much voltage is in one hot line? - ANSWERS-None
What happens to current in a parallel circuit? - ANSWERS-It divides across
resistances
,what happens to voltage across the loads in a parallel circuit? - ANSWERS-stays
the same
what happens to the voltage across the loads in a series circuit? - ANSWERS-it
divides across the resistances
what happens to the current in a series circuit? - ANSWERS-It stays the same
everywhere
in a parallel circuit the total resistance of the circuit will always be less than
what resistance? - ANSWERS-the smallest resistance
how do you find the total resistance of a series circuit? - ANSWERS-add the
resistances together
how do you find the total resistance of a parallel circuit? - ANSWERS-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? - ANSWERS-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? - ANSWERS-240 volts
, What is the advantage of using higher voltages? - ANSWERS-Lower Current and
wire size
Is there a negative and positive line in AC power supplies? - ANSWERS-No
What is the voltage between two hot lines in a 230-volt system? - ANSWERS-
230V
What is the voltage between two hot lines in a 208-volt system? - ANSWERS-
208V
What do the following prefixes mean? Micro,Kilo,Mega,Milli - ANSWERS-
1/1,000,000, 1000, 1,000,000, 1/1000
If you know the wattage and voltage, how do you determine the current? -
ANSWERS-Divide the wattage by the voltage
If you know the voltage and current how do you determine the wattage? -
ANSWERS-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? - ANSWERS-.5 amps
ACTUAL QUESTIONS AND CORRECTLY
WELL DEFINED ANSWERS LATEST 2025
ALREADY GRADED A+
If you did find a solid state level control with two probes, what does the second
probe indicate? - ANSWERS-Low water cut off
If a solid state liquid level control has no terminal on the board indicated for a
ground wire where will it obtain its ground connection - ANSWERS-From the
mounting screw connections
What effect will de-ionized water have on the operation of a liquid level control
system? - ANSWERS-Overflow, current will not flow through water
,In order to get enough spring tension developed to operate a spring wound
timer at lower time settings what must you do? - ANSWERS-Turn the knob past
a certain point indicated on the timer
How accurate are spring wound timers? - ANSWERS-Not very accurate
Is the accuracy of a spring wound timer adequate for all the applications where
they are used? - ANSWERS-NO
How accurate are motor driven timers considered to be? - ANSWERS-Very
accurate
What is special about the electric motor used on motor driven timers? -
ANSWERS-Synchronous motors, constant speed
Are the cams on motor driven timers adjustable? - ANSWERS-Usually
What are the disadvantages of motor driven timers? - ANSWERS-Expensive
How much voltage is in one hot line? - ANSWERS-None
What happens to current in a parallel circuit? - ANSWERS-It divides across
resistances
,what happens to voltage across the loads in a parallel circuit? - ANSWERS-stays
the same
what happens to the voltage across the loads in a series circuit? - ANSWERS-it
divides across the resistances
what happens to the current in a series circuit? - ANSWERS-It stays the same
everywhere
in a parallel circuit the total resistance of the circuit will always be less than
what resistance? - ANSWERS-the smallest resistance
how do you find the total resistance of a series circuit? - ANSWERS-add the
resistances together
how do you find the total resistance of a parallel circuit? - ANSWERS-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? - ANSWERS-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? - ANSWERS-240 volts
, What is the advantage of using higher voltages? - ANSWERS-Lower Current and
wire size
Is there a negative and positive line in AC power supplies? - ANSWERS-No
What is the voltage between two hot lines in a 230-volt system? - ANSWERS-
230V
What is the voltage between two hot lines in a 208-volt system? - ANSWERS-
208V
What do the following prefixes mean? Micro,Kilo,Mega,Milli - ANSWERS-
1/1,000,000, 1000, 1,000,000, 1/1000
If you know the wattage and voltage, how do you determine the current? -
ANSWERS-Divide the wattage by the voltage
If you know the voltage and current how do you determine the wattage? -
ANSWERS-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? - ANSWERS-.5 amps
