RECF ELECTRICAL PRE-TEST WITH ALL CORRECT &
100% VERIFIED ANSWERS|UPDATED TO PASS
an exclusive OR (XOR) gate detects for when an input is true for one or the other, but not both. given the inputs
A and B, what is the correct Output sequence? ✔Correct Answer-C
what is the payback time on loft insulaion? ✔Correct Answer-4 years
what is the total resistance of the circuit? ✔Correct Answer-60 Ohms
a motor on a train converts 60000 J of electrical energy into 45000 J of kinetic energy. how much energy is
wasted? ✔Correct Answer-15 kJ
an OR gate detects when any input is true. given the inputs A and B, what is the correct output sequence?
✔Correct Answer-4
flip flops are fundamental storage elements for digital electronics. is it true or false that its name refers to the
humans having flip flops as fundamental shoes? ✔Correct Answer-false
which method reduces energy loss by the smallest amount? ✔Correct Answer-hot water tank jacket
how many kilowatt hours of electricity were used during the day? ✔Correct Answer-37
frequency is measured in: ✔Correct Answer-hertz
what is the current through the 50 resistor? ✔Correct Answer-0.2 A
an AND gate detects for when all inputs are true. given the inputs A and B, what is the correct output
sequence? ✔Correct Answer-2
which statement is true for this figure? ✔Correct Answer-output is true when input A is true and B is false
which circuit is digital? ✔Correct Answer-B
which method pays for itself in the shortest time? ✔Correct Answer-draught-proofing
an electric motor converts electrical energy into ______. ✔Correct Answer-mechanical energy
the change in potential energy of the water per second is 2000 J. the electrical energy output is 72000 J per
minute. what is the calculated the efficiency of the device? ✔Correct Answer-60%
a potential difference of 1.5Vezists across the ends of copper wire 2.0 m long with uniform radius 0.40 mm
✔Correct Answer-0.0676 ohms
on a certain day, 30 kilowatt hours of electricity were used. how many dollars would this electricity usage cost?
✔Correct Answer-$2.10
the change in potential energy of the water in a water wheel per second is 4000 J. the electrical energy output
is 2400 J per second. what is the calculated efficiency of the device? ✔Correct Answer-60%
a FIFO is a memory device that stores data in such a method such that data first in is the data first out. this is
likely most similar to which of the following? ✔Correct Answer-the checkout line at a grocery store
100% VERIFIED ANSWERS|UPDATED TO PASS
an exclusive OR (XOR) gate detects for when an input is true for one or the other, but not both. given the inputs
A and B, what is the correct Output sequence? ✔Correct Answer-C
what is the payback time on loft insulaion? ✔Correct Answer-4 years
what is the total resistance of the circuit? ✔Correct Answer-60 Ohms
a motor on a train converts 60000 J of electrical energy into 45000 J of kinetic energy. how much energy is
wasted? ✔Correct Answer-15 kJ
an OR gate detects when any input is true. given the inputs A and B, what is the correct output sequence?
✔Correct Answer-4
flip flops are fundamental storage elements for digital electronics. is it true or false that its name refers to the
humans having flip flops as fundamental shoes? ✔Correct Answer-false
which method reduces energy loss by the smallest amount? ✔Correct Answer-hot water tank jacket
how many kilowatt hours of electricity were used during the day? ✔Correct Answer-37
frequency is measured in: ✔Correct Answer-hertz
what is the current through the 50 resistor? ✔Correct Answer-0.2 A
an AND gate detects for when all inputs are true. given the inputs A and B, what is the correct output
sequence? ✔Correct Answer-2
which statement is true for this figure? ✔Correct Answer-output is true when input A is true and B is false
which circuit is digital? ✔Correct Answer-B
which method pays for itself in the shortest time? ✔Correct Answer-draught-proofing
an electric motor converts electrical energy into ______. ✔Correct Answer-mechanical energy
the change in potential energy of the water per second is 2000 J. the electrical energy output is 72000 J per
minute. what is the calculated the efficiency of the device? ✔Correct Answer-60%
a potential difference of 1.5Vezists across the ends of copper wire 2.0 m long with uniform radius 0.40 mm
✔Correct Answer-0.0676 ohms
on a certain day, 30 kilowatt hours of electricity were used. how many dollars would this electricity usage cost?
✔Correct Answer-$2.10
the change in potential energy of the water in a water wheel per second is 4000 J. the electrical energy output
is 2400 J per second. what is the calculated efficiency of the device? ✔Correct Answer-60%
a FIFO is a memory device that stores data in such a method such that data first in is the data first out. this is
likely most similar to which of the following? ✔Correct Answer-the checkout line at a grocery store
