NEIEP 600 Final Exam Review: Questions &
Answers(Solved)
Refer to figure, If load resistance R2 is reduced by half, what happens to the zener
diode? - ANSWERZener current will decrease
Refer to the figure, the zener diode is designed to breakdown at 6VDC. What is the
voltage drop across resistor 1, with a constant DC supply of 10 VDC? - ANSWER4V
An elevators motor rotates at 1200 rpm at contract speed and is geared at a ratio of
40:1. If the motor turns 40 rpm the sheave turns 1 rpm. What is the actual speed of
the drive sheave in rpms? - ANSWER30 rpm
Refer to the figure, for the comparator circuit shown, what will happen to the output
if the non inverting input goes more positive than the inverting input? - ANSWERThe
output will go to zero.
Refer to the figure, for the inverting op amp shown, what is the output voltage? -
ANSWER25 mv
Which term defines the limit of magnetic strength around an inductor even though
the current through the coil increases? - ANSWERSaturation
Which of the follow describes how an SCR is turned off? - ANSWERVoltage is
removed from anode to cathode
On the fourteen pin DIP IC shown in figure 4 what is the location of pin 14? -
ANSWERTop right
The photodiode will conduct current when it detects? - ANSWERLight
What does the circuit in figure 5 represent? - ANSWERA relay timer
A string of temporary lighting has fifteen 100 watt light bulbs. A 15 amp breaker is
the max size that can be used with the 14 gauge wire used in this 120 volt circuit.
What is the current? - ANSWER12.5 A
If a circuit has three inductors in parallel of 10, 15 and 20 henries, what is the total
inductance? - ANSWER4.61 Henries
What does the symbol in figure 6 represent? - ANSWERLED
Which of the following statements is correct when testing transistors? - ANSWERA .7
drop from base to emitter is an indication of a good junction
What does the symbol shown below represent? - ANSWERAn SCR
Answers(Solved)
Refer to figure, If load resistance R2 is reduced by half, what happens to the zener
diode? - ANSWERZener current will decrease
Refer to the figure, the zener diode is designed to breakdown at 6VDC. What is the
voltage drop across resistor 1, with a constant DC supply of 10 VDC? - ANSWER4V
An elevators motor rotates at 1200 rpm at contract speed and is geared at a ratio of
40:1. If the motor turns 40 rpm the sheave turns 1 rpm. What is the actual speed of
the drive sheave in rpms? - ANSWER30 rpm
Refer to the figure, for the comparator circuit shown, what will happen to the output
if the non inverting input goes more positive than the inverting input? - ANSWERThe
output will go to zero.
Refer to the figure, for the inverting op amp shown, what is the output voltage? -
ANSWER25 mv
Which term defines the limit of magnetic strength around an inductor even though
the current through the coil increases? - ANSWERSaturation
Which of the follow describes how an SCR is turned off? - ANSWERVoltage is
removed from anode to cathode
On the fourteen pin DIP IC shown in figure 4 what is the location of pin 14? -
ANSWERTop right
The photodiode will conduct current when it detects? - ANSWERLight
What does the circuit in figure 5 represent? - ANSWERA relay timer
A string of temporary lighting has fifteen 100 watt light bulbs. A 15 amp breaker is
the max size that can be used with the 14 gauge wire used in this 120 volt circuit.
What is the current? - ANSWER12.5 A
If a circuit has three inductors in parallel of 10, 15 and 20 henries, what is the total
inductance? - ANSWER4.61 Henries
What does the symbol in figure 6 represent? - ANSWERLED
Which of the following statements is correct when testing transistors? - ANSWERA .7
drop from base to emitter is an indication of a good junction
What does the symbol shown below represent? - ANSWERAn SCR
