NEIEP 600 Final Review 2025 – Complete
Study Guide & Key Concepts
Refer to figure 1. If the load resistance R2 is reduced by half what happens what happens to zener
diode? - ANSWER ✔✨---Zener current will decrease
Refer to figure 1. The zener diode is designed to breakdown at 6VDC what is the voltage drop across R1
with a constant DC supply of 10VDC - ANSWER ✔✨---4v
An elevators motor rotates at 1200 rpm at contract speed and is geard 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? -
ANSWER ✔✨---30 rpm
Refer to figure 2. For the comparator circuit shown, what will happen to the output of the non-inverting
input goes more positive than the inverting input? - ANSWER ✔✨---The output will go to zero
Refer to figure 3. For the inverting op amp shown, what is the output voltage? - ANSWER ✔✨----20
mv
Which term defines the limit of magnetic strength around an inductor even though the current through
the coil increases - ANSWER ✔✨---Saturation
, Which of the following describes how an SCR is turned OFF? - ANSWER ✔✨---Voltage is removed
from anode to cathode
On the fourteen pin DIP IC shown in figure 4 what is the location of pin 14 - ANSWER ✔✨---Top
right
A brake coil has an inductance of 4 henries. If the coil was placed into a circuit with an operating
frequency of 60hz the coil would have a resistance of: - ANSWER ✔✨---1507 ohms
The photodiode will conduct current when it detects - ANSWER ✔✨---light
What does the circuit in figure 5 represent? - ANSWER ✔✨---A relay timer
A string of temporary lighting has fifteen 100 watt bulbs. A 15 amp breaker is the maximum size that can
be used with the 14 gauge wire used in this 120 volt circuit. What is the current? - ANSWER ✔✨---
12.5 A
If a circuit has three inductors in parallel of 10, 15, and 20 henries, what is the total inductance? -
ANSWER ✔✨---4.61 henries
What does the symbol in figure 6 represent? - ANSWER ✔✨---LED
Which of the following statements is correct when testing transweristors? - ANSWER ✔✨---A .7V
drop from base-to-emitter is an indication of a good junction
What does the symbol shown below represent? - ANSWER ✔✨---An SCR
What is the length of time required to charge a 500-microfarad capacitor in series with a 10K ohm
resistor to the maximum applied voltage of 125 VDC? (TC = R x C) - ANSWER ✔✨---5 seconds
Study Guide & Key Concepts
Refer to figure 1. If the load resistance R2 is reduced by half what happens what happens to zener
diode? - ANSWER ✔✨---Zener current will decrease
Refer to figure 1. The zener diode is designed to breakdown at 6VDC what is the voltage drop across R1
with a constant DC supply of 10VDC - ANSWER ✔✨---4v
An elevators motor rotates at 1200 rpm at contract speed and is geard 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? -
ANSWER ✔✨---30 rpm
Refer to figure 2. For the comparator circuit shown, what will happen to the output of the non-inverting
input goes more positive than the inverting input? - ANSWER ✔✨---The output will go to zero
Refer to figure 3. For the inverting op amp shown, what is the output voltage? - ANSWER ✔✨----20
mv
Which term defines the limit of magnetic strength around an inductor even though the current through
the coil increases - ANSWER ✔✨---Saturation
, Which of the following describes how an SCR is turned OFF? - ANSWER ✔✨---Voltage is removed
from anode to cathode
On the fourteen pin DIP IC shown in figure 4 what is the location of pin 14 - ANSWER ✔✨---Top
right
A brake coil has an inductance of 4 henries. If the coil was placed into a circuit with an operating
frequency of 60hz the coil would have a resistance of: - ANSWER ✔✨---1507 ohms
The photodiode will conduct current when it detects - ANSWER ✔✨---light
What does the circuit in figure 5 represent? - ANSWER ✔✨---A relay timer
A string of temporary lighting has fifteen 100 watt bulbs. A 15 amp breaker is the maximum size that can
be used with the 14 gauge wire used in this 120 volt circuit. What is the current? - ANSWER ✔✨---
12.5 A
If a circuit has three inductors in parallel of 10, 15, and 20 henries, what is the total inductance? -
ANSWER ✔✨---4.61 henries
What does the symbol in figure 6 represent? - ANSWER ✔✨---LED
Which of the following statements is correct when testing transweristors? - ANSWER ✔✨---A .7V
drop from base-to-emitter is an indication of a good junction
What does the symbol shown below represent? - ANSWER ✔✨---An SCR
What is the length of time required to charge a 500-microfarad capacitor in series with a 10K ohm
resistor to the maximum applied voltage of 125 VDC? (TC = R x C) - ANSWER ✔✨---5 seconds
