NEIEP 600 FINAL EXAM QUESTIONS &
ANSWERS 100% CORRECT
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? - correct answer ✔✔The output will
go to zero.
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? - correct answer ✔✔4V
Refer to figure, If load resistance R2 is reduced by half, what happens to the zener diode? -
correct answer ✔✔Zener current will decrease
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? - correct answer ✔✔30 rpm
Refer to the figure, for the inverting op amp shown, what is the output voltage? - correct
answer ✔✔25 mv
Which term defines the limit of magnetic strength around an inductor even though the current
through the coil increases? - correct answer ✔✔Saturation
Which of the follow describes how an SCR is turned off? - correct 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? - correct answer
✔✔Top right
A brake coil has an inductance off 4 Henries - correct answer ✔✔
The photodiode will conduct current when it detects? - correct answer ✔✔Light
What does the circuit in figure 5 represent? - correct answer ✔✔A 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? -
correct answer ✔✔12.5 A
If a circuit has three inductors in parallel of 10, 15 and 20 henries, what is the total inductance?
- correct answer ✔✔4.61 Henries
What does the symbol in figure 6 represent? - correct answer ✔✔LED
Which of the following statements is correct when testing transistors? - correct answer ✔✔A .7
drop from base to emitter is an indication of a good junction
What does the symbol shown below represent? - correct answer ✔✔An SCR
What is the length of time required to charge. 500 microfarad capacitor in series with a 10k ohm
resistor to the max applied voltage of 125 VDC? - correct answer ✔✔5 Seconds.
500microfaradsX10kohmX5
Which of the following is correct bout collector current of a transistor? - correct answer ✔✔It is
nearly equal to the emitter current
ANSWERS 100% CORRECT
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? - correct answer ✔✔The output will
go to zero.
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? - correct answer ✔✔4V
Refer to figure, If load resistance R2 is reduced by half, what happens to the zener diode? -
correct answer ✔✔Zener current will decrease
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? - correct answer ✔✔30 rpm
Refer to the figure, for the inverting op amp shown, what is the output voltage? - correct
answer ✔✔25 mv
Which term defines the limit of magnetic strength around an inductor even though the current
through the coil increases? - correct answer ✔✔Saturation
Which of the follow describes how an SCR is turned off? - correct 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? - correct answer
✔✔Top right
A brake coil has an inductance off 4 Henries - correct answer ✔✔
The photodiode will conduct current when it detects? - correct answer ✔✔Light
What does the circuit in figure 5 represent? - correct answer ✔✔A 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? -
correct answer ✔✔12.5 A
If a circuit has three inductors in parallel of 10, 15 and 20 henries, what is the total inductance?
- correct answer ✔✔4.61 Henries
What does the symbol in figure 6 represent? - correct answer ✔✔LED
Which of the following statements is correct when testing transistors? - correct answer ✔✔A .7
drop from base to emitter is an indication of a good junction
What does the symbol shown below represent? - correct answer ✔✔An SCR
What is the length of time required to charge. 500 microfarad capacitor in series with a 10k ohm
resistor to the max applied voltage of 125 VDC? - correct answer ✔✔5 Seconds.
500microfaradsX10kohmX5
Which of the following is correct bout collector current of a transistor? - correct answer ✔✔It is
nearly equal to the emitter current
