600 Final Review Neiep Exam questions
With Detaied Solutions Scored A+
Zener current will decrease - CORRECT ANSWER-Refer to figure 1. If the load
resistance R2 is reduced by half what happens what happens to zener diode?
4v - CORRECT ANSWER-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
30 rpm - CORRECT ANSWER-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?
The output will go to zero - CORRECT ANSWER-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?
-20 mv - CORRECT ANSWER-Refer to figure 3. For the inverting op amp shown, what
is the output voltage?
Saturation - CORRECT ANSWER-Which term defines the limit of magnetic strength
around an inductor even though the current through the coil increases
Voltage is removed from anode to cathode - CORRECT ANSWER-Which of the
following describes how an SCR is turned OFF?
Top right - CORRECT ANSWER-On the fourteen pin DIP IC shown in figure 4 what is
the location of pin 14
, 1507 ohms - CORRECT ANSWER-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:
light - CORRECT ANSWER-The photodiode will conduct current when it detects
A relay timer - CORRECT ANSWER-What does the circuit in figure 5 represent?
12.5 A - CORRECT ANSWER-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?
4.61 henries - CORRECT ANSWER-If a circuit has three inductors in parallel of 10, 15,
and 20 henries, what is the total inductance?
LED - CORRECT ANSWER-What does the symbol in figure 6 represent?
A .7V drop from base-to-emitter is an indication of a good junction - CORRECT
ANSWER-Which of the following statements is correct when testing transistors?
An SCR - CORRECT ANSWER-What does the symbol shown below represent?
5 seconds - CORRECT ANSWER-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)
It is nearly equal to the emitter current - CORRECT ANSWER-Which of the following is
correct about collector current of a transistor?
With Detaied Solutions Scored A+
Zener current will decrease - CORRECT ANSWER-Refer to figure 1. If the load
resistance R2 is reduced by half what happens what happens to zener diode?
4v - CORRECT ANSWER-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
30 rpm - CORRECT ANSWER-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?
The output will go to zero - CORRECT ANSWER-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?
-20 mv - CORRECT ANSWER-Refer to figure 3. For the inverting op amp shown, what
is the output voltage?
Saturation - CORRECT ANSWER-Which term defines the limit of magnetic strength
around an inductor even though the current through the coil increases
Voltage is removed from anode to cathode - CORRECT ANSWER-Which of the
following describes how an SCR is turned OFF?
Top right - CORRECT ANSWER-On the fourteen pin DIP IC shown in figure 4 what is
the location of pin 14
, 1507 ohms - CORRECT ANSWER-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:
light - CORRECT ANSWER-The photodiode will conduct current when it detects
A relay timer - CORRECT ANSWER-What does the circuit in figure 5 represent?
12.5 A - CORRECT ANSWER-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?
4.61 henries - CORRECT ANSWER-If a circuit has three inductors in parallel of 10, 15,
and 20 henries, what is the total inductance?
LED - CORRECT ANSWER-What does the symbol in figure 6 represent?
A .7V drop from base-to-emitter is an indication of a good junction - CORRECT
ANSWER-Which of the following statements is correct when testing transistors?
An SCR - CORRECT ANSWER-What does the symbol shown below represent?
5 seconds - CORRECT ANSWER-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)
It is nearly equal to the emitter current - CORRECT ANSWER-Which of the following is
correct about collector current of a transistor?
