NEIEP 600 FINAL REVIEW QUESTIONS
AND ANSWERS 100% CORRECT!!
, 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
AND ANSWERS 100% CORRECT!!
, 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
