Neiep 600 Final Exam Review 2023
Zener current will decrease
Refer to figure 1. If the load resistance R2 is reduced by half what happens what happens to zener diode?
4v
Refer to figure 1. The zener diode is designed to breakdown at 6VDC what is the voltage drop across R1 with a constant DC...
Zener current will decrease
Refer to figure 1. If the load resistance R2 is reduced by half what happens what
happens to zener diode?
4v
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
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
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
Refer to figure 3. For the inverting op amp shown, what is the output voltage?
Saturation
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
Which of the following describes how an SCR is turned OFF?
Top right
On the fourteen pin DIP IC shown in figure 4 what is the location of pin 14
1507 ohms
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
The photodiode will conduct current when it detects
A relay timer
, What does the circuit in figure 5 represent?
12.5 A
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
If a circuit has three inductors in parallel of 10, 15, and 20 henries, what is the total
inductance?
LED
What does the symbol in figure 6 represent?
A .7V drop from base-to-emitter is an indication of a good junction
Which of the following statements is correct when testing transistors?
An SCR
What does the symbol shown below represent?
5 seconds
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
Which of the following is correct about collector current of a transistor?
4400 pounds
The entire cab assembly, including the car sling, cab doors, operator, etc., weighs 3400
lbs. The capacity of the elevator is 2500 lbs. The car must be counterweighted at 40%
of capacity plus the weight of the car assembly. What is the weight of the counterweight
assembly?
The ability to resist changes in current flow
What is the most important property an inductor possesses?
Placing two capacitors in series decreases the capacitance.
Which statement is correct regarding capacitors?
Dielectric
Which of the following factors determines the voltage rating of a capacitor?
A resistor is placed in series with the capacitor
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