NEIEP 600 Final Exam Version 2 (Latest 2024 /
2025 Update) Questions and Verified Answers |
Refer to figure, If load resistance R2 is reduced by half, what happens to the zener
diode? - ACCURATE- Zener current will decrease
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? - ACCURATE-
4V
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? - ACCURATE- 30 rpm
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? - ACCURATE- The
output will go to zero.
Refer to the figure, for the inverting op amp shown, what is the output voltage? -
ACCURATE- 25 mv
Which term defines the limit of magnetic strength around an inductor even though the
current through the coil increases? - ACCURATE- Saturation
Which of the follow describes how an SCR is turned off? - ACCURATE-Voltage is
removed from anode to cathode
On the fourteen pin DIP IC shown in figure 4 what is the location of pin 14? -
ACCURATE- Top right
A brake coil has an inductance off 4 Henries - ACCURATE-
The photodiode will conduct current when it detects? - ACCURATE- Light
What does the circuit in figure 5 represent? - ACCURATE- 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? - ACCURATE- 12.5 A
This study source was downloaded by 100000888206670 from CourseHero.com on 08-11-2024 07:07:34 GMT -05:00
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, If a circuit has three inductors in parallel of 10, 15 and 20 henries, what is the total
inductance? - ACCURATE- 4.61 Henries
What does the symbol in figure 6 represent? - ACCURATE- LED
Which of the following statements is correct when testing transistors? - ACCURATE- A
.7 drop from base to emitter is an indication of a good junction
What does the symbol shown below represent? - ACCURATE- 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? - ACCURATE- 5 Seconds.
500microfaradsX10kohmX5
Which of the following is correct bout collector current of a transistor? - ACCURATE- It
is nearly equal to the emitter current
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 the capacity plus the weigh of the car assembly. What is the weight of the
counterweight assembly? - ACCURATE- 4400 lbs
What is the most important property an inductor possesses? - ACCURATE-The ability
to resist changes in current flow
Which statement is correct regarding capacitors? - ACCURATE- Placing twocaptors in
parallel increases its voltage capacity
Which of the following factors determines the voltage rating of a capacitor? -
ACCURATE- Dielectric
What is usually done to protect large capacitors during charging? - ACCURATE- A
resistors placed in series with the capacitor.
An MOV placed around a relay coil for voltage spike suppression has shorted. What
would the effects be? - ACCURATE- Spike suppression would be lost
Which of the following do you need to be aware of when using electrolytic capacitors? -
ACCURATE- They may be polarity sensitive
Refer to figure, What inputs are necessary to get a low (0) on the output? -
ACCURATE- A low (0) on input A and B
Why are bleeder resistors sometimes connected across high voltage capacitors? -
ACCURATE- To help drain voltage when power is removed
This study source was downloaded by 100000888206670 from CourseHero.com on 08-11-2024 07:07:34 GMT -05:00
https://www.coursehero.com/file/232112378/11docx/
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