Elevator Mechanic 600 Final/51 Questions
and Answers/ 100% Verified
Refer to figure, If load resistance R2 is reduced by half, what happens to
the zener diode? - -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? - -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? - -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? - -The output will go to zero.
-Refer to the figure, for the inverting op amp shown, what is the output
voltage? - -25 mv
-Which term defines the limit of magnetic strength around an inductor
even though the current through the coil increases? - -Saturation
-Which of the follow describes how an SCR is turned off? - -Voltage is
removed from anode to cathode
-On the fourteen pin DIP IC shown in figure 4 what is the location of pin
14? - -Top right
-A brake coil has an inductance off 4 Henries - -
-The photodiode will conduct current when it detects? - -Light
-What does the circuit in figure 5 represent? - -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? - -12.5 A
-If a circuit has three inductors in parallel of 10, 15 and 20 henries,
what is the total inductance? - -4.61 Henries
-What does the symbol in figure 6 represent? - -LED
-Which of the following statements is correct when testing transistors? -
-A .7 drop from base to emitter is an indication of a good junction
and Answers/ 100% Verified
Refer to figure, If load resistance R2 is reduced by half, what happens to
the zener diode? - -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? - -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? - -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? - -The output will go to zero.
-Refer to the figure, for the inverting op amp shown, what is the output
voltage? - -25 mv
-Which term defines the limit of magnetic strength around an inductor
even though the current through the coil increases? - -Saturation
-Which of the follow describes how an SCR is turned off? - -Voltage is
removed from anode to cathode
-On the fourteen pin DIP IC shown in figure 4 what is the location of pin
14? - -Top right
-A brake coil has an inductance off 4 Henries - -
-The photodiode will conduct current when it detects? - -Light
-What does the circuit in figure 5 represent? - -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? - -12.5 A
-If a circuit has three inductors in parallel of 10, 15 and 20 henries,
what is the total inductance? - -4.61 Henries
-What does the symbol in figure 6 represent? - -LED
-Which of the following statements is correct when testing transistors? -
-A .7 drop from base to emitter is an indication of a good junction
