NEIEP 600 FINAL REVIEW FINAL PAPER 2026
TESTED QUESTIONS WITH FULL SOLUTION
GRADED A+
◉ A diode is reverse biased when: Answer: Cathode is positive
relative to anode | Anode positive | Conducting | Shorted
◉ The purpose of a diode is to: Answer: Allow current in one
direction | Amplify | Store charge | Regulate
◉ A half-wave rectifier output is: Answer: One half of AC cycle | Both
halves | Flat DC | Noise
◉ A bridge rectifier uses: Answer: Four diodes | Two diodes | One
diode | No diodes
◉ Ripple voltage is: Answer: AC variation on DC | Pure DC | Peak
voltage | Noise only
◉ Increasing filter capacitance will: Answer: Reduce ripple |
Increase ripple | Stop current | Reverse polarity
, ◉ A power supply converts: Answer: AC to DC | DC to AC | Voltage to
frequency | Frequency to voltage
◉ A transformer is used to: Answer: Change voltage level | Rectify |
Filter | Regulate
◉ Filtering is used to: Answer: Reduce ripple | Increase ripple |
Regulate voltage | Rectify
◉ A Zener diode is used for: Answer: Voltage regulation |
Rectification | Amplification | Switching
◉ A Zener operates in: Answer: Reverse breakdown | Forward bias |
Cutoff | Saturation
◉ If a Zener fails open, output voltage will: Answer: Rise toward
input | Drop to zero | Stay regulated | Oscillate
◉ SCR stands for: Answer: Silicon Controlled Rectifier | Solid
Current Regulator | Silicon Current Relay | Switching Control
Rectifier
◉ An SCR conducts when: Answer: Gate is triggered and forward
biased | Reverse biased | Gate removed | AC removed
TESTED QUESTIONS WITH FULL SOLUTION
GRADED A+
◉ A diode is reverse biased when: Answer: Cathode is positive
relative to anode | Anode positive | Conducting | Shorted
◉ The purpose of a diode is to: Answer: Allow current in one
direction | Amplify | Store charge | Regulate
◉ A half-wave rectifier output is: Answer: One half of AC cycle | Both
halves | Flat DC | Noise
◉ A bridge rectifier uses: Answer: Four diodes | Two diodes | One
diode | No diodes
◉ Ripple voltage is: Answer: AC variation on DC | Pure DC | Peak
voltage | Noise only
◉ Increasing filter capacitance will: Answer: Reduce ripple |
Increase ripple | Stop current | Reverse polarity
, ◉ A power supply converts: Answer: AC to DC | DC to AC | Voltage to
frequency | Frequency to voltage
◉ A transformer is used to: Answer: Change voltage level | Rectify |
Filter | Regulate
◉ Filtering is used to: Answer: Reduce ripple | Increase ripple |
Regulate voltage | Rectify
◉ A Zener diode is used for: Answer: Voltage regulation |
Rectification | Amplification | Switching
◉ A Zener operates in: Answer: Reverse breakdown | Forward bias |
Cutoff | Saturation
◉ If a Zener fails open, output voltage will: Answer: Rise toward
input | Drop to zero | Stay regulated | Oscillate
◉ SCR stands for: Answer: Silicon Controlled Rectifier | Solid
Current Regulator | Silicon Current Relay | Switching Control
Rectifier
◉ An SCR conducts when: Answer: Gate is triggered and forward
biased | Reverse biased | Gate removed | AC removed
