NYC Health + Hospitals Electronics
Technician Examination Practice Exam
2026 | 100 Questions & Answers with
Detailed Rationales | Complete Exam
Prep & Study Guide
1. What is the primary function of a resistor in an electronic circuit?
A. Store electrical energy
B. Limit or control current
C. Amplify voltage
D. Convert AC to mechanical energy
Answer: Limit or control current
Rationale: A resistor opposes the flow of electric current and is commonly used
to control current, divide voltage, and establish operating conditions for other
components.
2. Which unit is used to measure electrical resistance?
A. Volt
B. Ampere
C. Watt
D. Ohm
,Answer: Ohm
Rationale: Electrical resistance is measured in ohms (Ω), named after physicist
Georg Ohm.
3. What instrument is normally used to measure voltage?
A. Ammeter
B. Oscilloscope
C. Voltmeter
D. Frequency counter
Answer: Voltmeter
Rationale: A voltmeter measures electrical potential difference between two
points in a circuit.
4. How should an ammeter generally be connected when measuring current
through a load?
A. In parallel
B. Across the power supply
C. In series
D. Across the resistor
Answer: In series
Rationale: Current must flow through the ammeter, so the meter is connected in
series with the circuit path being measured.
5. What is the relationship described by Ohm’s law?
A. P = VI
B. V = IR
C. I = PR
D. R = VP
Answer: V = IR
Rationale: Ohm’s law states that voltage equals current multiplied by
resistance.
, 6. What is the SI unit of electrical current?
A. Volt
B. Ohm
C. Watt
D. Ampere
Answer: Ampere
Rationale: Current is measured in amperes (A), commonly called amps.
7. Which component is designed primarily to store electrical energy in an
electric field?
A. Resistor
B. Transformer
C. Capacitor
D. Fuse
Answer: Capacitor
Rationale: A capacitor stores energy in an electric field between its conductive
plates.
8. Which component stores energy in a magnetic field?
A. Capacitor
B. Inductor
C. Diode
D. Resistor
Answer: Inductor
Rationale: An inductor stores energy in the magnetic field created by current
flowing through its winding.
9. What is the main purpose of a fuse?
A. Increase voltage
B. Regulate frequency
, C. Protect a circuit from excessive current
D. Amplify signals
Answer: Protect a circuit from excessive current
Rationale: A fuse opens the circuit when current exceeds its rated value, helping
prevent wiring and equipment damage.
10.Which semiconductor device primarily allows current to flow in one
direction?
A. Transistor
B. Capacitor
C. Diode
D. Transformer
Answer: Diode
Rationale: A conventional diode conducts primarily in the forward direction and
blocks current in reverse bias within its rated limits.
11.What type of diode is commonly used for voltage regulation?
A. Photodiode
B. LED
C. Zener diode
D. Varactor only
Answer: Zener diode
Rationale: A Zener diode is designed to operate in reverse breakdown and can
maintain a relatively stable voltage over a specified operating range.
12.What does LED stand for?
A. Low Energy Device
B. Light-Emitting Diode
C. Linear Electronic Driver
D. Light Electrical Detector
Answer: Light-Emitting Diode
Technician Examination Practice Exam
2026 | 100 Questions & Answers with
Detailed Rationales | Complete Exam
Prep & Study Guide
1. What is the primary function of a resistor in an electronic circuit?
A. Store electrical energy
B. Limit or control current
C. Amplify voltage
D. Convert AC to mechanical energy
Answer: Limit or control current
Rationale: A resistor opposes the flow of electric current and is commonly used
to control current, divide voltage, and establish operating conditions for other
components.
2. Which unit is used to measure electrical resistance?
A. Volt
B. Ampere
C. Watt
D. Ohm
,Answer: Ohm
Rationale: Electrical resistance is measured in ohms (Ω), named after physicist
Georg Ohm.
3. What instrument is normally used to measure voltage?
A. Ammeter
B. Oscilloscope
C. Voltmeter
D. Frequency counter
Answer: Voltmeter
Rationale: A voltmeter measures electrical potential difference between two
points in a circuit.
4. How should an ammeter generally be connected when measuring current
through a load?
A. In parallel
B. Across the power supply
C. In series
D. Across the resistor
Answer: In series
Rationale: Current must flow through the ammeter, so the meter is connected in
series with the circuit path being measured.
5. What is the relationship described by Ohm’s law?
A. P = VI
B. V = IR
C. I = PR
D. R = VP
Answer: V = IR
Rationale: Ohm’s law states that voltage equals current multiplied by
resistance.
, 6. What is the SI unit of electrical current?
A. Volt
B. Ohm
C. Watt
D. Ampere
Answer: Ampere
Rationale: Current is measured in amperes (A), commonly called amps.
7. Which component is designed primarily to store electrical energy in an
electric field?
A. Resistor
B. Transformer
C. Capacitor
D. Fuse
Answer: Capacitor
Rationale: A capacitor stores energy in an electric field between its conductive
plates.
8. Which component stores energy in a magnetic field?
A. Capacitor
B. Inductor
C. Diode
D. Resistor
Answer: Inductor
Rationale: An inductor stores energy in the magnetic field created by current
flowing through its winding.
9. What is the main purpose of a fuse?
A. Increase voltage
B. Regulate frequency
, C. Protect a circuit from excessive current
D. Amplify signals
Answer: Protect a circuit from excessive current
Rationale: A fuse opens the circuit when current exceeds its rated value, helping
prevent wiring and equipment damage.
10.Which semiconductor device primarily allows current to flow in one
direction?
A. Transistor
B. Capacitor
C. Diode
D. Transformer
Answer: Diode
Rationale: A conventional diode conducts primarily in the forward direction and
blocks current in reverse bias within its rated limits.
11.What type of diode is commonly used for voltage regulation?
A. Photodiode
B. LED
C. Zener diode
D. Varactor only
Answer: Zener diode
Rationale: A Zener diode is designed to operate in reverse breakdown and can
maintain a relatively stable voltage over a specified operating range.
12.What does LED stand for?
A. Low Energy Device
B. Light-Emitting Diode
C. Linear Electronic Driver
D. Light Electrical Detector
Answer: Light-Emitting Diode
