NCATT AET & AEIT Endorsement
National Center for Aerospace &
Transportation Technologies (NCATT)
2026/2027 Academic Year
Practice Questions & Correct
Answers Plus Rationales
Latest 2026 PDF
THIS DOCUMENT CONTAINS:
✓ Practice Questions & Correct Answers 2026/27
✓ Verified Correct Answers & Rationales
✓ Instant Pdf Download
,1
Section I: Basic Electricity & Electronics (Questions 1-20)
1. What part of an atom is associated with the flow of
electricity?
a) Protons
b) Neutrons
c) Electrons
d) Nucleus
Correct Answer: c — Electrons are the negatively charged
subatomic particles that orbit the nucleus of an atom. The flow of
electrons through a conductor constitutes an electric current .
2. The flow of electrons through a conductor is called:
a) Voltage
b) Amperage (Current)
c) Resistance
d) Inductance
Correct Answer: b — Amperes, or amps, represent the quantity
of electrons flowing past a point in a circuit per second. Voltage is
electrical pressure; resistance opposes current flow .
3. The basic unit of electrical pressure is the:
a) Ampere
b) Coulomb
c) Ohm
d) Volt
,2
Correct Answer: d — Voltage is the unit of electromotive force
(EMF) or electrical pressure that pushes electrons through a
circuit. Amperes measure rate of flow, ohms measure resistance,
and coulombs measure electrical quantity .
4. What is the name for 6.28 × 10¹⁸ electrons?
a) An ampere
b) A joule
c) A coulomb
d) A watt
Correct Answer: c — A coulomb is a basic unit of electrical
quantity, defined as the charge carried by approximately 6.28
billion billion (6.28 × 10¹⁸) electrons .
5. According to Ohm's Law, if voltage increases while
resistance remains constant, current will:
a) Decrease
b) Increase
c) Remain the same
d) Stop flowing
Correct Answer: b — Ohm's Law states that I = V/R. If V increases
while R remains constant, current must increase proportionally .
6. Direct current (DC) is defined as:
a) The flow of electrons that periodically reverses direction
b) The flow of electrons in one direction with constant polarity
, 3
c) Current that only flows in AC circuits
d) The flow of protons through a conductor
Correct Answer: b — Direct current flows in one direction
throughout a circuit with constant voltage and current. AC
periodically reverses direction and changes polarity .
7. What is the unit of measurement for electrical resistance?
a) Volt
b) Ampere
c) Ohm
d) Farad
Correct Answer: c — The ohm is the SI unit of electrical
resistance, representing opposition to current flow .
8. What is the primary advantage of fiber optic cables over
copper cables in aircraft systems?
a) Lower cost
b) Immunity to electromagnetic interference (EMI)
c) Easier installation
d) Higher resistance to physical damage
Correct Answer: b — Fiber optic cables transmit data using light
pulses rather than electrical signals, making them immune to
electromagnetic interference and crosstalk .
9. A "short circuit" occurs when:
a) A circuit is open and no current flows
National Center for Aerospace &
Transportation Technologies (NCATT)
2026/2027 Academic Year
Practice Questions & Correct
Answers Plus Rationales
Latest 2026 PDF
THIS DOCUMENT CONTAINS:
✓ Practice Questions & Correct Answers 2026/27
✓ Verified Correct Answers & Rationales
✓ Instant Pdf Download
,1
Section I: Basic Electricity & Electronics (Questions 1-20)
1. What part of an atom is associated with the flow of
electricity?
a) Protons
b) Neutrons
c) Electrons
d) Nucleus
Correct Answer: c — Electrons are the negatively charged
subatomic particles that orbit the nucleus of an atom. The flow of
electrons through a conductor constitutes an electric current .
2. The flow of electrons through a conductor is called:
a) Voltage
b) Amperage (Current)
c) Resistance
d) Inductance
Correct Answer: b — Amperes, or amps, represent the quantity
of electrons flowing past a point in a circuit per second. Voltage is
electrical pressure; resistance opposes current flow .
3. The basic unit of electrical pressure is the:
a) Ampere
b) Coulomb
c) Ohm
d) Volt
,2
Correct Answer: d — Voltage is the unit of electromotive force
(EMF) or electrical pressure that pushes electrons through a
circuit. Amperes measure rate of flow, ohms measure resistance,
and coulombs measure electrical quantity .
4. What is the name for 6.28 × 10¹⁸ electrons?
a) An ampere
b) A joule
c) A coulomb
d) A watt
Correct Answer: c — A coulomb is a basic unit of electrical
quantity, defined as the charge carried by approximately 6.28
billion billion (6.28 × 10¹⁸) electrons .
5. According to Ohm's Law, if voltage increases while
resistance remains constant, current will:
a) Decrease
b) Increase
c) Remain the same
d) Stop flowing
Correct Answer: b — Ohm's Law states that I = V/R. If V increases
while R remains constant, current must increase proportionally .
6. Direct current (DC) is defined as:
a) The flow of electrons that periodically reverses direction
b) The flow of electrons in one direction with constant polarity
, 3
c) Current that only flows in AC circuits
d) The flow of protons through a conductor
Correct Answer: b — Direct current flows in one direction
throughout a circuit with constant voltage and current. AC
periodically reverses direction and changes polarity .
7. What is the unit of measurement for electrical resistance?
a) Volt
b) Ampere
c) Ohm
d) Farad
Correct Answer: c — The ohm is the SI unit of electrical
resistance, representing opposition to current flow .
8. What is the primary advantage of fiber optic cables over
copper cables in aircraft systems?
a) Lower cost
b) Immunity to electromagnetic interference (EMI)
c) Easier installation
d) Higher resistance to physical damage
Correct Answer: b — Fiber optic cables transmit data using light
pulses rather than electrical signals, making them immune to
electromagnetic interference and crosstalk .
9. A "short circuit" occurs when:
a) A circuit is open and no current flows
