NCCER Electrical Level 1 Certification Exam
Practice Questions And Correct Answers
(Verified Answers) Plus Rationales 2026 Q&A |
Instant Download Pdf
1. Which of the following is the unit of electrical current?
a) Volt
b) Ohm
c) Ampere
d) Watt
The ampere is the standard unit of electrical current, measuring the
flow of electric charge.
2. Ohm’s Law states that:
a) Voltage = Current × Power
b) Resistance = Voltage × Current
c) Voltage = Current × Resistance
d) Power = Voltage × Resistance
Ohm’s Law defines the relationship between voltage, current, and
resistance.
3. The formula for electrical power is:
a) Power = Voltage × Resistance
b) Power = Voltage × Current
c) Power = Current ÷ Resistance
d) Power = Voltage ÷ Current
,Electrical power in a circuit is the product of voltage and current.
4. Which color is typically used for a grounding conductor?
a) Red
b) Black
c) Green
d) White
Green is the standard color for grounding conductors to ensure safety.
5. In a series circuit, the current:
a) Varies across each component
b) Is the same through all components
c) Increases at each resistor
d) Decreases at each resistor
Series circuits have one path, so current remains constant throughout.
6. Which type of circuit allows current to flow in more than one
path?
a) Series
b) Parallel
c) Open
d) Short
Parallel circuits provide multiple paths for current to flow.
7. A short circuit occurs when:
a) Resistance is too high
b) Voltage drops to zero
c) A low-resistance path bypasses the normal load
d) Current is zero
, A short circuit allows excessive current to flow due to a bypassed load.
8. What is the main purpose of a fuse?
a) Increase current
b) Decrease voltage
c) Protect a circuit from overcurrent
d) Store electrical energy
Fuses interrupt current flow when it exceeds safe levels to prevent
damage.
9. The term “AC” stands for:
a) Alternating Charge
b) Active Current
c) Alternating Current
d) Applied Circuit
AC stands for alternating current, which periodically reverses direction.
10. The term “DC” stands for:
a) Dual Current
b) Alternating Current
c) Direct Current
d) Distributed Circuit
DC flows in one direction only, unlike AC.
11. Which of the following materials is the best conductor of
electricity?
a) Plastic
b) Rubber
c) Glass
d) Copper
Practice Questions And Correct Answers
(Verified Answers) Plus Rationales 2026 Q&A |
Instant Download Pdf
1. Which of the following is the unit of electrical current?
a) Volt
b) Ohm
c) Ampere
d) Watt
The ampere is the standard unit of electrical current, measuring the
flow of electric charge.
2. Ohm’s Law states that:
a) Voltage = Current × Power
b) Resistance = Voltage × Current
c) Voltage = Current × Resistance
d) Power = Voltage × Resistance
Ohm’s Law defines the relationship between voltage, current, and
resistance.
3. The formula for electrical power is:
a) Power = Voltage × Resistance
b) Power = Voltage × Current
c) Power = Current ÷ Resistance
d) Power = Voltage ÷ Current
,Electrical power in a circuit is the product of voltage and current.
4. Which color is typically used for a grounding conductor?
a) Red
b) Black
c) Green
d) White
Green is the standard color for grounding conductors to ensure safety.
5. In a series circuit, the current:
a) Varies across each component
b) Is the same through all components
c) Increases at each resistor
d) Decreases at each resistor
Series circuits have one path, so current remains constant throughout.
6. Which type of circuit allows current to flow in more than one
path?
a) Series
b) Parallel
c) Open
d) Short
Parallel circuits provide multiple paths for current to flow.
7. A short circuit occurs when:
a) Resistance is too high
b) Voltage drops to zero
c) A low-resistance path bypasses the normal load
d) Current is zero
, A short circuit allows excessive current to flow due to a bypassed load.
8. What is the main purpose of a fuse?
a) Increase current
b) Decrease voltage
c) Protect a circuit from overcurrent
d) Store electrical energy
Fuses interrupt current flow when it exceeds safe levels to prevent
damage.
9. The term “AC” stands for:
a) Alternating Charge
b) Active Current
c) Alternating Current
d) Applied Circuit
AC stands for alternating current, which periodically reverses direction.
10. The term “DC” stands for:
a) Dual Current
b) Alternating Current
c) Direct Current
d) Distributed Circuit
DC flows in one direction only, unlike AC.
11. Which of the following materials is the best conductor of
electricity?
a) Plastic
b) Rubber
c) Glass
d) Copper
