NICET Electrical Power Testing
Level I Practice Questions And
Correct Answers (Verified
Answers) Plus Rationale 2027
Q&A| Instant Download Pdf.
Section 1 — Electrical Fundamentals
1. What is the basic unit of electrical current?
A. Volt
B. Ohm
C. Ampere
D. Watt
Answer: C. Ampere
Current is measured in amperes (A), representing the rate of flow of
electric charge.
2. What instrument is commonly used to measure voltage?
A. Ammeter
B. Voltmeter
C. Wattmeter
D. Megohmmeter
Answer: B. Voltmeter
A voltmeter measures electrical potential difference between two
points.
,3. What is the unit of electrical resistance?
A. Volt
B. Ampere
C. Watt
D. Ohm
Answer: D. Ohm
Resistance is measured in ohms (Ω).
4. Which equation represents Ohm's law?
A. P = VI
B. V = IR
C. I = PR
D. R = VP
Answer: B. V = IR
Ohm's law states that voltage equals current multiplied by resistance.
5. A circuit has 120 V and 10 Ω resistance. What current flows?
A. 1 A
B. 10 A
C. 12 A
D. 120 A
Answer: C. 12 A
Using I = V/R, 120/10 = 12 A.
6. What is the primary function of a conductor?
A. Prevent current flow
B. Provide a path for current
C. Increase resistance
D. Store magnetic energy
Answer: B. Provide a path for current
,Conductors provide a relatively low-resistance path for electrical
current.
7. Which material is commonly used as an electrical conductor?
A. Copper
B. Glass
C. Rubber
D. Porcelain
Answer: A. Copper
Copper has high electrical conductivity and is widely used in electrical
systems.
8. What does insulation primarily do?
A. Increase current
B. Reduce voltage
C. Prevent unintended current flow
D. Increase frequency
Answer: C. Prevent unintended current flow
Electrical insulation separates energized conductors from people,
equipment, and other conductive paths.
9. Electrical power is measured in:
A. Ohms
B. Watts
C. Amperes
D. Coulombs
Answer: B. Watts
The watt is the SI unit of electrical power.
10. Which equation calculates DC electrical power?
, A. P = VI
B. P = V/I
C. P = R/I
D. P = I/V
Answer: A. P = VI
Electrical power equals voltage multiplied by current.
11. A 240-V load draws 5 A. Approximately how much power does
it consume?
A. 48 W
B. 245 W
C. 1,200 W
D. 12,000 W
Answer: C. 1,200 W
P = VI = 240 × 5 = 1,200 W.
12. What happens to current in a series circuit if resistance
increases while voltage remains constant?
A. Current increases
B. Current decreases
C. Current remains constant
D. Current becomes AC
Answer: B. Current decreases
Ohm's law shows that current decreases when resistance increases at
constant voltage.
13. In a parallel circuit, the voltage across each branch is generally:
A. Zero
B. Different in every branch
C. Equal to the source voltage
D. Twice the source voltage
Level I Practice Questions And
Correct Answers (Verified
Answers) Plus Rationale 2027
Q&A| Instant Download Pdf.
Section 1 — Electrical Fundamentals
1. What is the basic unit of electrical current?
A. Volt
B. Ohm
C. Ampere
D. Watt
Answer: C. Ampere
Current is measured in amperes (A), representing the rate of flow of
electric charge.
2. What instrument is commonly used to measure voltage?
A. Ammeter
B. Voltmeter
C. Wattmeter
D. Megohmmeter
Answer: B. Voltmeter
A voltmeter measures electrical potential difference between two
points.
,3. What is the unit of electrical resistance?
A. Volt
B. Ampere
C. Watt
D. Ohm
Answer: D. Ohm
Resistance is measured in ohms (Ω).
4. Which equation represents Ohm's law?
A. P = VI
B. V = IR
C. I = PR
D. R = VP
Answer: B. V = IR
Ohm's law states that voltage equals current multiplied by resistance.
5. A circuit has 120 V and 10 Ω resistance. What current flows?
A. 1 A
B. 10 A
C. 12 A
D. 120 A
Answer: C. 12 A
Using I = V/R, 120/10 = 12 A.
6. What is the primary function of a conductor?
A. Prevent current flow
B. Provide a path for current
C. Increase resistance
D. Store magnetic energy
Answer: B. Provide a path for current
,Conductors provide a relatively low-resistance path for electrical
current.
7. Which material is commonly used as an electrical conductor?
A. Copper
B. Glass
C. Rubber
D. Porcelain
Answer: A. Copper
Copper has high electrical conductivity and is widely used in electrical
systems.
8. What does insulation primarily do?
A. Increase current
B. Reduce voltage
C. Prevent unintended current flow
D. Increase frequency
Answer: C. Prevent unintended current flow
Electrical insulation separates energized conductors from people,
equipment, and other conductive paths.
9. Electrical power is measured in:
A. Ohms
B. Watts
C. Amperes
D. Coulombs
Answer: B. Watts
The watt is the SI unit of electrical power.
10. Which equation calculates DC electrical power?
, A. P = VI
B. P = V/I
C. P = R/I
D. P = I/V
Answer: A. P = VI
Electrical power equals voltage multiplied by current.
11. A 240-V load draws 5 A. Approximately how much power does
it consume?
A. 48 W
B. 245 W
C. 1,200 W
D. 12,000 W
Answer: C. 1,200 W
P = VI = 240 × 5 = 1,200 W.
12. What happens to current in a series circuit if resistance
increases while voltage remains constant?
A. Current increases
B. Current decreases
C. Current remains constant
D. Current becomes AC
Answer: B. Current decreases
Ohm's law shows that current decreases when resistance increases at
constant voltage.
13. In a parallel circuit, the voltage across each branch is generally:
A. Zero
B. Different in every branch
C. Equal to the source voltage
D. Twice the source voltage
