Nevada C-2 Electrical Contractor
Exam 2026/2027 Test Bank – 300 Real
Exam Questions & Verified Answers |
Already Graded A+ | Complete
Licence Prep Guide
SECTION 1: ELECTRICAL THEORY & PRINCIPLES
Question 1
What is the unit of measurement for electrical current?
A) Volt
B) Ampere
C) Ohm
D) Watt
Correct Answer: B) Ampere
Rationale: The ampere (amp) is the standard unit for
measuring electrical current. A volt measures electrical
,potential difference, an ohm measures resistance, and a
watt measures electrical power. This is a foundational
concept for all electrical calculations tested on the C-2
exam.
Question 2
According to Ohm's Law, voltage is equal to:
A) Current divided by resistance
B) Current multiplied by resistance
C) Resistance divided by current
D) Power divided by current
Correct Answer: B) Current multiplied by resistance
Rationale: Ohm's Law is expressed as V = I × R, where V is
voltage, I is current, and R is resistance. This fundamental
relationship is essential for troubleshooting and circuit
analysis questions on the exam.
Question 3
In a series circuit, the total resistance is:
,A) Equal to the lowest resistance
B) Equal to the highest resistance
C) The sum of all individual resistances
D) The reciprocal of the sum of reciprocals
Correct Answer: C) The sum of all individual resistances
Rationale: In a series circuit, resistances add directly: R_total
= R₁ + R₂ + R₃ + ... The total resistance is always greater
than the largest individual resistance in the circuit.
Question 4
In a parallel circuit, the total resistance is:
A) Equal to the sum of all resistances
B) Always greater than the largest resistance
C) Always less than the smallest resistance
D) Equal to the largest resistance
Correct Answer: C) Always less than the smallest
resistance
Rationale: In a parallel circuit, the total resistance is always
less than the smallest individual resistance. This is because
, parallel paths provide additional routes for current flow,
reducing overall opposition to current.
Question 5
A series 60 Hz circuit has 12 ohms of resistance, 20
ohms of inductive reactance, and 11 ohms of
capacitive reactance. What is the impedance of the
circuit?
A) 15.0 ohms
B) 9.0 ohms
C) 21.9 ohms
D) 43.0 ohms
Correct Answer: A) 15.0 ohms
Rationale: Series impedance is calculated as Z = √(R² + (XL
− XC)²). Net reactance is 20 − 11 = 9 ohms, so Z = √(12² +
9²) = √(144 + 81) = √225 = 15.0 ohms.
Question 6
Exam 2026/2027 Test Bank – 300 Real
Exam Questions & Verified Answers |
Already Graded A+ | Complete
Licence Prep Guide
SECTION 1: ELECTRICAL THEORY & PRINCIPLES
Question 1
What is the unit of measurement for electrical current?
A) Volt
B) Ampere
C) Ohm
D) Watt
Correct Answer: B) Ampere
Rationale: The ampere (amp) is the standard unit for
measuring electrical current. A volt measures electrical
,potential difference, an ohm measures resistance, and a
watt measures electrical power. This is a foundational
concept for all electrical calculations tested on the C-2
exam.
Question 2
According to Ohm's Law, voltage is equal to:
A) Current divided by resistance
B) Current multiplied by resistance
C) Resistance divided by current
D) Power divided by current
Correct Answer: B) Current multiplied by resistance
Rationale: Ohm's Law is expressed as V = I × R, where V is
voltage, I is current, and R is resistance. This fundamental
relationship is essential for troubleshooting and circuit
analysis questions on the exam.
Question 3
In a series circuit, the total resistance is:
,A) Equal to the lowest resistance
B) Equal to the highest resistance
C) The sum of all individual resistances
D) The reciprocal of the sum of reciprocals
Correct Answer: C) The sum of all individual resistances
Rationale: In a series circuit, resistances add directly: R_total
= R₁ + R₂ + R₃ + ... The total resistance is always greater
than the largest individual resistance in the circuit.
Question 4
In a parallel circuit, the total resistance is:
A) Equal to the sum of all resistances
B) Always greater than the largest resistance
C) Always less than the smallest resistance
D) Equal to the largest resistance
Correct Answer: C) Always less than the smallest
resistance
Rationale: In a parallel circuit, the total resistance is always
less than the smallest individual resistance. This is because
, parallel paths provide additional routes for current flow,
reducing overall opposition to current.
Question 5
A series 60 Hz circuit has 12 ohms of resistance, 20
ohms of inductive reactance, and 11 ohms of
capacitive reactance. What is the impedance of the
circuit?
A) 15.0 ohms
B) 9.0 ohms
C) 21.9 ohms
D) 43.0 ohms
Correct Answer: A) 15.0 ohms
Rationale: Series impedance is calculated as Z = √(R² + (XL
− XC)²). Net reactance is 20 − 11 = 9 ohms, so Z = √(12² +
9²) = √(144 + 81) = √225 = 15.0 ohms.
Question 6
