Utah Electrical Contractor
Examination Newest Evaluated Exam
Most Tested Questions Collection &
Verified Detailed Answers With
Rationales| Tutor Verified Success
Exam) Graded A+
Section 1 — Electrical Theory, Current, Resistance & Voltage
1. What is the basic unit of electrical current?
A. Volt
B. Ohm
C. Watt
D. Ampere
Rationale: The ampere (amp) is the SI unit used to measure electrical
current.
2. Which formula represents Ohm's Law?
A. P = EI
B. E = P × I
C. E = I × R
D. R = P × E
Rationale: Ohm's Law states that voltage (E) equals current (I)
multiplied by resistance (R).
3. A 120-volt circuit has a resistance of 20 ohms. What current
flows?
,A. 2 A
B. 4 A
C. 6 A
D. 8 A
Rationale: I = E/R = 120/20 = 6 amperes.
4. A 240-volt load draws 10 amperes. What is its approximate
power?
A. 240 W
B. 1,200 W
C. 2,400 W
D. 4,800 W
Rationale: For a resistive load, P = E × I = 240 × 10 = 2,400 watts.
5. If resistance increases while voltage remains constant, current
will:
A. Increase
B. Remain constant
C. Decrease
D. Become zero immediately
Rationale: By Ohm's Law, current is inversely proportional to
resistance when voltage is constant.
6. What is the resistance of a circuit drawing 5 amperes from a 120-
volt source?
A. 12 Ω
B. 20 Ω
C. 24 Ω
D. 60 Ω
Rationale: R = E/I = 120/5 = 24 ohms.
7. What happens to the total resistance of series-connected
resistors?
,A. It is always lower than the smallest resistor
B. It equals the largest resistor
C. The resistances add together
D. It becomes zero
Rationale: Series resistance is calculated by adding each resistance.
8. Two 10-ohm resistors connected in parallel have a total
resistance of:
A. 20 Ω
B. 10 Ω
C. 5 Ω
D. 2 Ω
Rationale: Equal resistances in parallel have a total resistance equal
to one-half of either resistor.
9. Which material is generally a good electrical conductor?
A. Glass
B. Rubber
C. PVC
D. Copper
Rationale: Copper has high electrical conductivity and is commonly
used for electrical conductors.
10. What is electrical power measured in?
A. Ohms
B. Amperes
C. Volts
D. Watts
Rationale: The watt is the unit of electrical power.
11. A 1,500-watt heater operates at 120 volts. Approximately how
much current does it draw?
, A. 5 A
B. 8 A
C. 12.5 A
D. 18 A
Rationale: I = P/E = 1,500/120 = 12.5 amperes.
12. What is the primary effect of voltage drop in a circuit?
A. Increased available voltage
B. Reduced voltage at the load
C. Increased conductor insulation rating
D. Elimination of current
Rationale: Voltage drop represents the loss of voltage as current
travels through circuit impedance.
13. Which condition normally causes greater voltage drop?
A. Shorter conductors
B. Larger conductors
C. Longer conductors
D. Lower current
Rationale: Conductor impedance and therefore voltage drop
generally increase as conductor length increases.
14. If conductor size is increased, conductor resistance generally:
A. Increases
B. Decreases
C. Doubles
D. Becomes infinite
Rationale: Larger conductors have a greater cross-sectional area and
lower resistance.
15. What is the electrical term for opposition to alternating
current?
Examination Newest Evaluated Exam
Most Tested Questions Collection &
Verified Detailed Answers With
Rationales| Tutor Verified Success
Exam) Graded A+
Section 1 — Electrical Theory, Current, Resistance & Voltage
1. What is the basic unit of electrical current?
A. Volt
B. Ohm
C. Watt
D. Ampere
Rationale: The ampere (amp) is the SI unit used to measure electrical
current.
2. Which formula represents Ohm's Law?
A. P = EI
B. E = P × I
C. E = I × R
D. R = P × E
Rationale: Ohm's Law states that voltage (E) equals current (I)
multiplied by resistance (R).
3. A 120-volt circuit has a resistance of 20 ohms. What current
flows?
,A. 2 A
B. 4 A
C. 6 A
D. 8 A
Rationale: I = E/R = 120/20 = 6 amperes.
4. A 240-volt load draws 10 amperes. What is its approximate
power?
A. 240 W
B. 1,200 W
C. 2,400 W
D. 4,800 W
Rationale: For a resistive load, P = E × I = 240 × 10 = 2,400 watts.
5. If resistance increases while voltage remains constant, current
will:
A. Increase
B. Remain constant
C. Decrease
D. Become zero immediately
Rationale: By Ohm's Law, current is inversely proportional to
resistance when voltage is constant.
6. What is the resistance of a circuit drawing 5 amperes from a 120-
volt source?
A. 12 Ω
B. 20 Ω
C. 24 Ω
D. 60 Ω
Rationale: R = E/I = 120/5 = 24 ohms.
7. What happens to the total resistance of series-connected
resistors?
,A. It is always lower than the smallest resistor
B. It equals the largest resistor
C. The resistances add together
D. It becomes zero
Rationale: Series resistance is calculated by adding each resistance.
8. Two 10-ohm resistors connected in parallel have a total
resistance of:
A. 20 Ω
B. 10 Ω
C. 5 Ω
D. 2 Ω
Rationale: Equal resistances in parallel have a total resistance equal
to one-half of either resistor.
9. Which material is generally a good electrical conductor?
A. Glass
B. Rubber
C. PVC
D. Copper
Rationale: Copper has high electrical conductivity and is commonly
used for electrical conductors.
10. What is electrical power measured in?
A. Ohms
B. Amperes
C. Volts
D. Watts
Rationale: The watt is the unit of electrical power.
11. A 1,500-watt heater operates at 120 volts. Approximately how
much current does it draw?
, A. 5 A
B. 8 A
C. 12.5 A
D. 18 A
Rationale: I = P/E = 1,500/120 = 12.5 amperes.
12. What is the primary effect of voltage drop in a circuit?
A. Increased available voltage
B. Reduced voltage at the load
C. Increased conductor insulation rating
D. Elimination of current
Rationale: Voltage drop represents the loss of voltage as current
travels through circuit impedance.
13. Which condition normally causes greater voltage drop?
A. Shorter conductors
B. Larger conductors
C. Longer conductors
D. Lower current
Rationale: Conductor impedance and therefore voltage drop
generally increase as conductor length increases.
14. If conductor size is increased, conductor resistance generally:
A. Increases
B. Decreases
C. Doubles
D. Becomes infinite
Rationale: Larger conductors have a greater cross-sectional area and
lower resistance.
15. What is the electrical term for opposition to alternating
current?
