NYC DCAS ELECTRICIAN EXAM - (100
QUESTIONS) UP-TO-DATE ACTUAL EXAM
QUESTIONS AND 100% ACCURATE
SOLUTIONS | VERIFIED ANSWERS -
INSTANT PDF DOWNLOAD
Q1. Ohm’s Law is mathematically expressed as:
A) P = V × I
B) V = I × R
C) I = P × R
D) V = P / I
Correct ,,,,answer,,,: B
Rationale: Ohm's Law states that Voltage (V) equals Current (I) multiplied by
Resistance (R).
Q2. A 240V single-phase load draws 18A. What is the power consumption?
A) 2.16 kW
B) 4.32 kW
C) 5.10 kW
D) 3.60 kW
Correct ,,,,answer,,,: B (4.32 kW)
Rationale: Using the power formula P = V × I, 240V × 18A = 4,320W, which is
4.32 kW.
,Q3. What is the total equivalent resistance of three 15-ohm resistors
connected in parallel?
A) 5 ohms
B) 15 ohms
C) 45 ohms
D) 60 ohms
Correct ,,,,answer,,,: A (5 ohms)
Rationale: For identical resistors in parallel, the total resistance is the resistor
value divided by the number of resistors (15Ω ÷ 3 = 5Ω).
Q4. The unit of electrical resistance is the:
A) Volt
B) Ampere
C) Ohm
D) Watt
Correct ,,,,answer,,,: C (Ohm)
Rationale: The Ohm (Ω) is the SI unit of electrical resistance.
Q5. In a DC circuit, current flows:
A) Alternating direction
B) Only in one direction
C) Randomly
D) Only in transformers
Correct ,,,,answer,,,: B (Only in one direction)
Rationale: Direct Current (DC) is characterized by a unidirectional flow of electric
charge.
,Q6. A 60Hz AC system means the current changes direction how many times
per second?
A) 60 times
B) 120 times
C) 30 times
D) 100 times
Correct ,,,,answer,,,: B (120 times)
Rationale: 60 Hertz means 60 cycles per second. Since each cycle contains two
direction changes (positive to negative and negative to positive), the direction
changes 120 times per second.
Q7. The function of a capacitor is to:
A) Store magnetic energy
B) Store electrical charge
C) Increase resistance
D) Reduce voltage permanently
Correct ,,,,answer,,,: B (Store electrical charge)
Rationale: A capacitor stores electrical energy in an electrostatic field.
Q8. Which type of current is produced by a battery?
A) Alternating Current
B) Direct Current
C) Pulsating DC
D) Inductive Current
Correct ,,,,answer,,,: B (Direct Current)
Rationale: Batteries produce DC voltage, where the polarity remains constant.
, Q9. A transformer works on the principle of:
A) Static electricity
B) Chemical reaction
C) Electromagnetic induction
D) Mechanical force
Correct ,,,,answer,,,: C (Electromagnetic induction)
Rationale: A transformer transfers electrical energy between circuits through
electromagnetic induction (mutual inductance).
Q10. A step-down transformer:
A) Increases voltage
B) Reduces voltage
C) Increases frequency
D) Converts AC to DC
Correct ,,,,answer,,,: B (Reduces voltage)
Rationale: A step-down transformer has fewer secondary winding turns than
primary, resulting in a lower secondary voltage.
Q11. The power factor of an AC circuit is the ratio of:
A) Voltage to Current
B) Resistance to Impedance
C) True Power to Apparent Power
D) Inductance to Capacitance
Correct ,,,,answer,,,: C (True Power to Apparent Power)
Rationale: Power factor indicates how effectively electrical power is being
converted into useful work output.
QUESTIONS) UP-TO-DATE ACTUAL EXAM
QUESTIONS AND 100% ACCURATE
SOLUTIONS | VERIFIED ANSWERS -
INSTANT PDF DOWNLOAD
Q1. Ohm’s Law is mathematically expressed as:
A) P = V × I
B) V = I × R
C) I = P × R
D) V = P / I
Correct ,,,,answer,,,: B
Rationale: Ohm's Law states that Voltage (V) equals Current (I) multiplied by
Resistance (R).
Q2. A 240V single-phase load draws 18A. What is the power consumption?
A) 2.16 kW
B) 4.32 kW
C) 5.10 kW
D) 3.60 kW
Correct ,,,,answer,,,: B (4.32 kW)
Rationale: Using the power formula P = V × I, 240V × 18A = 4,320W, which is
4.32 kW.
,Q3. What is the total equivalent resistance of three 15-ohm resistors
connected in parallel?
A) 5 ohms
B) 15 ohms
C) 45 ohms
D) 60 ohms
Correct ,,,,answer,,,: A (5 ohms)
Rationale: For identical resistors in parallel, the total resistance is the resistor
value divided by the number of resistors (15Ω ÷ 3 = 5Ω).
Q4. The unit of electrical resistance is the:
A) Volt
B) Ampere
C) Ohm
D) Watt
Correct ,,,,answer,,,: C (Ohm)
Rationale: The Ohm (Ω) is the SI unit of electrical resistance.
Q5. In a DC circuit, current flows:
A) Alternating direction
B) Only in one direction
C) Randomly
D) Only in transformers
Correct ,,,,answer,,,: B (Only in one direction)
Rationale: Direct Current (DC) is characterized by a unidirectional flow of electric
charge.
,Q6. A 60Hz AC system means the current changes direction how many times
per second?
A) 60 times
B) 120 times
C) 30 times
D) 100 times
Correct ,,,,answer,,,: B (120 times)
Rationale: 60 Hertz means 60 cycles per second. Since each cycle contains two
direction changes (positive to negative and negative to positive), the direction
changes 120 times per second.
Q7. The function of a capacitor is to:
A) Store magnetic energy
B) Store electrical charge
C) Increase resistance
D) Reduce voltage permanently
Correct ,,,,answer,,,: B (Store electrical charge)
Rationale: A capacitor stores electrical energy in an electrostatic field.
Q8. Which type of current is produced by a battery?
A) Alternating Current
B) Direct Current
C) Pulsating DC
D) Inductive Current
Correct ,,,,answer,,,: B (Direct Current)
Rationale: Batteries produce DC voltage, where the polarity remains constant.
, Q9. A transformer works on the principle of:
A) Static electricity
B) Chemical reaction
C) Electromagnetic induction
D) Mechanical force
Correct ,,,,answer,,,: C (Electromagnetic induction)
Rationale: A transformer transfers electrical energy between circuits through
electromagnetic induction (mutual inductance).
Q10. A step-down transformer:
A) Increases voltage
B) Reduces voltage
C) Increases frequency
D) Converts AC to DC
Correct ,,,,answer,,,: B (Reduces voltage)
Rationale: A step-down transformer has fewer secondary winding turns than
primary, resulting in a lower secondary voltage.
Q11. The power factor of an AC circuit is the ratio of:
A) Voltage to Current
B) Resistance to Impedance
C) True Power to Apparent Power
D) Inductance to Capacitance
Correct ,,,,answer,,,: C (True Power to Apparent Power)
Rationale: Power factor indicates how effectively electrical power is being
converted into useful work output.
