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Latest HCL Workmen Electrical Exam Question (Objective Questions), MCQ in English

Subjects : Electrical, General Knowledge

Question Bank HCL Workmen Chargeman Electrical Exam - English
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Electrical

Question 1Single Answer
What does Ohm’s Law state?
  1. A
    Voltage is proportional to current and resistance
  2. B
    Power is equal to voltage times current
  3. C
    Resistance is proportional to current and voltage
  4. D
    Voltage is inversely proportional to current and resistance
Question 2Single Answer
The total resistance in a series circuit with three resistors of 2Ω, 3Ω, and 4Ω is:
  1. A
    9Ω
  2. B
    2Ω
  3. C
    3Ω
  4. D
    1Ω
Question 3Single Answer
According to Ohm’s law, if the voltage across a 5Ω resistor is 10V, the current through it will be:
  1. A
    1A
  2. B
    2A
  3. C
    5A
  4. D
    10A
Question 4Single Answer
Which of the following is the unit of electric power?
  1. A
    Ampere
  2. B
    Watt
  3. C
    Volt
  4. D
    Ohm
Question 5Single Answer
Kirchhoff’s Current Law (KCL) states that the sum of currents entering a junction is eual to:
  1. A
    The sum of currents leaving the junction
  2. B
    Zero
  3. C
    The resistance at the junction
  4. D
    The total voltage at the junction
Question 6Single Answer
Kirchhoff’s Voltage Law (KVL) states that the sum of the electrical potential differences around any closed loop is eual to:
  1. A
    Zero
  2. B
    The sum of the currents
  3. C
    The total resistance
  4. D
    The voltage of the source
Question 7Single Answer
The total resistance in a parallel circuit with resistors 4Ω, 6Ω, and 12Ω is:
  1. A
    2Ω
  2. B
    4Ω
  3. C
    6Ω
  4. D
    8Ω
Question 8Single Answer
Which of the following is true for an ideal voltage source?
  1. A
    Voltage varies with the load
  2. B
    It maintains constant voltage across any load
  3. C
    It has no internal resistance
  4. D
    Voltage is inversely proportional to current
Question 9Single Answer
The energy dissipated in a resistor is given by the formula:
  1. A
    E = I² R
  2. B
    E = V² / R
  3. C
    E = V × I × t
  4. D
    All of the above
Question 10Single Answer
Which of the following is a statement of the Superposition Theorem?
  1. A
    The total response in a linear network with multiple sources is the sum of the responses to each source acting individually.
  2. B
    The current in each branch of a circuit is the same.
  3. C
    The voltage across the network is constant for all resistors.
  4. D
    Power is conserved in a closed circuit.
Question 11Single Answer
Thevenin’s Theorem is used to simplify complex circuits by replacing the part of the circuit with:
  1. A
    A series voltage source and a resistor
  2. B
    A parallel voltage source and a resistor
  3. C
    A single current source
  4. D
    A single resistance
Question 12Single Answer
Norton’s Theorem is the dual of which other theorem?
  1. A
    Thevenin’s Theorem
  2. B
    Ohm’s Law
  3. C
    Kirchhoff’s Law
  4. D
    Faraday’s Law
Question 13Single Answer
The transient response of an RLC circuit is determined by its:
  1. A
    Inductive reactance
  2. B
    Time constant
  3. C
    Capacitance only
  4. D
    Resistance only
Question 14Single Answer
The frequency-domain analysis of circuits is used to study circuits that have:
  1. A
    DC only
  2. B
    Steady-state responses only
  3. C
    AC signals
  4. D
    Both DC and AC signals
Question 15Single Answer
The Laplace Transform is used to convert time-domain signals into the frequency domain because it:
  1. A
    Makes solving differential equations easier
  2. B
    Eliminates the need for numerical analysis
  3. C
    Only works with sinusoidal signals
  4. D
    Helps in calculating power
Question 16Single Answer
In an RLC circuit, the transient response depends on the:
  1. A
    Resistance, inductance, and frequency
  2. B
    Voltage supply only
  3. C
    Inductance and capacitance only
  4. D
    Capacitance and frequency only
Question 17Single Answer
The time constant of an RC circuit is given by the formula:
  1. A
    τ = R / L
  2. B
    τ = L / R
  3. C
    τ = R × C
  4. D
    τ = C / R
Question 18Single Answer
In a 3-phase system, the total power is given by the formula:
  1. A
    P = V × I
  2. B
    P = √3 × V × I × cos(θ)
  3. C
    P = V × I × cos(θ)
  4. D
    P = V × I × sin(θ)
Question 19Single Answer
The apparent power in an AC circuit is measured in:
  1. A
    Volt-amperes (VA)
  2. B
    Watts (W)
  3. C
    Joules (J)
  4. D
    Ohms (Ω)
Question 20Single Answer
In the frequency domain, a series resonance circuit has a:
  1. A
    High impedance at resonance
  2. B
    Low impedance at resonance
  3. C
    No impedance at resonance
  4. D
    Voltage drop at resonance
Question 21Single Answer
The transient response in an RLC circuit decays to zero after a time proportional to the:
  1. A
    Inductance and capacitance values
  2. B
    Voltage amplitude
  3. C
    Resistance and capacitance values
  4. D
    Resistance and inductance values
Question 22Single Answer
In a parallel circuit, when resistors are combined, the overall resistance will always be:
  1. A
    Greater than any of the individual resistances
  2. B
    Equal to the sum of all resistances
  3. C
    Less than the smallest resistor in the circuit
  4. D
    Independent of the number of resistors in the circuit
Question 23Single Answer
The impedance of a series RLC circuit at resonance is:
  1. A
    Zero
  2. B
    Inductive
  3. C
    Capacitive
  4. D
    Resistive
Question 24Single Answer
Which of the following is a characteristic of a purely inductive circuit?
  1. A
    The voltage leads the current by 90°
  2. B
    The current leads the voltage by 90°
  3. C
    Voltage and current are in phase
  4. D
    Power factor is 1
Question 25Single Answer
The power factor of an inductive circuit is:
  1. A
    1
  2. B
    Zero
  3. C
    Negative
  4. D
    Less than 1
Question 26Single Answer
The total inductance in a series circuit with inductors of 2H, 4H, and 6H is:
  1. A
    12H
  2. B
    2H
  3. C
    4H
  4. D
    6H
Question 27Single Answer
What is the unit of electric capacitance?
  1. A
    Ohm
  2. B
    Ampere
  3. C
    Farad
  4. D
    Volt
Question 28Single Answer
Which component in a circuit is used to oppose changes in current?
  1. A
    Resistor
  2. B
    Capacitor
  3. C
    Inductor
  4. D
    Diode
Question 29Single Answer
The reactance in a series RC circuit increases as the frequency of the applied voltage:
  1. A
    Decreases
  2. B
    Increases
  3. C
    Remains the same
  4. D
    First increases and then decreases
Question 30Single Answer
A circuit consisting of a resistor, capacitor, and inductor connected in parallel has:
  1. A
    Zero total impedance at resonance
  2. B
    High impedance at resonance
  3. C
    Low impedance at resonance
  4. D
    No resonance point
Question 31Single Answer
In a parallel RLC circuit, the impedance at resonance is:
  1. A
    Infinite
  2. B
    Zero
  3. C
    Equal to the resistance value
  4. D
    Equal to the capacitance value
Question 32Single Answer
In a series RLC circuit, at resonance, the impedance is:
  1. A
    Zero
  2. B
    Infinite
  3. C
    Minimum
  4. D
    Equal to the inductive reactance
Question 33Single Answer
In a parallel RLC circuit, at resonance, the impedance is:
  1. A
    Zero
  2. B
    Equal to the resistance
  3. C
    Infinite
  4. D
    Equal to the capacitive reactance
Question 34Single Answer
Which of the following is true for a purely capacitive circuit?
  1. A
    The voltage lags the current by 90°
  2. B
    The current leads the voltage by 90°
  3. C
    Voltage and current are in phase
  4. D
    Power factor is 1
Question 35Single Answer
Which of the following network theorems is used to simplify circuits containing both voltage and current sources?
  1. A
    Thevenin’s Theorem
  2. B
    Norton's Theorem
  3. C
    Superposition Theorem
  4. D
    Maximum Power Transfer Theorem
Question 36Single Answer
In an inductive circuit, the power factor is typically:
  1. A
    Greater than 1
  2. B
    Less than 1
  3. C
    Equal to 1
  4. D
    Zero
Question 37Single Answer
In a capacitive reactance, the current is:
  1. A
    In phase with voltage
  2. B
    Leading voltage by 90°
  3. C
    Lagging voltage by 90°
  4. D
    Lagging voltage by 45°
Question 38Single Answer
Which of the following is used to determine the time-domain behavior of a circuit in the Laplace domain?
  1. A
    Fourier Transform
  2. B
    Kirchhoff’s Law
  3. C
    Differential equations
  4. D
    All of the above
Question 39Single Answer
For a sinusoidal input, the phasor representation is most useful to analyze:
  1. A
    Time domain
  2. B
    Frequency domain
  3. C
    Transient response
  4. D
    Power factor correction
Question 40Single Answer
In Laplace Transform, the function F(s) represents:
  1. A
    Frequency response
  2. B
    Time response
  3. C
    Laplace response
  4. D
    Both time and Frequency domain responses
Question 41Single Answer
Which of the following is the formula for calculating the total impedance in a series RLC circuit at resonance?
  1. A
    Z = R
  2. B
    Z = 0
  3. C
    Z = L + C
  4. D
    Z = R + L + C
Question 42Single Answer
What is the main purpose of an electrical transformer?
  1. A
    To step up or step down voltage
  2. B
    To increase current
  3. C
    To convert AC to DC
  4. D
    To regulate Frequency
Question 43Single Answer
The efficiency of an electrical transformer is highest at:
  1. A
    Full load
  2. B
    Half load
  3. C
    No load
  4. D
    Short circuit condition
Question 44Single Answer
In a 3-phase transformer, the number of conductors reuired for a star connection is:
  1. A
    2
  2. B
    3
  3. C
    4
  4. D
    6
Question 45Single Answer
The power factor of a purely resistive circuit is:
  1. A
    0
  2. B
    0.5
  3. C
    1
  4. D
    Infinity
Question 46Single Answer
In an AC circuit, the average power is measured in terms of:
  1. A
    Watt
  2. B
    Volt-ampere
  3. C
    Joules
  4. D
    Ohms
Question 47Single Answer
The current in a purely inductive circuit leads the voltage by:
  1. A
    45°
  2. B
    90°
  3. C
    180°
  4. D
    0°
Question 48Single Answer
Which of the following components is used to protect the circuit from overload?
  1. A
    Fuse
  2. B
    Capacitor
  3. C
    Inductor
  4. D
    Switch
Question 49Single Answer
In a series RLC circuit, if the inductive reactance is greater than the capacitive reactance, the circuit is considered to be:
  1. A
    Capacitive
  2. B
    Inductive
  3. C
    Resistive
  4. D
    Resonant
Question 50Single Answer
Which type of motor is used in applications where the speed control is reuired?
  1. A
    Induction motor
  2. B
    Synchronous motor
  3. C
    DC motor
  4. D
    Universal motor
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