Prepare for the BHEL Engineer Trainee (ET Electrical) recruitment examination with official previous years' solved question papers across Electric Circuits & Fields, Electrical Machines (Turbo-Generators, Synchronous & Induction Motors, Transformers), Power Systems (Generation, EHV Transmission, Grid Stability & Switchgear Protection), Control Systems, Power Electronics & HVDC Transmission, Electrical & Electronic Measurements, Analog & Digital Electronics, and General Engineering Aptitude.
Marking pattern: +1.00 positive, -0.25 (1/4th) negative marking (Official BHEL Engineer Trainee Computer-Based Test Scheme).
Which of the following statements correctly describes a property of the Discrete Fourier Transform (DFT) related to frequency-domain sampling and complex addition?
Which of the following equations represents the magnetic field intensity according to Biot-Savart's Law?
In a single-phase full-bridge voltage source inverter, what is the peak output voltage (fundamental component) for sinusoidal PWM with a modulation index $m_a = 1$?
In the unbalanced current test, what is typically used to apply reduced voltage to the winding?
In the context of relays, selectivity refers to:
Which of the following is a non-conventional source of power generation that uses the heat from the Earth's internal sources?
What is the borrow output of a half subtractor, when the inputs $A = 0\text{ (zero)}$ and $B = 1$? Assume subtraction as $A - B$.
Why do slip ring induction motors have better starting torque than squirrel cage motors?
The power loss in a short transmission line is primarily due to:
What is Electric Field Density for a point charge $Q$ located at origin, as per Gauss's Law?
What is the Region of Convergence (ROC) for a finite-duration discrete-time signal $x[n]$?
If there is no surface current ($J_s = 0\text{ (zero)}$) at the interface between two media, what happens to the tangential component of the magnetic field intensity ($H$) across the boundary?
In a buck converter operating in continuous-conduction mode, what happens when the switch is ON?
The convolution property of the Z-Transform states that:
Identify whether the following statements are true or false.
Statement 1: The Superposition Theorem is used in AC circuits to simplify the analysis when there are multiple independent sources (voltage or current). The theorem states that the response in a linear circuit with multiple sources is the sum of the responses from each individual source acting alone.
Statement 2: The Superposition Theorem is only applicable to DC circuits.
If the time constant of the RC series circuit is 1 sec and the value of capacitor $C = 1\ \mu\text{F}$, determine the value of resistor $R$.
Determine the Neper frequency (in rad/s) of a series RLC circuit if $R = 1\text{ M}\Omega$, $C = 1\ \mu\text{F}$, and $L = 1\text{ mH}$.
Which of the following applications is NOT suitable for a squirrel cage induction motor?
What is the key difference between a JK and a T flip-flop in terms of conversion?
Which of the following options represents a Poisson's equation in electrostatics for a charge-free region?
Identify the correct statement with respect to unit step response of a second order system.
Which mode of dual converter operation involves only one bridge conducting at a time?
The impulse response of a second order system can be obtained by:
Which of the following statements is correct regarding the inductance of a toroidal coil with a high-permeability core?
The Rate of Rise of Recovery Voltage (RRRV) is an important parameter in switchgear protection because it: