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).
What happens to the output voltage when the pulse width increases in PWM control?
What is the primary limitation of using a differentiator circuit with an OPAMP in a practical application?
Identify the correct statement related to transient response characteristics of a second order control system.
If the damping ratio for a second order system in a control system is represented by '$d$' (generally denoted by $\zeta$), then we get Underdamped Response if _________ and Overdamped Response if _________.
What is the magnetic field intensity due to a straight current carrying filamentary conductor of infinite length? (where conductor is along the z-axis)
Why are single squirrel cage induction motors preferred in irrigation pump sets?
What does the control parameter $\alpha$ represent in the overlapping control of the chopper?
What is the Z-transform of $x[n+k]$ in terms of $X(z)$?
What type of shift register allows data to be shifted in both left and right directions?
In differential protection, the basic principle is based on the comparison of:
Which of the following options is correct regarding the magnetic vector potential ($A$) and the magnetic flux density ($B$)?
If the transfer function of a control system has 4 poles and 2 zeros, then the order of the system is:
In a basic current mirror circuit using two identical bipolar junction transistors (BJTs), the collector current of the output transistor ($Q_2$) is:
Select the correct option based on the given statements.
Statement 1: In a parallel circuit, the voltage across each component is the same as the source voltage.
Statement 2: The total current in a parallel circuit is equal to the sum of the currents through all the branches.
What is the major difference between a T flip-flop and a JK flip-flop?
The Region of Convergence (ROC) of a left-sided sequence in the Z-domain is:
In an AC circuit, improving the power factor can be achieved by:
Which of the following modifications can be made to a 4-bit parallel adder to perform subtraction?
What happens when $J=0\text{ (zero)}$ and $K=1$ in a JK flip-flop?
In a control system, if the input is a unit step function, then the steady state error for type-1 system is ________ and for type-2 system is ________.
Which of the following statements correctly describes the force experienced by a charged particle moving in a magnetic field?
In distance protection, the relay operates when:
The time-delay characteristic of overvoltage protection is used to:
In the steady-state response of an RL circuit, the voltage across the inductor is:
What is the main advantage of an autotransformer over a two-winding transformer?