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).
Proper application of which of the following theorems to Coulomb's law results in Gauss's law?
Network capacity in a neural network is defined as:
A cycloconverter is basically:
Which of the following methods gives only absolute stability of the system?
A network has 40 number of total buses, of which 12 are voltage buses and 5 are generator buses. Find the size of the Jacobian matrix.
An airline has characteristic impedance of 70 $\Omega$ and phase constant of 3 rad/m at 100 MHz. Calculate the capacitance per metre of the line.
1. Power MOSFETs are majority carrier devices.
2. Power MOSFETs cause inferior conduction characteristics as the voltage rating is increased above 200 V.
Read the above statements and select the correct option.
Calculate the number of stages for a multiplier or a cascaded circuit with frequency 50 Hz, capacitance = $0.2\ \mu\text{F}$, voltage = 100 kV, and current = 10 mA.
The equivalent inductances of two coils of 3 H and 5 H in series aiding flux with mutual inductance of 2 H is:
A discrete time real valued signal is said to be symmetric if:
An N-channel E-MOSFET has the following parameters:
$I_{D(\text{ON})} = 5\text{ mA}$ at $V_{GS} = 10\text{ V}$ and $V_{GS(\text{th})} = 5\text{ V}$
Calculate its drain current for $V_{GS} = 8\text{ V}$.
The discrete-time Fourier transform is always periodic in $\omega$ with period:
In an 8085 processor, which bit of flag register is reserved for Auxiliary Carry flag?
Laplace transform of a unit parabolic function occurring at $t = 0\text{ (zero)}$ is given by:
Find Req in the following circuit across terminals a and b.
In practice, the choice of a liquid dielectric for a given application is made primarily on the basis of its:
Z transform of continuous unit step function is:
Read the following statements and select the correct option pertaining to Z-transform.
Statement 1: Inverse Z-transforms can be obtained by partial fraction expansion methods.
Statement 2: Z-transform can be used for the solution of linear difference equations.
Which of the following methods is usually used to determine the efficiency of a traction motor?
A magnetic circuit having coil inductance $L$ is dependent on $x$. Calculate the mechanical force of magnetic origin developed.
During the message recovery, it is observed that the terms are overlapping. The signal is:
When corona is present on the conductors in EHV lines, it generates audible noise which is especially high during foul weather. The noise frequency range is:
In a magnetic circuit, a current of 5 A passes through a coil having 300 uniform turns. Find the total flux if the reluctance of the magnetic path is $30 \times 10^{5}\text{ AT/Wb}$.
Which of the following materials is commonly used for HV insulation?
What should be the value of $\omega$ for a low pass filter to have a magnitude of transfer function equal to 0.707?