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 number of string of insulators is used for 132 kV transmission if a suspension type insulator is used for overhead lines?
Cultural Algorithms (CAs) are dual inheritance systems that consist of:
Find $I_N$ and $R_N$, if the following network is replaced by Norton's equivalent between terminals 'a' and 'b':
Which of the following tests is performed for testing of DC shunt motors?
A stranded conductor has 3 layers of wire. Find the diameter of the conductor if the diameter of each strand is 5 mm.
The electric field intensity (E) at point r due to a point charge (Q) located at r' is:
Consider the single-phase mid-point cycloconverter circuit shown below:
What should be the triggering sequence in the given single phase cycloconverter circuit to obtain one-third of supply frequency?
For a feedback control system of type 2, the steady state error for a ramp input is:
In case of electromagnetic waves, the electric field will be perpendicular to:
What is the surge impedance of a transmission line where $L$ is the inductance and $C$ is the capacitance per unit length of the line?
For the following circuit, $V_{BE} = 0.7\text{ V}$ and $\beta_{dc}$ is 150. Calculate the value of $I_E$.
In the design of digital filters, we often choose a filter with a specified magnitude characteristic that has:
CISC is the acronym used for:
A long shunt compound generator delivers a load current of 50 A and 500 V. It has armature, series field and shunt field resistance of 0.04 $\Omega$, 0.025 $\Omega$ and 125 $\Omega$, respectively. If the total voltage drop in brushes is 3 V, find the generated voltage.
A DC series motor takes 40 A at 250 V and 955 rpm. The armature and field resistance are 0.3 $\Omega$ and 0.2 $\Omega$, respectively. What will be the torque developed in the armature?
Which of the following has a dimension?
The average value of a full-wave rectified voltage with a peak value of 66 V is:
Which of the following is NOT an asymmetrical fault?
Find the energy stored by a coil of inductance 20 mH and carrying a current of 1.5 A.
Consider the sinusoidal signal $x(t) = \cos\left(\frac{\omega_s}{2}t + \phi\right)$. Suppose this signal is sampled at $\omega_s$ frequency. If this impulse-sampled signal is applied as the input to an ideal lowpass filter with cutoff frequency $\omega_s/2$, the resulting output is:
Which of the following are true characteristics of Insulated Gate Bipolar Transistors (IGBTs)?
A complex network consisting of a number of parallel branches, where each parallel branch consists of voltage source with series impedance, can be replaced with equivalent circuit consisting of one voltage source in series with equivalent impedance. This is:
If a two-port network is represented with h-parameters, then the condition for reciprocity is:
Each search parameter ($p_S$) in Fuzzy algorithms is specified by:
A 3-phase 400/200 V, Y-Y connected wound rotor induction motor has $0.06\;\Omega$ rotor resistance and $0.3\;\Omega$ stand still reactance per phase. Find the additional resistance required in the rotor circuit to make the starting torque equal to the maximum torque of the motor.