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 is the primary mechanism by which a voltage-controlled oscillator (VCO) achieves frequency modulation in response to a control voltage?
A capacitor of $2\ \mu\text{F}$ is connected across a 5 V DC voltage source at time $t = 0\text{ (zero)}$ seconds through a switch. The current at $t = \infty$ seconds will be:
What happens to the rotor resistance of a deep bar rotor as the motor speed increases?
While calculating the final value theorem for a function $F(s)$ and $f(t)$, the limit is applied as:
For long transmission lines, the voltage regulation becomes worse when:
In forced commutation, which parameter is forced to 0 (zero) to turn off the SCR?
In a MOD-10 counter, what is the count sequence after 9?
What is the impact of a line-to-line fault on the voltage in the faulted phases?
The standard form of characteristics equation of the second order system transfer function is an equation which includes:
Which of the following is the unit of the Poynting vector?
Select the correct option based on the given statements.
Statement 1: In a balanced three-phase system, the phase voltage is the voltage measured between any one phase and the neutral.
Statement 2: The line voltage is the voltage measured between any two phases.
The power factor (pf) of an AC circuit is defined as the ratio of:
If $K_p$ denotes the position error constant, then the steady state error of a second order control system for step input is defined as:
Which of the following is NOT a typical application of flip-flops?
In a circuit with three resistors in series, if the current through the circuit is 2 A and the resistors have values of $3\;\Omega$, $5\;\Omega$ and $7\;\Omega$, respectively, what is the total voltage across the loop according to KVL?
A capacitive filter is used to filter out the AC component of a rectified voltage. The filter consists of a capacitor $C$ connected in parallel with a load resistor $R_L$. If the rectified voltage has a peak value of $V_P$ and a frequency of $f$, what is the effect of increasing the value of the capacitor $C$ on the ripple voltage $V_R$?
In an IGBT, the control terminal is called the:
For a two-sided sequence $x[n]$, which of the following statements about the ROC of its Z-transform is correct?
What is the effect of time-scaling $x[an]$ on the Z-Transform?
Which of the following equations shows that the time-varying $\vec{E}$ field is not conservative?
Seven boxes J, K, L, M, W, X and Y are kept one over the other but not necessarily in the same order. No box is kept above Y. Only three boxes are kept between Y and M. Only one box is kept between L and K. K is kept immediately above M. Only four boxes are kept between L and J. X is kept at some place above W. Which box is kept second below X?
Which of the following letter-number clusters will replace the question mark (?) in the given series to make it logically complete?
DER124, JKX117, PQD110, VWJ103, ?
The value of $2 - 3[3 + 4(3 - 3(7 - 5) + 8) - 12] \div 3$ is:
Which of the following letter-clusters should replace # and % so that the pattern and relationship followed between the letter-cluster pair on the left side of :: is the same as that on the right side of ::?
# : AEK :: BFL : %
Find the average of cubes of natural numbers from 1 to 15.