Following are some MCQs from the test of Assistant Manager AM Electronics test that is held on 14 May, 2019 by NESCOM. You can practice and learn most important MCQs for electrical tests preparation from Here. Download link of the pdf file is at the end of this post. We are providing you a list…
Category: MCQs
FPSC Assistant Executive Engineer (Electrical) Test
Following are some MCQs from the test of Assistant Executive Engineer AXEN test that is held in 2018 by FPSC. You can practice and learn most important MCQs for electrical tests preparation from Here. Download link of the pdf file is at the end of this post. We are providing you a list of leading…
If VSWR of wave is 2, reflection coefficient will be
Q. If Voltage Standing Wave Ratio, (VSWR) of a wave is 2, its reflection coefficient will be a. 0 b. 1/3 c. 1/4 d. 1/2 Answer and Explanation: Answer is 1/3. The relationship between Voltage Standing Wave Ratio (VSWR) and Reflection Coefficient is given by the Following EquationsSWR=( 1+Γ )/ (1-Γ )—————1 and Γ= (SWR…
The system 2d2y/dt2+4dy/dt+8y=8x, has damping ratio______
Q. The system 2d2y/dt2+4dy/dt+8y=8x, has damping ratio______ a. 0.25 b. 0.1 c. 0.33 d. 0.5 Answer and Explanation Answer is 0.5 The given System is a second order system and is given by 2d2y/dt2+4dy/dt+8y=8x After taking the Laplace Transform we get 2s2Y(s)+4sY(s)+8Y(s)=8X(s) or (2s2+4s+8) Y(s)=8X(s) Y(s)/X(s) =8/(2s2+4s+8) so, the transfer function of the system is…
Full wave rectifier with 50 Hz input frequency
Q. Full wave rectifier with 50 Hz input frequency has output frequency_________ a. 100 Hz b. 50 Hz. c. 75 Hz d. None of the above Explanation A full-wave rectifier rectifies both cycles of the AC input i.e., it conducts two times during one cycle. The output frequency is Twice/double that of the input frequency….
Apparent power drawn by an A.C.
The apparent power drawn by an A.C. circuit is 10 kVA and active power is 8 kW. The reactive power in the circuit is a. 4 kVAR b. 6 kVAR c. 8 kVAR d. none of these Explanation: Fig. 1 below show the Power Triangle. It shows the relationship B/W apparent power, active and reactive…
Vertical lines on the S-plane are the lines of constant ______________
a. Peak time Tp b. Settling time Ts c. Percent Overshoot c. Rise time Answer Explanation Ans is b) Settling time Ts Solution: As Ts=4/σd where σd is real part of a complex pole. Now as shown in the above Fig. C1 below, on S-plane vertical lines represents constant real part of the imaginary poles…