RRB Section Engineer Question Papers Electronics

I want the previous year question paper of Electronics Engineering of RRB Section Engineer exam so can you please provide me?

[Pathak]

As you want the previous year question paper of Electronics Engineering of RRB Section Engineer exam so here I am providing you.

RRB Section Engineer exam Electronics Engineering question paper

Question1. In relation to the synchronous machines, which one of the following statements is false?
In salient pole machines, the direct-axis synchronous reactance is greater than the quadrature-axis synchronous reactance
The damper bars help the synchronous motor self start
Short circuit ratio is the ratio of the field current required to produce the rated voltage on open circuit to the rated armature current
The V-curve of a synchronous motor represents the variation in the armature current with field excitation, at a given output power.

Answer : (C)

Question2. A 800 kV transmission line is having per phase line inductance of 1.1 mH/km and per phase line capacitance of 11.68 nF/km. Ignoring the length of the line, its ideal power transfer capability in MW is?
1204 MW
1504 MW
2085 MW
2606 MW

Answer : (C)

Question3. High Voltage DC (HVDC) transmission is mainly used for
Bulk power transmission over very long distances
Inter-connecting two systems with the same nominal frequency
Eliminating reactive power requirement in the operation
Minimizing harmonics at the converter stations

Answer : (A)

Question4. Body effect in MOSFETs results in
Increase in the value of trans conductance
Change in the value of threshold voltage
Decrease in the value of trans conductance
Increase in the value of output resistance

Question5. A 2-port network has parameters of ABCD. If all the impedences in the network are Doubled, then
A and D are remain unchanged B is doubled and C is halved
A, B, C and D are all Doubled
A and D are doubled C and B remain unchanged
A and D remain unchanged C is doubled and B is halved.

Ans : (a

Lissajous pattern shown in a double-beam cathode-ray oscilloscope screen for two sinusoidal voltages of equal magnitude and of the same frequency but of phase shift of 300 electrical is
A circle
A straight line at 45 0 in the first and third quadrant
An ellipse in the first and third quadrant
An ellipse in the second and fourth quadrant

Ans : (c

To increase the range of a voltmeter
A low resistance in series is connected with the voltmeter
A low resistance in parallel is connected with the voltmeter
A high resistance in series is connected with the voltmeter
A high resistance in parallel is connected with the voltmeter

Ans : (c