Master official DSSSB Junior Engineer (Electrical) previous years' solved question papers across Tier-I and Tier-II examinations. Covers Technical Electrical Engineering (Circuits & Network Theory, Electromagnetic Fields, Electrical Machines, Generation, Transmission & Distribution, Switchgear & Protection, Estimation & Costing, Electrical Wiring, Illumination Engineering, and Electronics) along with General Awareness, Reasoning, Quantitative Aptitude, English, and Hindi comprehension.
Marking pattern: +1.00 positive, -0.25 (0.25 Marks) negative marking (Official DSSSB Computer-Based Examination Scheme).
What is the simplified form of the given Boolean expression?
$$(A + B)(\overline{A} + B)$$
For the emitter bias circuit shown, what is $I_E$ if $V_{BE} = 0.7\text{ V}$ and $\beta = 100$?
What is the back EMF of a 200 V DC motor, while drawing an armature current of 100 A, if the armature resistance is 0.1 Ω?
In a 3-wire DC distributor, the area of cross-section of the outer conductors is $10\text{ mm}^2$. What is the area of cross-section of the neutral conductor?
A 200 V DC shunt motor, with armature resistance of 1 Ω, takes an armature current of 50 A at rated torque and runs at 1000 rpm. What resistance must be put in series with the armature to obtain rated torque at starting?
A 132-kV transmission line has a sag of 10 m between two level supports when the length of span is 200 m. If the span is increased to 400 m, then what will be the sag?
The magneto motive force produced in a current carrying coil of 100 turns is 1000 AT. What is the current flowing through the coil?
What is the input resistance of the transistor if a change of 100 mV in the base-emitter voltage causes a change of 50 μA in the base current?
A NPN transistor has a current amplification factor of 0.98. What is its emitter current and base current amplification factor when the base current is 10 μA?
An analogue voltmeter has a linear scale of 500 divisions. Its full-scale reading is 100 V. What is the resolution of the meter, if one-fourth of a division can be read accurately?
The ratio of the number of turns in the HV winding to the number of turns in the LV winding of a single-phase transformer is 10. What is the equivalent resistance of the transformer referred to the HV side if the resistance of the HV and LV windings are 1.5 $\Omega$ and 0.05 $\Omega$ respectively?
In a three-wire DC distribution system, what will be the current in the neutral wire if the load on the positive side is 500 A and on the negative side is 300 A?
What is the execution time of an instruction that requires a machine cycle of four T-states with a clock frequency of 2 MHz?
A piezo-electric type accelerometer has a sensitivity of 100 mV/g. The transducer is subjected to a constant acceleration of 5 g. What will be the steady state output of the transducer?
An AC voltage of $20\sin(314t)$ is connected in series with a silicon diode and a load resistance of 98 $\Omega$. The forward resistance of the diode is 2 $\Omega$. What is the peak current through the diode?
In the circuit shown here, what will be the voltmeter reading if the resistance of the voltmeter is $1000\;\Omega$?
In a two-wire DC transmission system with one conductor earthed, if the length of the line is doubled, then, the line loss for the same power and transmission voltage:
What is the current running through the diode in the circuit shown here, assuming the diode to be ideal?
A 16-kW, single-phase load at power factor of 0.8 lagging is supplied from a single-phase AC supply. How much reactive power will be drawn from the supply?
A capacitor of $1\;\mu\text{F}$ is connected in series with a 1 $\text{M}\Omega$ resistance and is required to be charged to 80% of the final value. Which relation is correct for the time taken for charging?