Staff Selection Commission** (SSC)** every year conducted written exam for the recruitment of Junior Engines (JE). This year paper for SSC JE was held on **25th May 2014** at various centers in India. This question paper has 100 questions from reasoning and general ability section and 200 questions each from Civil Engg, Mechanical and Electrical Engineering branches.

Here we are sharing SS JE Electrical Engineering paper that you can **download** on your computer.

## SSC JE 2014 Electrical Paper with Answers:

- A stove element draws 15 A when connected to 230 V line. How long does it take to consume one unit of energy?
- 3.45 h
- 2.16 h
- 1.0 h
- 0.29 h

- The R^eq for the circuit shown in figure is

- 14.4Ω
- 14.57Ω
- 15.27Ω
- 15.88Ω

- The SI unit conductivity is
- ohm-m
- ohm/m
- mho-m
- mho/m

- Calculate the voltage drop across 14.5 Ω resistance.

- 14.5V
- 18V
- 29V
- 30.5V

- For the network shown in the figure, the value of current in 8Ω resistor is

- 408A
- 2.4A
- 1.5A
- 1.2A

- A piece of oil soaked paper has been inserted between the plates ·of a parallel plate capacitor. Then the potential. difference between the plates will
- increase
- decrease
- remain unaltered
- become zero

- The current drawn by a tungsten filament lamp is measured by an ammeter. The ammeter reading under steady state condition will be………………………… the ammeter reading when the supply is switched on.
- same as
- less than
- greater than
- double

- Tesla is same as
- Weber/meter
- Weber/(meter)²
- Farad/meter
- Henry/(meter)²

- The unit of volume resistivity is
- ohm-m³/m²
- ohm-m²
- ohm-gram-m/gram
- ohm-m^4/m³

- Four resistances 2 Ω, 4 Ω, 5 Ω, 20 Ω are connected in parallel. Their combined resistance is
- 1Ω
- 2Ω
- 4Ω
- 5Ω

- In the figure, the value of R is

- 2.5Ω
- 5.0Ω
- 7.5Ω
- 10.0Ω

- Power consumed in the given circuit is

- 100 watts
- 5 watts
- 20 watts
- 40 watts

- A 200 W, 200 V bulb and a 100 W, 200 V bulb are connected in series and the voltage of 400 V is applied across the series connected bulbs. Under this condition
- 100 W bulb will brighter then 200 W bulb
- 200 W bulb will brighter then 100 W bulb
- Both the bulbs will have equal brightness
- Both the bulbs will be darker than when they are connected across reted voltage

- I the network shown, if one of 4 Ω resistances is disconnected, when the circuit is active, the current flowing now will

- increase very much
- decrease
- be zero
- increase very slightly

- For the circuit shown m figure, when V^s = 0, I = 3 A. When V^s= 200 V, what will be the value of I ?

- -4A
- -1A
- 1A
- 7A

- For the linear circuit shown in figure,

when R = ∞, V = 20 V;

when R = 0, I= 4 A;

when R = 5 Ω the current I is

- 1 A
- 2 A
- 3 A
- 4 A

- The current I in the circuit shown in the figure is

- -3.67 A
- -1 A
- 4 A
- 6 A

- In the network shown in the figure, the value of R^L such that maximum possible power will be transferred to R^L is

- 5.76Ω
- 6.0Ω
- 10.0Ω
- 15.0Ω

- A resistance R is measured by ammeter – voltmeter method. The voltmeter reading is 200 V and its internal resistance is 2 K. If the ammeter reading is found to be is 2 A, then value of R is

- 105.3 Ω
- 100.0 Ω
- 95.3 Ω
- 90.3 Ω

- The circuit shown in the given figure is equivalent to a load of

- 4/3Ω
- 8/3Ω
- 4Ω
- 2Ω

- The north pole of a magnet is moved away from a metallic ring. The induced current in the ring flows
- clock wise
- anticlockwise
- first anticlockwise and then clockwise
- first clockwise and then anticlockwise

- Energy stored in an inductor is given by

- A coil with a certain number of turns has a specified time constant. If the number of turns is doubled, its time constant would
- remain unaffected
- become double
- become four-fold
- get halved

- Hysteresis is the phenomenon in the magnetic circuit by which
- H lags behind· B
- B lags behind H
- B and Hare always same
- setting up a constant flux is-done

- The flux through each turn of a 100-turn coil is (t3 – 2t) m Wh, where ‘t’ is is seconds. Find the magnitude of the induced emf at t = 2 s.
- 1V
- 0.8V
- 0.4V
- 0.2V

- A circuit has inductance of 2 H. If the · circuit current changes at the rate of 10 A/sec, then self- induced emf is
- 5V
- 0.2V
- 20V
- 10V

- The B-H curve for ______ will be a straight line passing through the origin.
- air
- soft iron
- hardened steel
- silicon steel

- Magnetic lines of force coming from a magnet
- intersect at infinity
- intersect within the magnet
- cannot intersect at all
- cancel at pole faces

- The main advantage of temporary magnets is that we can
- change the magnetic flux
- use any magnetic material
- decrease the hysteresis loss
- magnetize without any source

- The magnetic material used in permanent magnets is
- iron
- soft steel
- nickel
- hardened steel

- For the circuit shown in figure, the voltage across the capacitor during steady state condition is

- 0 V
- 4 V
- 6 V
- 12 V

- A current of 5 mA flows in a resistaneless choke from a 200 V alternating source. The energy consumed in the choke is.
- 0J
- 4.4J
- 500 J
- 1000 J

- Find R ^ ab for the circuit shown in figure.

- 18Ω
- 30Ω
- 45Ω
- 68Ω

- Calculate the total susceptance of the circuit shown in figure.

- The Q-factor of a parallel resonant circuit is given dy

- In an R-;L series circuit, the phase difference between applied volt.age and circuit current will increase if
- X^L is increased
- R is increased
- X^L is decreased
- supply frequency is decreased

- A series circuit has R =..4 Ω, X^L= 12 Ω and X^c = 9Ωand is supplied with 200 V, 50 Hz. Calculate the power.
- 6400W
- 8000W
- 14,400W
- 19,200W

- Two sinusoidal currents are given by the equations (Image….) The phase difference between them is _____ degrees.
- 15
- 30
- 45
- 75

- The reactance of 1 farad capacitance when connected to a DC circuit is
- infinite
- 1Ω
- 0.5Ω
- zero ohms

- A supply voltage of 230 V, 50 Hz is fed to a residential building. Write down its equation for instantaneous value.
- 163 sin 314·16 t
- 23o” sin 314·16 t
- 325 sin 314·16 t
- 361sin314·16 t

- The AC bridge used for measurement of dielectric loss of capacitor is
- Anderson bridge
- Schering bridge
- Wien bridge
- Hay’s bridge

- In electrodynamometer ammeter the deflection of the pointer is proportional to
- mean of currents in fixed coil and moving coil
- square of the current in moving coil
- RMS value of current in fixed coil
- mean-square of currents in and moving coil

- In which of the following transformers, is the secondary winding always kept closed?
- Current transformer
- Potential transformer
- Power transformer
- Distribution transformer

- Two holes are drilled in the disc on a diameter of energy-meter to
- increase ventilation
- reduce the weight of disc
- eliminate creeping on no-load
- increase deflecting torque·

- Which of the following instruments has the highest torque/weight ratio among the given instruments ?
- Attraction type MI instrument
- Repulsion type MI instrument
- Permanent magnet moving coil instrument
- Electrodynamometer instrument

- If current through the operating coil of a moving iron instrument is doubled, the operating force becomes
- one and a half times
- 2 times
- 3 times
- 4 times

- In moving iron instruments, the iron moves in a direction to cause
- coil inductance to be constant
- mutual inductance to be minimum
- minimum reluctance path
- decrease in the flu.x passing through it

- A moving· coil instrument has a resistance of 10Ω and gives full scale deflection at 0·5 V potential difference across it. How can it be adapted to measure a current up to 100 A?
- By connecting shunt resistance of 0.005Ω across the meter
- By connecting shunt resistance of 0.05Ω across the meter
- By connecting shunt resistance of 5Ω across the meter
- By connecting shunt resistance of 10Ω across the meter

- The multiplying power of the shunt of a mill ammeter is 8.If the circuit current is 200 mA, then current through the meter is
- 25 mA
- 200mA
- 1600mA
- 3200mA

- The material to be used in the manufacture of a standard resistor should be of
- low resistivity
- high resistivity and low temperature coefficient
- high temperature coefficient
- low resistivity and high temperature coefficient

- In a 3- phase induction motor crawling happens at
- any speed
- no- load speed
- odd multiples of fundamental
- even multiples of fundamental

- A 4-pole, 3-phase induction motor runs at 1440 rpm on a 50 Hz supply. Find the slip speed.
- 2940 rpm
- 1500 rpm
- 1440 rpm
- 60 rpm

- Low voltage windings are placed nearer to the core in the case of concentric windings because
- it reduces hysteresis loss
- it reduces eddy current loss
- it reduces insulation requirement
- it reduces leakage fluxes

- If K is the phase-to-phase voltage ratio, then the line-to-line voltage ratio in a 3-phase Y – ∆ transformer is
- K
- K/√3
- √3 K
- √3/K

- In an autotransformer of voltage ratio In an autotransformer of voltage ratio (V^1/V^2) (V1^>V^2) the fraction of power transferred inductively is proportional to

- Stepped core is used in transformers in order to reduce .
- volume of iron
- volume of copper
- iron loss
- reluctance of core

- Commutation conditions at full load for large DC machines can be efficiently checked by the
- Brake test
- Swinburne’s test
- Hopkinson’ test
- Field test

- The emf induced in a DC shunt generator is 230 V. The armature resistance is 0.1 Ω. If the armature current is 200 A, the terminal Voltage will be
- 200 V
- 210 V
- 230 V
- 250 V

- The commentator of a DC generator acts as
- an amplifier
- a rectifier
- a load
- a multiplier

60. Fleming’s left hand rule is applicable to

- DC generator
- DC motor
- Alternator
- Transformer

61. Which of the following single phase motors is available with speed as low as one revolution per minute?

- Universal
- Shaded pole
- Reluctance
- Hysteresis

62. A vacuum cleaner employs___________ motor.

- resistance split phase
- capacitor start
- shaded pole
- single phase series

63. In capacitor start, single phase induction motor, the current in the

- supply lines leads the voltage
- starting winding lags the voltage
- main winding leads the voltage
- starting winding leads the voltage

64.In a single phase induction motor, speed sensitive centrifugal switch i$ connected in________________ winding.

- parallel with main
- series with main
- parallel with starting
- series with starting

65. At starting, the current through the starting winding (I^s) of single phase induction motor

- lags ‘V’ by 90°
- leads ‘V’ by 90°
- is nearly in phase with ‘V’
- leads ‘V’ by 75°

66. In a single phase induction motor at start, the two revolving fields. Produce

- unequal torques in the rotor conductors

- no torque in the rotor conductor
- equal and opposite torques in the rotor conductors
- equal torques in same direction in the rotor conductors

- A synchronous motor can be used as synchronous condenser when it is
- over excited
- over loaded
- under excited
- under loaded

- Which one of the following methods would give a higher than actual value of regulation of an alternator?
- ZPF method
- MMF method
- EMF method
- ASA method

- If the excitation of an alternator operating in parallel with other alternator is increased above the normal value of excitation, its
- power factor becomes more lagging
- power factor becomes more leading
- output current decreases
- output kW decreases

- In an alternator, the effect of armature reaction is minimum at power factor of
- 0.5 lagging
- 0.866 lagging
- 0.866 leading
- unity

- Damper winding in synchronous motors is used to
- suppress hunting
- improve power factor
- develop reluctance torque
- improve the efficiency

- Turbo alternators have rotors of
- small diameter and long axial length
- large diameter and long axial length
- large diameter and small axial length
- small diameter and small axial length

- Which of the following equipment’s is used to limit short-circuit current level in a sub-station?
- Isolators
- Lightning switch
- Coupling capacitor
- Series reactor

- Power distribution by cable is generally adopted for line length
- less than 10 km
- above 10 km
- less than 50 km
- above 50 km

- The leakage resistance of a 50 km long cable is 1 MΩ For a 100 km long cable it will be
- 0.5MΩ
- 2MΩ
- 0.66 MΩ
- None of these

- If voltage is increased by ‘n’ times, the size of the conductor would
- increase by ‘n’ times
- reduce by ‘1/n’ times
- increase by ‘n²’ times
- reduce by ‘1/n²’ times

- The maximum demand of a consumer is 2 kW and his daily energy consumption is 24 units.

His load factor is _____________ %.- 24
- 41.6
- 50
- 80

- A wire placed on the top of a transmission line acts as
- a phase wire
- neutral
- a transmission wire
- ground wire

- The conductor, by means of which the metal body of an equipment or an application is connected to the earth, is known as
- Neutral continuity conductor
- Earth discontinuity conductor
- Earth continuity conductor
- Neutral discontinuity conductor

- Which insulation is most widely used for covering wires/cables used in internal wiring?
- Paper
- Wood
- Glass
- PVC

- Which of the following types of wiring is preferred for workshop lighting?
- Casing-Capping wiring
- Batten wiring
- Concealed conduit wiring
- Surface conduit wiring

- The earthling electrodes should be placed within what distance in metres from the building whose installation system is being earthed?
- 4
- 2.5
- 1.5
- 0.5

- Supplier’s fuse, which is provided in domestic wiring system is
- after the energy meter
- before the energy meter
- before distribution board
- after main switch

- As per recommendation of ISI, the maximum number of points of lights, fans and socket outlets that can be connected in one sub-circuit is
- 8
- 10
- 15
- 20

- In a 3-pin plug
- all the three pins are of the same size
- two pins are of the same size but third one is thicker
- two pins are of the same size but third one is thicker and longer
- all the three pin~ are of different sizes

- The acceptable Value of grounding resistance to domestic application is ·
- 0.1Ω
- 1Ω
- 10Ω
- 100Ω

- Inside the earth. pit, the ear thing electrode should be placed
- vertical
- horizontal
- inclined at 45°
- inclined at any angle other than 45°

- To reduce the cost of the electricity generated
- the load factor and diversity factor must be low
- the load must be low but diversity factor high
- the load factor must be high but diversity factor low
- the load factor and diversity factor must be high

- The colour of the light given out by a sodium vapour discharge lamp is
- pink
- bluish green
- yellow
- blue

- The transformer used in a welding set is
- step-up transformer
- step-down transformer
- constant current transformer
- booster transformer

- The domestic load that has UPF is
- Fan
- Mixer
- Tube
- Filament lamp

- An industrial consumer has a daily load pattern of 2000 kW, 0.8 lag for 12 hours and 1000 km UPF for 12 hours. The load factor is
- 0.5
- 0.75
- 0.6
- 2.0

- Dielectric loss is proportional to
- [frequency]^1/2
- frequency
- frequency²
- frequency³

- Which of the following applications needs frequent starting and stopping of electric motor?
- Air-conditioner
- Lifts and hoists
- Grinding mill
- Paper mill

- In a CE (common emitter) transistor, Vcc =12 V and the signal collector current is 1 mA. Determine the operating point when collector load (Rc) is 6 kΩ
- 6 V, 1 mA
- 6 V, 2 mA
- 12 V, 1 mA
- 12 V, 2 mA

- An AC supply of 230 V is applied to half-wave rectifier through transformer of turns ratio 10: 1 as shown in figure. Determine the peak inverse voltage across the diode.

- 37.6 V
- 32.5 V
- 23.0 V
- 14.54 V

- The potential barrier existing across pn junction
- prevents flow of minority carriers
- prevents flow of majority carriers
- prevents total recombination of holes and electrons
- prevents neutralisation of acceptor and donor ions

- The technique of adding a precise amount of time between the trigger point and the beginning of the scope sweep in a CRO is known as
- Free running sweep
- Delayed sweep
- Triggered sweep
- Non-saw tooth sweep

- Is a CRO, a sinusoidal waveform of a certain frequency is displayed. The value of the quantity that can be made out by observation is
- RMS value of the sine wave
- average value of the sine wave
- form factor of the sine wave
- peak-peak value of the sine wave

- In a Cathode Ray Tube, the. Focussing anode is located
- after accelerating anode
- Between. pre-accelerating and accelerating anodes
- before pre-accelerating anode
- just after electron-gun

Don’t make fool, it is unsolved paper with no diagram for question if you can’t provide the solution don’t ever use in tittle