SSC JE Electrical Engineering 2012

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For the following questions answer them individually
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Two statements are given followed by two conclusions I and II. You have to consider the statements to be true even if they seem to be at variance from commonly knownfacts. You
are to decide which of the given conclusions, if any, follow from the given statments.

SSC JE Electrical Engineering 2012 - Question 4

Statements:
Mind is a stream of thoughts.
Mind is working all the time.
Conclusions:
I: If there is no thought, there is no mind.
II: Thoughtless people will not succeed.

SSC JE Electrical Engineering 2012 - Question 5

Statements:
Teachers should have empathy.
Students need empathetic approach from their teachers.

Conclusions:
I: Persons without empathy cannot become good teachers.
II: Good teachers understand the problems of their students.

For the following questions answer them individually
SSC JE Electrical Engineering 2012 - Question 10

A word is represented by only one set of numbers as given in any one of the alternatives. The sets of numbers given in the alternatives are represented by two classes of alphabets as in two matrices given below. The columns and rows of matrix I and II are numbered from 0 to 4.A letter from these matrices can be represented first by its row and next by its column,e.g., ‘A’ can be represented by 24, 31 etc. and ‘P’ can be represented by 11, 32, etc. Identify the set for the letters AELO.

Select the related word/letter /number/figure from the given alternatives.

Select the one which is different from the other three responses.

For the following questions answer them individually
SSC JE Electrical Engineering 2012 - Question 30

Arrange the following wordsin the orderin which they occur in the dictionary. Which will appear fourth in the dictionary ?

SSC JE Electrical Engineering 2012 - Question 31

Arrange the following words in the orderin which they occurin the Dictionary :
1. Interview
2. Inventory
3. Invention
4. Interval
5. Investment

Choose the correct alternative from the given responses that will complete the series:

For the following questions answer them individually
SSC JE Electrical Engineering 2012 - Question 39

₹ 6,500 were divided equally among a certain number of persons. Had there been 15 more persons, each would have got ₹ 30 less. Find the original numberof persons.

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SSC JE Electrical Engineering 2012 - Question 44

If $$+$$ stands for division
$$-$$ stands for equai to
$$\times$$ stands for addition
$$\div$$ stands for greater than
$$=$$ standsfor less than
$$>$$ stands for multiplication
$$<$$ stands for subtraction
then of the given alternatives which one is correct?

Select the missing number from the given responses.

For the following questions answer them individually
SSC JE Electrical Engineering 2012 - Question 48

Going 60 metresto the South of his house, Kiran turns left and goes another 20 metres then turning to the North, he goes 40 metres and then starts walking to his house. In which direction is his house. In which direction is his house from there ?

SSC JE Electrical Engineering 2012 - Question 49

Ram started walking towards East. After 1 km, he turned South and walked 5 km. Again he turned East and walked 2 km. Finally, he turns to the North and walked 9 km. How faris he from the starting point ?

SSC JE Electrical Engineering 2012 - Question 57

A prototype of a system is

SSC JE Electrical Engineering 2012 - Question 61

Repeated exposure to small concen-trations of a toxic agent results in accu-mulation of toxic substance over a period of time. This is known as

SSC JE Electrical Engineering 2012 - Question 69

Which one of the following famous mon-uments was built to honour the visit of King George V and Queen Mary to India ?

SSC JE Electrical Engineering 2012 - Question 74

Precipitation takes place when product of concentration of ions

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SSC JE Electrical Engineering 2012 - Question 101

Which one of the following is correct ?

SSC JE Electrical Engineering 2012 - Question 102

A lap wound DC generator having 250 armature conductor runs at 1200 rpm. If the generator emf is 200 V, then the operating flux of the DC generator is

SSC JE Electrical Engineering 2012 - Question 104

The direction of rotation of a DC shunt motor can be reversed by interchanging

SSC JE Electrical Engineering 2012 - Question 106

Based on revolving field theory, the forward and backward frequencies of the rotor emf of a 4-pole, 50 Hz, single-phase induction motor when running at 1300 rpm in the same direction of the forward field are respectively

SSC JE Electrical Engineering 2012 - Question 107

Three lamps are in circuit as shown in figure. At what condition 100 W lamp will have the maximum brightness?

SSC JE Electrical Engineering 2012 - Question 108

Given two coupled inductors $$L_1$$ and $$L_2$$ having their mutual inductance M. The relationship among them must satisfy

SSC JE Electrical Engineering 2012 - Question 109

If the length of a bar of magnetic material is increased by 20% and the cross-sectional area is decreased by 20% then the reluctance is

SSC JE Electrical Engineering 2012 - Question 111

A coil with a certain number of turns has a specified time constant. If the number of turns is doubled, its time constant would

SSC JE Electrical Engineering 2012 - Question 112

The iron loss per unit frequency in a ferromagnetic core, when plotted against frequency, is a

SSC JE Electrical Engineering 2012 - Question 113

The mutual inductance between two closely coupled coils is 1 H. If the turns of one coil is decreased to half and those of the other is doubled, the new value of the mutual inductance would be

SSC JE Electrical Engineering 2012 - Question 114

Following graph shows the loss characteristics of a sheet of ferromagnetic material against varying frequency f. $$P_i$$ is the iron loss at frequency f, Hysteresis and eddy current losses of the sheet at 100 Hz are

SSC JE Electrical Engineering 2012 - Question 115

Hysteresis losses are present in iron core coil when

SSC JE Electrical Engineering 2012 - Question 117

Two inductors have self inductances of 9 mH and 25 mH. The mutual inductance between the two is 12 mH. The coefficient of inductive coupling between the two inductors is

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SSC JE Electrical Engineering 2012 - Question 123

Slip of a 3-phase induction motor may be expressed as

SSC JE Electrical Engineering 2012 - Question 124

The emf induced per phase in a three phase star connected synchronous generator having the following data
Distribution factor = 0.955
Coil-span factor = 0.966
Frequency = 50 Hz
Flux per pole = 25 mwb
Turns per phase = 240
emf per phase is

SSC JE Electrical Engineering 2012 - Question 127

In an auto-transformer, the number of turns in primary winding is 210 and in secondary winding is 140. If the input current is 60 A, the currents in output and in common winding are respectively

SSC JE Electrical Engineering 2012 - Question 128

A 3-phase transformer has its primary connected in delta and secondary in star. Secondary to primary turns ratio per phase is 6. For a primary voltage of 200 V, the secondary voltage would be

SSC JE Electrical Engineering 2012 - Question 129

A resistance and another circuit element are connected in series across a DC voltage V. The voltage across the second element is V initially and zero after time. The other element is pure

SSC JE Electrical Engineering 2012 - Question 131

A series R-L-C circuit resonates at 1 MHz. At frequency 1.1 MHz the circuit impedance will be

SSC JE Electrical Engineering 2012 - Question 133

Application of Thevenin’s Theorem in a circuit results in

SSC JE Electrical Engineering 2012 - Question 134

A current of $$i = 6 + 10 \sin (100 \pi t) + 20 \sin (200 \pi t)$$ is flowing through a series combination of a PMMC and moving iron instrument. Ratio of the two currents as registered by the M.I. and PMMC meter is

SSC JE Electrical Engineering 2012 - Question 136

A 120 V, 60 W incandescent lamp has to be operated from 220 V, 50 c/s, 1-phase AC supply. In order to do this, a circuit element has to be connected in series with the lamp. Which one of the following series element is preferable ?

SSC JE Electrical Engineering 2012 - Question 138

For balanced 3-phase supply system, the phasor sum of the line currents is NOT zero if the load is

SSC JE Electrical Engineering 2012 - Question 139

At series resonance of an ac R-L-C circuit the impressed voltage is

SSC JE Electrical Engineering 2012 - Question 140

In a series RLC circuit R = 20 Ω , $$X_L = 30$$ Ω and $$X_c = 30$$ Ω If the supply voltage across the combination is $$v = 100 \sin (100 \pi t + 30^\circ)$$ volts, the instantaneous current and the power factor of the circuit are respectively

SSC JE Electrical Engineering 2012 - Question 143

In a balanced 3-phase system, the current coil of a wattmeter is inserted in line 1 and the potential coil across 2 and 3. If the wattmeter reads 100 W, the reactive power drawn by the 3-phase load is

SSC JE Electrical Engineering 2012 - Question 145

A non-sinusoidal periodic waveform is free from DC component, cosine components and even harmonics. The waveform has

SSC JE Electrical Engineering 2012 - Question 146

A periodic train of rectangular pulses x(t) with a time period of 25 seconds, has a pulse width of 9 seconds as shown in figure. The RMS value of the waveform is

SSC JE Electrical Engineering 2012 - Question 148

In the series RC circuit, the voltage across C starts increasing, the moment the circuit is switched to V volts DC. The rate of increase of voltage across C at the instant just after the switch is closed (i.e. at $$t = 0^{+}$$) is

SSC JE Electrical Engineering 2012 - Question 149

Form factor of an alternating wave is

SSC JE Electrical Engineering 2012 - Question 150

The phase difference between the following voltage and current waves $$v = 311 \sin (100 \pi t + 30^\circ)$$ Volts $$i = 17 \sin (100 \pi t - 20^\circ)$$ Amps is

SSC JE Electrical Engineering 2012 - Question 151

Match the items given in List-I (Material) and those in List-II (Temperature Coefficient of Resistance). Select your answers using codes given in the lists

SSC JE Electrical Engineering 2012 - Question 154

A $$10 \mu F$$ and a $$20 \mu F$$ capacitor are in series. The combination is supplied at 150 V from a sinusoidal voltage source. The voltage across the $$20 \mu F$$ capacitor is then

SSC JE Electrical Engineering 2012 - Question 155

The conditions at which the following potential divider is independent of frequency, may be

(i) $$\frac{R_1}{R_2} = \frac{C_1}{C_2}$$
(ii) $$\frac{R_1}{R_2} = \frac{C_2}{C_1}$$
(iii) $$R_1C_1 << 1, R_2C_2 << 1$$
(iv) $$R_1 + R_2 = \frac{1}{C_1} + \frac{1}{C_2}$$

SSC JE Electrical Engineering 2012 - Question 159

Two wires A and B of the same material but of different lengths L and 2L have the radius r and 2r respectively. The ratio of specific resistance will be

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SSC JE Electrical Engineering 2012 - Question 160

A 20 micro farad capacitor is connected across an ideal voltage source. The current in the capacitor

SSC JE Electrical Engineering 2012 - Question 162

In the given circuit the function of the diode D is

SSC JE Electrical Engineering 2012 - Question 164

In the circuit forward resistance of the diode D is 2 Ω and its reverse resistance is infinitely high

A list consists of meters (List-I) and another list shows, the meter readings (Lis-II)

Which one of the options given here is correct to indicate the type of meter (List-I) and its reading (List-II)

SSC JE Electrical Engineering 2012 - Question 165

In the figure. D in an ideal diode. If the rms value of the input voltage is 50V, then the rms current through 100 Ω is

SSC JE Electrical Engineering 2012 - Question 167

In a rectifier circuit, the primary function of the filter is to

SSC JE Electrical Engineering 2012 - Question 169

A pure sinusoidal current is being rectified. For the given maximum value of sinusoidal current if rms value of half wave rectified current is 50 A, then the rms value of full wave rectification will be

SSC JE Electrical Engineering 2012 - Question 172

Alternator used in hydel power station has more number of poles in it than used in thermal power station, because

SSC JE Electrical Engineering 2012 - Question 174

In a thyrite lightning arrester the resistance

SSC JE Electrical Engineering 2012 - Question 175

A consumer is offered the following rate of tariff. He has to pay a fixed charge of Rs. 1,000 per month and a running charge of Rs. 4.50 per unit consumed. If the consumer runs a motor load of 1kW at 0.85 power factor lagging on an average of 15 hours per day, his annual bill is

SSC JE Electrical Engineering 2012 - Question 180

In AC operated electromechanical contractors, the problem of chattering is eliminated by

SSC JE Electrical Engineering 2012 - Question 183

An AC meter of resistance $$R_m$$ and resistance $$X_m$$ is connected in series with a resistance $$R_s$$. A shunt of impedance $$(R_{sh} + jX_{sh})$$ is applied in parallel to the existing combination of meter and $$R_s$$. The current division across the two branches will be independent of frequency when

SSC JE Electrical Engineering 2012 - Question 184

In phantom loading arrangement, energy consumption in the calibration test of wattmeter is reduced because of

SSC JE Electrical Engineering 2012 - Question 185

In the measurement of power in a balanced 3 - phase circuit bt two-wattmeter method if the two wattmeters show equal readings, then the power factor of the circuit is

SSC JE Electrical Engineering 2012 - Question 186

Two meters X and Y required 40mA and 50mA respectively for fully scale deflection. Then

SSC JE Electrical Engineering 2012 - Question 188

A Ballistic galvanometer of constant equal to 1 micro-coulomb/degree gives a throw of $$22.5^\circ$$, when a capacitor discharges through the meter. If a battery of 15V is used to recharge the capacitor, value of capacitance is

SSC JE Electrical Engineering 2012 - Question 189

A potentiometer is used to measure the voltage between two points of a DC circuit, which is found to be 1.2V. This is also measured by a voltmeter, which is found to be 0.9V. The resistance of the volt meter is 60 kΩ. The input resistance between two points

SSC JE Electrical Engineering 2012 - Question 190

A load is connected to supply. A current transformer (CT), and a potential transformer (PT) is used in between load and supply. A power factor of 0.5 is measured at the secondary side of CT and PT . If phase angle error of CT and PT are $$0.4^\circ$$ and $$0.7^\circ$$, power factor of the load is

SSC JE Electrical Engineering 2012 - Question 191

During the measurement of a low resistance using a potentiometer, the following readings were obtained: Voltage drop across unknown resistance = 0.531V. Voltage drop across a 0.1Ω standard resistance connected in series with the unknown = 1.083V. Value of the unknown resistor is

SSC JE Electrical Engineering 2012 - Question 194

In star-delta starting of three-phase induction motor the starting voltage is reduced to

SSC JE Electrical Engineering 2012 - Question 195

An electromagnetic torque is produced as an interaction between a flux and current. The angle between flux and current is $$45^\circ$$. If this angle is change to 30, flux increases by 100% and current reduces by 25%, then the torque

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SSC JE Electrical Engineering 2012 - Question 199

If the starting torque of a 3-phase induction motor is $$T_{st}$$ for DOL starting, that star-delta starting of the motor is

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