# SSC JE 11 Oct 2023 PAPER I Electrical Part 5

## SSC JE 11 Oct 2023 PAPER I Electrical Part 5

SSC JE 11 Oct 2023 PAPER I Electrical Part 5

Q.1 The type of armature winding used in large high-voltage alternators is:

1. wave winding
2. concentric winding
3. two layer winding
4. lap winding

Correct Option: 2

Q.2 What inductance would be needed to store 2kWh of energy in a coil carrying a 100A current?

1. 0.4 H
2. 1440 H
3. 4 H
4. 100 H

Correct Option: 2

Q.3 In case of circuit laws, the currents flowing in various conductors in an electrical circuit are calculated by applying _____.

1. Kirchhoff’s law
2. the direct method
3. Laplace’s law
4. the network reduction method

Correct Option: 1

SSC JE 11 Oct 2023 PAPER I Electrical Part 5

Q.4 What is the apparent power of a 3-phase, star-connected system with a line voltage of 200 V and a line current of 20 A? The phase difference between the voltage and the current is 36.87°.

1. 8.928 kVA
2. 5.928 kVA
3. 7.928 kVA
4. 6.928 kVA

Correct Option: 4

Q.5 If a current varies periodically from zero to maximum, back to zero and then repeats, the signal is a:

1. pulsating signal
2. sinusoidal signal
3. constant signal
4. direct signal

Correct Option: 1

SSC JE 11 Oct 2023 PAPER I Electrical Part 5

Q.6 A coil consists of 1000 turns having a cross-sectional area of 0.4 mm2 . The mean length per turn is 40 cm and the resistivity of the wire is 0.02μΩ-m. The resistance of the coil is _______.

1. 200Ω
2. 40Ω
3. 20µΩ
4. 20Ω

Correct Option: 4

Q.7 A wind turbine with a rotor diameter of 60 m is installed in an area with an average wind speed of 4 m/s. Find the wind power density in watts per square metre, assuming that the air density in the area is 1.5 kg/m3.

1. 135.67 KW/m2
2. 736.45 KW/m2
3. 542.6 KW/m2
4. 271.3 KW/m2

Correct Option: 4

SSC JE 11 Oct 2023 PAPER I Electrical Part 5

Q.8 What is the purpose of interleaving the windings in a transformer?

1. To increase the leakage flux
2. To increase the inductance of the transformer
3. To reduce the leakage flux
4. To reduce the efficiency of the transformer

Correct Option: 3

Q.9 In an AC circuit, the peak voltage is 388 V. Its effective voltage is:

1. 275 V
2. 200 V
3. 230 V
4. 300 V

Correct Option: 1

SSC JE 11 Oct 2023 PAPER I Electrical Part 5

Q.10 Which sort of contract requires contractors to provide individual price quotes for all work to be performed?

1. Lump sum contract
2. Percentage rate contract
3. Item rate contract
4. Schedule rate contract

Correct Option: 3

Q.11 What is the magnetising current of a transformer?

1. The current drawn by the secondary winding when a load is connected.
2. The current drawn by the primary winding when the secondary is on open circuit.
3. The current flowing through the insulation between the primary and secondary windings.
4. The current flowing through the ferromagnetic core.

Correct Option: 2

Q.12 In a metal filament bulb, the filament used as a heating coil is tungsten due to its _____.

1. low melting point and low resistivity
2. high melting point and low resistivity
3. low melting point and high resistivity
4. high melting point and high resistivity

Correct Option: 4

SSC JE 11 Oct 2023 PAPER I Electrical Part 5

Q.13 What is the charging current per phase of a three-core underground cable connected to 22 kV, 50 Hz three phase supply? Given that the capacitance of each phase to neutral is 18 µF. (Given the connection is star connected.)

1. 71.82 A
2. 84.45 A
3. 50 A
4. 82.13 A

Correct Option: 1

Q.15 Which of the following lamps is suitable for highway lighting?

1. Fluorescent lamp
2. Sodium vapour light
3. Neon lamp
4. Incandescent lamp

Correct Option: 2

SSC JE 11 Oct 2023 PAPER I Electrical Part 5

Q.16 In a PMMC instrument, if the controlling torque is too high, what effect will it have on the accuracy of the instrument?

1. The instrument will stop working.
2. The accuracy of the instrument will increase.
3. The accuracy of the instrument will remain unaffected.
4. The accuracy of the instrument will decrease.

Correct Option: 4

Q.17 Find the ripple frequency of half wave rectifier if the input operating frequency is 50 Hz.

1. 25 Hz
2. 500 Hz
3. 100 Hz
4. 50 Hz

Correct Option: 4

SSC JE 11 Oct 2023 PAPER I Electrical Part 5

Q.18 Three identical coils connected in delta to a 415 V, 3-phase supply take a total power of 50 kW and line currents of 70 A. Determine the total kVA taken by the coils.

1. 23.24 kVA
2. 50.32 kVA
3. 9.68 kVA
4. 16.77 kVA

Correct Option: 2

Q.19 Because of their high efficiency and high speed, synchronous motors are well suited for________.

1. mixer grinders
2. blowers
3. ceiling fans
4. electric tractions

Correct Option: 2

SSC JE 11 Oct 2023 PAPER I Electrical Part 5

Q.20 An RLC series circuit has R = 5 Ω and L = 1 H. Which of the following values of capacitance will make this circuit critically damped?

1. 0.08 F
2. 0.30 F
3. 0.20 F
4. 0.16 F

Correct Option: 4

Q.21 The depletion layer capacitance is essentially the capacitance of a _________ p-n junction.

1. saturated
2. reverse-bias
3. forward-bias
4. cut-off

Correct Option: 2

SSC JE 11 Oct 2023 PAPER I Electrical Part 5

Q.22 _________, निविदा के अतिरिक्त लगाया गया (put down) धन है।

1. असल धन (True money)
2. अग्रिम धन (Earnest money)
3. दोहन धन (Exploit money)
4. जमा धन (Deposit money)

Correct Option: 2

Q.23 In Bipolar Junction Transistor, for amplification purposes, emitter-base junction is ____ and collector-base junction is _____ biased.

1. reverse; reverse
2. forward; reverse
3. reverse; forward
4. forward; forward

Correct Option: 2

Q.24 In electromagnetism, the pattern of the magnetic field in a solenoid is ______.

1. of curved lines
2. circular
3. of parallel straight lines
4. of perpendicular lines

Correct Option: 3

SSC JE 11 Oct 2023 PAPER I Electrical Part 5

Q.25 Which of the following is NOT a type of Field Effect Transistor?

1. Depletion MOSFET
2. JFET
3. Enhancement MOSFET
4. Thyristor

Correct Option: 4

SSC JE 11 Oct 2023 PAPER I Electrical Part 5

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