SSC JE 10 Oct 2023 PAPER I Electrical Part 5

SSC JE 10 Oct 2023 PAPER I Electrical Part 5

SSC JE 10 Oct 2023 PAPER I Electrical Part 5

SSC JE 10 Oct 2023 PAPER I Electrical Part 5

Q.1 What will be the primary current of a 20 kVA, 6600/220 V, 50 Hz step-down ideal transformer?

1. 1.3 A
2. 0 A
3. 3.03 A
4. 1.515 A

Correct Option: 3

Q.2 A capacitor that stores energy of 8 J and has capacitance of 1 F has a potential difference of ______ across it.

1. 4 V
2. 2 V
3. 12 V
4. 1 V

Correct Option: 1

Q.3 The no load ratio of a 50 Hz single-phase transformer is 2000/200 V. The maximum flux in the core is 0.05 Wb. What is the approximate number of primary turns?

1. 200 turns
2. 180 turns
3. 145 turns
4. 100 turns

Correct Option: 2

SSC JE 10 Oct 2023 PAPER I Electrical Part 5

Q.4 When one tenant re-lets space to another under the terms of their own lease, it is called __________________.

1. sublease
2. perpetual lease
3. occupational lease
4. building lease

Correct Option: 1

Q.6 What will happen with a single-phase induction motor that has a short-circuited capacitor?

1. Will run
2. Will run in the reverse direction
3. Will run in the same direction with less speed
4. Will not run

Correct Option: 4

SSC JE 10 Oct 2023 PAPER I Electrical Part 5

Q.8 In electromagnetic induction, according to Fleming’s right-hand rule, the forefinger represents ______.

1. direction of the induced EMF
2. direction of the magnetic field
3. direction of the induced current
4. direction of the motion of the conductor

Correct Option: 2

SSC JE 10 Oct 2023 PAPER I Electrical Part 5

Q.11 Which option is INCORRECT in relation to the applications of synchronous motors?

1. They are used to regulate the voltage at the end of transmission line.
2. They are used in power house and substation in parallel to the bus bar to improve the power factors.
3. They are used in factories having a large number of induction motors operated at leading power factor.
4. They are used in large loads where constant speed is required.

Correct Option: 3

SSC JE 10 Oct 2023 PAPER I Electrical Part 5

Q.12 In the wind power plant, which of the following features differentiates the wound rotor synchronous generator from squirrel cage induction generators?

1. A reactive power compensation unit is not needed in wound rotor synchronous generators.
2. A gearbox is not required in the wound rotor synchronous generator.
3. The wound rotor synchronous generator includes an external mechanism to control the rotor output.
4. The wound rotor synchronous generator includes an external mechanism to control the stater side.

Correct Option: 3

Q.13 Which of the following quantities can be changed to control the speed of the brushless DC motor?

1. Temperature
2. Wind pressure
3. Wind direction
4. Applied DC source voltage

Correct Option: 4

Q.16 How many windings are present in auto transformers?

1. 4
2. 2
3. 1
4. 3

Correct Option: 3

SSC JE 10 Oct 2023 PAPER I Electrical Part 5

Q.17 The dual pair of the node and open circuit are ____________

1. mesh and short circuit
2. mesh and KCL
3. mesh and open circuit
4. KVL and short circuit

Correct Option: 1

Q.18 According to IS (Indian Standard) specification 1180-1964 for outdoor type distribution transformer, the tapings shall be provided on hv side in _______.

1. 2 steps
2. 6 steps
3. 5 steps
4. 3 steps

Correct Option: 3

Q.19 Which of the following statements regarding the spinning reserve is/are true? A) It is the reserve capacity which is in operation, but not available for service. B) It acts as a cushion in case of emergency requirements. C) It is a capacity which is always connected to the bus and is used in case of need.

1. A and C
2. B and C
3. A and B
4. Only B

Correct Option: 2

SSC JE 10 Oct 2023 PAPER I Electrical Part 5

Q.20 Identify the FALSE statement associated with the significance of stationary armature in synchronous machine.

1. The stationary armature is a stationary component that does not rotate, making it less prone to wear and tear. This results in a machine that is highly reliable and requires minimal maintenance.
2. The stationary armature is typically housed in a stationary frame, which provides a large surface area for efficient cooling. This allows the armature to operate at high temperatures without overheating, resulting in higher efficiency and longer lifespan.
3. The stationary armature is responsible for producing the stator magnetic field in a synchronous machine. The magnetic field produced by the armature interacts with the magnetic field produced by the rotor to generate the torque necessary to turn the machine.
4. In stationary armature configuration, the exciting current is relatively high; therefore, the slip rings and brush gear need to be heavy construction.

Correct Option: 4

Q.21 Which of the following defines the use of a thermostat in an electric kettle?

1. It is used to stop the flow of electricity through the heating element once the appropriate temperature is reached.
2. It is used to compare the ambient temperature with the temperature inside the kettle.
3. It is used to maintain the temperature inside the kettle.
4. It Is used to reduce the temperature in case of overheating of the heating element.

Correct Option: 1

Q.22 In a shaded-pole induction motor, the part with copper ring is known as ____________, and the copper ring is known as _________, which is usually a single-turn coil.

1. shaded coil; shading coil
2. shaded pole; shading pole
3. shaded coil; shading pole
4. shaded pole; shading coil

Correct Option: 4

SSC JE 10 Oct 2023 PAPER I Electrical Part 5

Q.23 The property where magnetic field of one of the coils makes the other coil to induce an EMF in it is called _______.

1. mutual inductance
2. capacitance
3. resistance
4. self-inductance

Correct Option: 1

Q.24 Which of the following statements are INCORRECT about PMMC instruments?I. The torque-to-weight ratio is high, which gives a high accuracy.II. A single instrument can be used for several, different current voltage ranges by using the instrument transformer.III. The scale is uniformly divided.IV. The cost of PMMC instruments is lower than that of moving iron instruments.

1. Only I and IV
2. Only I and III
3. Only II and IV
4. Only II and III

Correct Option: 3

SSC JE 10 Oct 2023 PAPER I Electrical Part 5

Q.25 Select the INCORRECT statement for an overhead transmission line supported by supports at equal levels.

1. Sag is inversely proportional to the height of the supporting tower.
2. Sag is directly proportional to the square of the length of the conductor span.
3. Sag is inversely proportional to the tension of the conductor.
4. Sag is directly proportional to the weight per unit length of the conductor.

Correct Option: 1

SSC JE 10 Oct 2023 PAPER I Electrical Part 5

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