SSC JE 9 Oct 2023 PAPER I Electrical Part 7
SSC JE 9 Oct 2023 PAPER I Electrical Part 7
Q.52 Which of the following statements is true about selection of the size of units in electrical energy generation?
1. The size should be selected such that the unit operates close to the load curve of the station.
2. The size of units must match both the maximum demand curve and the load curve.
3. The size should be selected independent of both the maximum demand curve and the load curve.
4. The size must be selected such that the unit operates close to the maximum demand curve of the station.
Correct Option: 1
Q.53 A permanent magnetic material has _________ retentivity.
1. constant
2. zero
3. high
4. low
Correct Option: 3
SSC JE 9 Oct 2023 PAPER I Electrical Part 7
Q.54 Which of the following is a ferromagnetic material?
1. Nickel
2. Gold
3. Water
4. Oxygen
Correct Option: 1
Q.55 The horizontal amplifier should be designed for ____________.
1. high frequency signals with a fast rise time
2. high amplitude signals with a fast rise time
3. low amplitude signals with a fast rise time
4. high amplitude signals with a slow rise time
Correct Option: 4
Q.56 Which of the following statements is/are correct regarding black liquor?A) It retains more than 50% of the biomass energy of wood.B) It is a non-toxic substance produced when wood is burned into paper.C) Tall oil is an important by-product separated from black liquor by skimming.
1. A and B
2. A and C
3. B and C
4. Only C
Correct Option: 2
SSC JE 9 Oct 2023 PAPER I Electrical Part 7
Q.57 What is the use of encoder in the DC servomotor?
1. Determines the rotational speed of the motor
2. Determines the magnetic field strength inside the motor
3. Determines the input voltage of the motor
4. Determines the temperature of the windings of the motor
Correct Option: 1
Q.58 A coal-fired thermal power plant generates 750 MW of electricity with a thermal efficiency of 30%. The coal has a heating value of 30,000 kJ/kg. Find the mass flow rate of the coal required to generate the required electricity.
1. 0.833 kg/s
2. 0.0833 kg/s
3. 8.33 kg/s
4. 83.33 kg/s
Correct Option: 4
SSC JE 9 Oct 2023 PAPER I Electrical Part 7
Q.59 Which of the following is NOT a type of tender, depending on the type of contract?
1. Percentage rate tender
2. Item rate tender
3. Selected tender
4. Lum-sum tender
Correct Option: 3
Q.60 Choose the most efficient generator for wind power generation.
1. Induction generators
2. Permanent magnet synchronous generator
3. Doubly-fed induction generator
4. Squirrel cage induction generators
Correct Option: 3
SSC JE 9 Oct 2023 PAPER I Electrical Part 7
Q.64 Which of the following is true regarding reciprocity theorem?
1. The sum of response and the excitation remains the same.
2. The ratio of the response to the excitation remains the same.
3. The difference between response and excitation remains the same.
4. The product of response and excitation remains the same.
Correct Option: 2
SSC JE 9 Oct 2023 PAPER I Electrical Part 7
Q.65 Which of the following lighting calculation methods is handy and quick?
1. Point by point method
2. Lumen method
3. Flux method
4. Watts per square metre method
Correct Option: 4
Q.67 For an ideal short transmission line with zero voltage regulation, if receiving end voltage is 150 kV, then the sending end voltage will be:
1. 200 kV
2. 150 kV
3. 300 kV
4. 125 kV
Correct Option: 2
SSC JE 9 Oct 2023 PAPER I Electrical Part 7
Q.69 Identify the correct voltage range of medium transmission line.
1. >20 kV < 100 kV
2. >100 kV < 200 KV
3. >1 kV < 5 kV
4. >5 kV < 10 kV
Correct Option: 1
SSC JE 9 Oct 2023 PAPER I Electrical Part 7
Q.70 In a capacitor-start capacitor-run induction motor, under standstill condition forward and backward voltages are ________.
1. unequal in magnitude
2. infinite
3. zero
4. equal in magnitude
Correct Option: 4
Q.71 An LC circuit with inductance L = 2H and capacitance C = 8 μF is connected to an AC source. Find the value of the power factor of combination.
1. 0
2. 2
3. 10
4. 8
Correct Option: 1
Q.72 What is the function of the phosphor-coated screen in a CRT?
1. It is the part that emits light
2. It is the part that regulates the intensity of the electron beam
3. It is the part that generates a beam of electrons
4. It is the part that moves the direction of the electron beam
Correct Option: 1
SSC JE 9 Oct 2023 PAPER I Electrical Part 7
Q.73 During working of a permanent magnet synchronous motor, __________________.
1. stator and rotor both produce rotating magnetic field
2. stator and rotor both produce constant magnetic field
3. rotor produces rotating magnetic field and stator produces constant magnetic field
4. rotor produces constant magnetic field and stator produces rotating magnetic field
Correct Option: 4
Q.74 Three-point lighting is usually employed in film lighting schemes. Which of the following does NOT form a part of the scheme?
1. Key lighting
2. Fill lighting
3. Bounce lighting
4. Back lighting
Correct Option: 3
SSC JE 9 Oct 2023 PAPER I Electrical Part 7
Q.75 A balanced star connected load of 4 + j3 Ω per phase connected to a 3-phase, 230 V (phase value) supply. Find the value of active power.
1. 15.34 kW
2. 22.45 kW
3. 19.13 kW
4. 25.4 kW
Correct Option: 4
SSC JE 9 Oct 2023 PAPER I Electrical Part 7
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