SSC JE 11 Oct 2023 PAPER I Electrical Part 8
SSC JE 11 Oct 2023 PAPER I Electrical Part 8
Q.76 Which of the following lamps is used for the determination of polarity of DC mains?
1. Neon discharge lamp
2. Mercury vapour lamp
3. Carbon arc lamp
4. Sodium vapour lamp
Correct Option: 1
Q.77 Which of the following statements is/are true regarding all day efficiency of a transformer?(i) All day efficiency is also called as commercial efficiency.(ii) All day efficiency primarily depends on the duration of load and amount of load.(iii) All day efficiency is achieved when the iron losses are less.
1. Only (ii) is true
2. Only (i) is true
3. Both (ii) and (iii) are true
4. Both (i) and (iii) are true
Correct Option: 3
SSC JE 11 Oct 2023 PAPER I Electrical Part 8
Q.79 Which of the following is the application of soft magnetic materials?
1. Permanent magnets
2. Speakers
3. Electromagnets
4. Microphones
Correct Option: 3
SSC JE 11 Oct 2023 PAPER I Electrical Part 8
Q.80 Power factor of an IM is low at ________.
1. half load
2. no load
3. quarter load
4. full load
Correct Option: 2
Q.81 What is the purpose of laminating the core of a transformer?
1. To increase the eddy current loss
2. To induce eddy current loss
3. To make the core heavier
4. To minimise the eddy current loss
Correct Option: 4
Q.82 Which of the following motors DO/DOES NOT use three-point starters?
1. DC shunt motor
2. Both DC shunt and compound motors
3. DC series motor
4. DC compound motor
Correct Option: 3
SSC JE 11 Oct 2023 PAPER I Electrical Part 8
Q.83 Select the INCORRECT statement(s) regarding squirrel-cage induction generators used in wind power plants.A) They can be used in both constant-speed and variable-speed applications.B) They work within a narrow speed range, which is slightly above the synchronous speed.C) Squirrel-cage induction generators are more expensive than wound-rotor induction generators.
1. Only A
2. Only B
3. Only C
4. A and B
Correct Option: 3
Q.84 When two or more sinusoidal waves are precisely in step with one another, they are said to be:
1. out of phase
2. in phase
3. 60 degrees lagging
4. 60 degrees leading
Correct Option: 2
SSC JE 11 Oct 2023 PAPER I Electrical Part 8
Q.86 Which of the following is NOT the requirement of a DC servomotor?
1. Better precision
2. Linear torque-speed characteristics
3. High accuracy
4. Less torque to weight ratio
Correct Option: 4
SSC JE 11 Oct 2023 PAPER I Electrical Part 8
Q.87 As the leading power factor of the load of an alternator decreases, the magnitude of generated voltage required to give rated terminal voltage ______________.
1. decreases
2. increases
3. first increases and then decreases
4. remains unchanged
Correct Option: 2
Q.88 What kind of metal does continuous bus bar wire typically consist of?
1. Iron
2. Copper or aluminium
3. Plastic
4. Neither copper nor aluminium
Correct Option: 2
Q.89 In the application of electrical circuits, the nichrome that is used to make the heating element in an electric cooker has ________.
1. 20% nickel and 80% chromium
2. 80% nickel and 20% chromium
3. 40% nickel and 60% chromium
4. 50% nickel and 50% chromium
Correct Option: 2
SSC JE 11 Oct 2023 PAPER I Electrical Part 8
Q.92 Which of the following options shows the correct proportion of helium and neon gases in the mixture for helium neon laser?
1. 80% of helium and 20% of neon
2. 90% of helium and 10% of neon
3. 10% of helium and 90% of neon
4. 20% of helium and 20% of neon
Correct Option: 2
SSC JE 11 Oct 2023 PAPER I Electrical Part 8
Q.93 What will be the direction of deflecting torque in a moving iron instrument if the direction of current in the coil is reversed at the same magnitude?
1. Reduced to zero
2. Same direction
3. Reduced by half
4. Reverse direction
Correct Option: 2
Q.94 A non-inductive resistor of 50 Ω is connected in series with a coil of inductance 0.25 Henry and of negligible resistance across a 250 V, 50 Hz supply. The net impedance of the circuit is given by 93.07 Ω. Find the value of reactive power.
1. 1091.25 VAR
2. 1022.14 VAR
3. 567.59 VAR
4. 727.5 VAR
Correct Option: 3
Q.95 If 15A current is flowing through a solenoid of inductance 4H, find the magnetic energy stored in the solenoid.
1. 540 J
2. 100 J
3. 450 J
4. 1000 J
Correct Option: 3
SSC JE 11 Oct 2023 PAPER I Electrical Part 8
Q.96 The standard voltage between any two phases in three-phase four-wire secondary distribution system have ______.
1. 400 V
2. 33 kV
3. 11 kV
4. 230 V
Correct Option: 1
Q.97 An electrodynamometer is widely used as a ________.
1. calibration instrument and transfer instrument
2. low impedance circuit
3. transfer instrument
4. calibration instrument
Correct Option: 3
SSC JE 11 Oct 2023 PAPER I Electrical Part 8
Q.98 A constant voltage source is applied between the two ends of a wire. If the length of the wire is doubled and the radius remains the same, then the rate of heat developed in the wire ________.
1. will remain the same
2. will be zero
3. will be 4 times
4. will be halved
Correct Option: 4
Q.100 What is core-stepping in core-type transformers?
1. A method to increase the R loss
2. A method to increase the length of the mean turn
3. A method to reduce the space factor
4. A method to reduce the length of the mean turn
Correct Option: 4
SSC JE 11 Oct 2023 PAPER I Electrical Part 8
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