SSC JE Electrical Previous Year Questions Quiz

1. For an ABCD parameter of a transmission line, which of the following is correct?

1. AB – CD = 1
2. BD – AC = 1
3. AD – BC = 1
4. AD – BC = 0

2. Synchronous impedance method of finding voltage regulation of a synchronous motor is also known as:

1.  the zero power factor method
2. the EMF method
3. the MMF method
4. the saturated synchronous reactance method

3. Starting current of a straight type repulsion motor is about ________ its full load value.

1. 3 to 4 times
2. half
3. the same as
4. 7 to 10 times

4. Which of the following motors is operated either on direct or single-phase AC supply and produces approximately the same speed and output?

1. Universal motor
2. Capacitor start and capacitor run induction motor
3. Capacitor start induction run motor
4. 1-phase series motor

5. The accuracy of D’ Arsonval movements used in common laboratory meters is about ________ of the full-scale reading.

1. 10 %
2. 0.1 %
3. 5 %
4. 1 %

6. The expected voltage value across an element is 50 V. However, a voltmeter reads it as 48 V. Calculate the percentage error in the measurement.

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

7. The unit of magnetic field intensity is:

1. H/m
2. AT/m
3. Wb / m²
4.  A / Wb

8. The highest rating of Triple pole with Neutral (TPN) MCB main switches available in the local market is _______.

1. 126 A
2. 189 A
3. 289 A
4. 63 A

9. Which of the following is NOT desirable property of a good heating element?

1.  High specific resistance
2. High ductility
3. High temperature coefficient of resistance
4. High melting temperature

10. In the Kando system of electrical traction, a ________ supply from the sub-station is picked up by the locomotive through the single overhead contact wire.

1. 3.3-kV, 25-Hz
2. 16-kV, 50-Hz
3. 25-kV, 25-Hz
4. 15-kV, 16(2/3)−Hz

11. CRO (Cathod Ray Oscilloscope) CANNOT be used to measure _______.

1. Frequency
2. Phase
3. Power
4. Voltage

12. Which of the following connections in a three-phase transformer is called open-delta connection?

1. V-V
2. Δ-Δ
3. Δ-Y
4. Y-Y

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What is Measurement? & Classification of Electrical instrument	Introduction
	Absolute Instrument
	Types of absolute instrument with uses
	Secondary instrument
	Uses of secondary instrument

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