RRB JE electrical practice paper | RRB JE Electrical

Ques.71. Pressure errors can be measured by

1. Synchro unit
2. Potentiometer
3. Thermocouple
4. Combination of differential bellow strain gauge

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Ques.72. Drag cup motor is design to provide

1. High intertia
2. High starting torque
3. Low intertia
4. Low starting torque

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Ques.73. Power electronics essentially delas with control of A.C Power at

1. Frequency above 2 kHz
2. Frequencies above 1000 kHz
3. Frequencies less than 10 Hz
4. 50 Hz frequencies

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Ques.74. When the emitter terminal of UJT is ON the resistance between the emitter terminal and the lower base terminal

1. Remains the same
2. Decreased
3. Increased
4. None of these

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Ques.75. When the emitter terminal of UJT is OPEN the resistance between the emitter terminal and the lower base terminal

1. High
2. Low
3. Extreme Low
4. None of these

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Ques.76. A diode rectifier with a C filter will have average output voltage ___________ than that obtained by rectifier without the C filter

1. Lower
2. Higher
3. Same as
4. None of these

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Ques.77. The power demand can be estimated approximately by

1. Load survey method
2. Mathematical method
3. Statistical method
4. Economic Method

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Ques.78. A liquid crystal display requires for

1. An AC drive
2. A DC drive
3. Both AC and DC drive
4. None of these

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Ques.79. The resistance of potential transformer winding is minimized by using

1. Thick conductors and small length of turns
2. Thin conductors and small length of turns
3. Thin conductors and large length of turns
4. Thick conductors and length of turns

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Ques.80. LISN a device used to measured  conducted emissions LISN stands

1. Line integrated stablization network
2. Line impedance stablization network
3. Line integrated stored network
4. Laser integrated stablization network

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