#1
31st July 2014, 01:18 PM
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Railway Recruitment Board last year question papers of Jr. Electrical Engineering
Will you please share with me the Railway Recruitment Board last year question papers of Jr. Electrical Engineering?
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#2
1st August 2014, 09:31 AM
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Re: Railway Recruitment Board last year question papers of Jr. Electrical Engineering
As you want to get the details of Railway Recruitment Board last year question papers of Jr. Electrical Engineering so here it is for you: 1. A resistance of 10 ohm is connected across a supply of 200V. If resistance R is now connected in parallel with a 10 ohm resistance, the current drawn from the supply gets doubled. The value of unknown resistance R is (a) 5 ohm (b) 20 ohm (c) 10 ohm (d) 15 ohm Ans : c 2. Kirchhoff’s first law is also called as (a) voltage law (b) Current law (c) Mesh Current law (d) All the above Ans : b 3. Find the total resistance when four 3 Ohm resistance are connected in series (a) 3 ohm (b) 12 ohm (c) 14 ohm (d) 8 ohm Ans : b 4. The practical unit of power is (a) Joule (b) Ampere (c) Watt (d) Weber Ans : c 5. Form factor of a sine wave is (a) 1.414 (b) 1 (c) 0 (d) 1.11 Ans : d 6. The unit of resistance is (a) Mho (b) ohm-m (c) Ohms (d) Amps Ans :c 7. Unit of impedance is (a) Ampere (b) Volt (c) Ohm (d) mho Ans : c 8. The close path of the flux around any current carrying circuit is referred as Circuit. (a) Magnetic (b) Electric (c) Electromagnetic (d) None of these Ans : a 9. The current flowing in an electrical circuit is due to the existence of (a) mmf (b) emf (c) Resistance (d) Reluctance Ans : b 10. The magnetic flux flow through a magnetic circuit is due to (a) mmf (b) emf (c) Resistance (d) Reluctance Ans : a 11. The on-line UPS is also called as a. Stand-by UPS b. Line Interactive UPS c. Off line UPS d. Current line UPS Ans. b 12. ________ is used to convert alternating current to direct current. a. Transformer b. Diode c. Resistor d. Transistor Ans. b 13. The supply voltage varies sinusoid ally and has a frequency __________ Hz. a. 60 b. 50 c. 20 d. 10 Ans. b 14. Expression for magneto-motive force is (a) N/I (b) 1/NI (c) I/N (d) IN Ans : d 15. Unit of mmf is (a) Ampere /Volt (b) Ampere- turns (c) Volt (d) Volt/Ampere Ans : b 16. Magnetic field strength is equal to (a) mmf. L (b) L/ mmf (c) mmf/ L (d) 1/mmf.L Ans : c 17. Peak inverse voltage of bridge rectifier is as that of centre-tap circuit. a. Same b. Twice c. Half d. Four times Ans. c 18. Peak Resistance of the diode is increased when a. Forward biased b. Reverse biased c. Both forward and reverse biased d. Either a or b Ans. b 19. The number of lines of force passing through the secondary coil S when unit current changes in the primary coil P are called (a) Self inductance (b) Mutual inductance (c) Self induction (d) Mutual induction Ans : c 20. Unit of flux (a) Amp- turns (b) Weber (c) Volts (d) Amps Ans : b |
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