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  #2  
5th August 2014, 11:02 AM
Super Moderator
 
Join Date: Apr 2013
Re: RRB Junior Engineer Exam Electrical Question Paper

Here I am providing the list of few questions of RRB Junior Engineer Exam Electrical Question Paper for your idea.


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
  #3  
21st March 2015, 04:02 PM
Unregistered
Guest
 
Re: RRB Junior Engineer Exam Electrical Question Paper

Here I am looking for the RRB Junior Engineer Exam Electrical Question Paper so can any body please provide me the same?
  #4  
21st March 2015, 04:05 PM
Super Moderator
 
Join Date: Apr 2013
Re: RRB Junior Engineer Exam Electrical Question Paper

As per your request here I am sharing the RRB Junior Engineer Exam Electrical Question Paper which you are looking for

Power factor of a linear circuit is defined as the:
a. Ratio of real power to reactive power
b. Ratio of real power to apparent power
c. Ratio of reactive power to apparent power
d. Ratio of resistance to inductance

In the circuit given below, vs = 18sin ωt, R1 = 1 Ω and RL = 4 Ω. The value of n for which
the source delivers maximum power to load RL is:
a. 1
b. 2
c. 3
d. 4

Schokley diode is a:
a. Two-layer pn junction device.
b. Three-layer pin junction device.
c. Four-layer pnpn junction device.
d. None of the above.

Consider Insulated Gate Bipolar Transistor (IGBT) and Bipolar Junction Transistor (BJT). Which of
the following statement is correct:
a. Both IGBT and BJT are current-controlled devices
b. Both IGBT and BJT are voltage-controlled devices
c. IGBT is a current-controlled device and BJT is a voltage-controlled device
d. IGBT is a voltage-controlled device and BJT is a current-controlled device

RRB Junior Engineer Exam Electrical Question Paper







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