#1
8th December 2014, 08:38 AM
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GSECL Vidyut Sahayak Exam Question Paper
Will you please provide the question paper of GSECL Vidyut Sahayak Entrance Exam ?
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#2
8th December 2014, 12:04 PM
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Re: GSECL Vidyut Sahayak Exam Question Paper
Here is the list of few questions of GSECL Vidyut Sahayak Exam Sample Question Paper which you are looking for . A three-phase, salient pole synchronous motor is connected to an infinite bus. Ig is operated at no load a normal excitation. The field excitation of the motor is first reduced to zero and then increased in reverse direction gradually. Then the armature current (A) Increases continuously (B) First increases and then decreases steeply (C) First decreases and then increases steeply (D) Remains constant A 4 – point starter is used to start and control the speed of a (A) dc shunt motor with armature resistance control (B) dc shunt motor with field weakening control (C) dc series motor (D) dc compound motor A low – pass filter with a cut-off frequency of 30Hz is cascaded with a high-pass filter with a cut-off frequency of 20Hz. The resultant system of filters will function as (A) an all-pass filter (B) an all-stop filter (c) an band stop (band-reject) filter (D) a band – pass filter A negative sequence relay is commonly used to protect (A) an alternator (B) an transformer (C) a transmission line (D) a bus bar For enhancing the power transmission in along EHV transmission line, the most preferred method is to connect a (A) Series inductive compensator in the line (B) Shunt inductive compensator at the receiving end (C) Series capacitive compensator in the line (D) Shunt capacitive compensator at the sending end A 4 – point starter is used to start and control the speed of a (A) dc shunt motor with armature resistance control (B) dc shunt motor with field weakening control (C) dc series motor (D) dc compound motor Answer: - (A) A three-phase, salient pole synchronous motor is connected to an infinite bus. Ig is operated at no load a normal excitation. The field excitation of the motor is first reduced to zero and then increased in reverse direction gradually. Then the armature current (A) Increases continuously (B) First increases and then decreases steeply (C) First decreases and then increases steeply (D) Remains constant A negative sequence relay is commonly used to protect (A) an alternator (B) an transformer (C) a transmission line (D) a bus bar Answer: - (A) For enhancing the power transmission in along EHV transmission line, the most preferred method is to connect a (A) Series inductive compensator in the line (B) Shunt inductive compensator at the receiving end (C) Series capacitive compensator in the line (D) Shunt capacitive compensator at the sending end Answer: - (C) |
#3
17th May 2015, 12:01 PM
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Re: GSECL Vidyut Sahayak Exam Question Paper
I am appearing in Vidyut Sahayak Exam conducted by GSECL. So I am looking for question papers. So can some one provide question papers of Vidyut Sahayak Exam?
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#4
17th May 2015, 12:02 PM
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Re: GSECL Vidyut Sahayak Exam Question Paper
Here you are looking for question papers of Vidyut Sahayak Exam conducted by GSECL, so I am giving following question papers: GSECL Vidyut Sahayak Exam Question Paper 1. Mho relay is usually employed for the protection of a) Short lines only b) Medium lines only c) Long lines only d) Any line Ans: Long lines only 2. A modern power semiconductor device IGBT is combines the characteristics of a) BJT and MOSFET b) FCT and GTO c) SCR and MOSFET d) SCR and BJT Ans: BJT and MOSFET 3. For a single-phase a.c. to d.c. controlled rectifier to operate in regenerative mode, which of the following conditions should be satisfied? a) Half –controlled bridge, α 90°, source of e.m.f. in load c) Full-controlled bridge, α > 90°, source of e.m.f. in load d) Full-controlled bridge, α 90°, source of e.m.f. in load 4. Which is the most suitable power device for high frequency ( more 100 kHz) switching application? a) Power MOSFET b) BJT c) SCR d) UJT Ans: Power MOSFET 5. In a thyristor Latching current is ________ than Holding current a) Equal b) Less c) Greater d) None Ans: Greater 6. The transfer function of a system is 10/(1+s) when operating as a unity feedback system, the steady state error to a step input will be a) 0 b) 1/11 c) 10 d) Infinity Ans: 1/11 7. Which one of the following statements for a dc machine which is provided with inter pole winding (IW) as well as compensating winding (CW) is correct a) Both IW and CW are connected in series with Armature winding b) Both IW and CW are connected in parallel with Armature winding c) IW connected in series but CW is connected in parallel with Armature winding d) CW connected in series but IW is connected in parallel with Armature winding Ans: Both IW and CW are connected in series with Armature winding 8. A 0-10 mA PMMC ammeter reads 5mA in a circuit; its bottom control spring snaps out suddenly the meter will now read. a) 5mA b) 10mA c) 2.5mA d) 0 Ans: 0 9. A dc cumulatively compounded motor delivers rated load torque at rated speed. If series field is short circuited, then the armature current and speed will a) Both increases b) Both decreases c) Increases and decreases d) Decreases and increases Ans: Both increases 10. Moving coil in dynamometer wattmeter connected a) In series with fixed coil b) Across supply c) In series with load d) Across load Ans: Across supply 11. In an induction machine, if the air gap increased a) Speed will be reduced b) Efficiency will be improved c) Power factor will be lowered d) Breakdown torque will be reduced Ans: Power factor will be lowered 12. A CRO screen has ten divisions on the horizontal scale. If a voltage signal 5 sin 314t+45 deg)is examined with a line base settings of 5 msec/div, the number of cycles of signal displayed on the screen will be a) 0.5 cycles b) 2.5 cycles c) 5 cycles d) 10 cycles Ans: 2.5 cycles 13. A 3-phase 50HZ SCIM takes a power input of 30 KW at its full load speed of 1440 rpm. Total stator losses are 1 KW. The slip and rotor ohmic losses at full load are a) 0.02, 600 W b) 0.04, 580 W c) 0.04, 1160 W d) 0.04, 1200 W Ans: 0.04, 1160 W 14. Thermocouple is used to measure a) AC b) DC c) Both d) None Ans: Both 15. The two watt meters measurement the ratio of two meter readings is –(1-sqrt3) 1+sqrt3) then the power factor is a) 1 b) 0.866 c) 0.707 d) 0 Ans: 0.707 16. Hays bridge is used to measure___________ and Schering bridge is used to measure____________ a) Inductance, Inductance b) Inductance, Capacitance c) Capacitance, Inductance d) Resistance, Capacitance Ans: Inductance, Capacitance 17. When sine wave is given as input to Schmitt trigger then its generates a) Sine wave b) Saw tooth wave c) Triangle wave d) Square wave Ans: Square wave 18. In Gauss Seidel method the following factors are influenced for operation a) Acceleration factor b) Selection of slack buss c) Both d) None Ans: Selection of slack buss* 19. i. (X’+Y’) A. Low-pass filter function ii. (X’Y’) B. Sum iii. (XY) C. NAND D. Carry E.NOR a) i-C, ii-E, iii-D b) i-C, ii-E, iii-B c) i-C, ii-B, iii-D d) i-C, ii-E, iii-A Ans: i-C, ii-E, iii-D 20. The phase lead compensation is used to a) Increase rise time and decrease overshoot b) Decrease both rise time and overshoot c) Increase both rise time and overshoot d) Decrease rise time and increase overshoot Ans: Decrease rise time and increase overshoot 21. Voltage feed back amplifier is a a) Shunt-Shunt b) Shunt-Series c) Series-Shunt d) Series- Series Ans: Shunt-Shunt 22. In microprocessor the next instruction to be executed is stored in a) Program Counter b) Stack Pointer c) Memory Pointer d) Accumulator Ans: Program Counter 23. The following element retains it energy after source is disconnected a) Resister b) Inductor c) Capacitor d) Thermistor Ans: 24. In series RLC circuit at resonant a) Voltage is in phase with current b) Current is maximum c) Inductive reactance = Capacitive reactance d) All of the above Ans: All of the above 25.For RC low pass filter R=100 K ohms, C= 5 micro farads then lower cutt of frequency is a) 1 K HZ b) 0 HZ c) 381.3 HZ d) Infinity |
#5
21st November 2017, 11:49 AM
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Re: GSECL Vidyut Sahayak Exam Question Paper
plase gsecl electrical exam paper send me
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