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1st August 2014, 01:41 PM
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| Re: Core companies in Tamil Nadu
As you want to get the list of some of the best core companies in Tamil Nadu so here it is for you: NTPC NHPC NALCO Mahindra & Mahindra BHEL. BEL SAIL GAIL Hindustan Motors Ltd Hyundai Motors India Ltd Mahindra & Mahindra Royal Enfield Ltd Jindal Steel Steel Authority of India Limited(SAIL) Geometrics Indian Oil Corporation Addison & Co Ltd Ashok Leyland Ltd, Ennore Axles India Ltd TATA Motors Sundaram-Clayton Ltd Tractor and Farm Equipment (TAFE) Bharat Dynamics Limited Bharat Heavy Plates and Vessels(BHPV) VEDANTA.Addison & Co Ltd Ashok Leyland Ltd, Ennore Tube Investments of India Ltd FIAT Bharat Electronics Ltd.(BEL) BPCL Hindustan Petroleum Corporation of India Flakt (India) Ltd Ford India Ltd Integral Coach Factory, Perambur Oil and Natural Gas Corporation(ONGC) Steel Authority of India Limited(SAIL) Axles India Ltd Chennai Petroleum Corp Ltd Ennore Foundries Ltd Esab India Ltd Heavy Vehicles Factory, Avadi Hindustan Motors Ltd Hyundai Motors India Ltd Nokia India Ltd Royal Enfield Ltd Saint-Gobain Glass India Ltd Samsung India Electronics Tractor and Farm Equipment (TAFE) Tube Investments of India Ltd Westas Wind Technology India Pvt Ltd. Here for your reference I am giving you the last year papers of SAIL Management Trainee: 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, a < 90°, source of e.m.f. in load b) Half-controlled bridge, a > 90°, source of e.m.f. in load c) Full-controlled bridge, a > 90°, source of e.m.f. in load d) Full-controlled bridge, a < 90°, source of e.m.f. in load Ans: Full-controlled bridge, a > 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) SCRd) 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 winding8. 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 improvedc) 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: Both15. 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 bussc) 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-Shuntb) 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 above25.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 Ans: 26. V=100Sin (1000t+46 deg), I=2Sin (1000t+80 deg) what are the elements in the circuit a) R=30 ohm, L=30 mH b) R=30 ohm, C=33.3 micro farads c) R=40 ohm, L=30 mH d) R=40 ohm, L=33.3 micro farads Ans: R=40 ohm, L=33.3 micro farads 27. L=10 mH, I=100Sin50t 0 a) b) c) d) Ans: 28. In dielectric measurement, the dielectric loss is proportional to a) F b) Vc) I d) Vsqr Ans: Vsqr 29. G(s) = (1-s)/s(s+2) then closed loop transfer function is a) Unstable b) Stable c) Marginally stable d) All Ans: Stable 30. G(s) = (1+0.5s)/(1+s) find which type of net work it is a) Lead net work b) Lag net work c) Lag - Lead net work d) Lead - Lag net work Ans: Lag net work |