L&T(ECC)  Placement Paper   Whole Testpaper   puducherry-26 Jul 2007

#### L&T(ECC)  Placement Paper   Whole Testpaper   puducherry-26 Jul 2007

• Posted by  FreshersWorld
7 Jan, 2012

Hai, I am Praveen Kumar, from pondicherry engg college, Puducherry,

On 26-07-07 , L&T(ECC) came to our college for campus recruiting, besides our college

Annamalai university students were also participated in recruitment,

I am doing M.Tech (electrical), for one hour they conducted test for 60 marks,

30 one mark,15 two marks, no negative marks.

The test was completely based on respective   subjects only; they are allowing mechanical, civil, environmental engg students along electrical.

The subjects they covered are power systems, power electronics, electrical machines,

Electrical measurements, simple logical circuits,

I remembered only few questions

• Convert 26 into binary form
• In which gate o/p is 1 when all i/p are 1
• What is the 2?s complement of  -17
• What is  moving coil ammeter reading, if supply is (10+15 sin 314 wt),
• If voltmeter reads 100V,if we want to measure 150 what we have to do
• Y-delta starter is used for
•  In a balanced Y connection if VAN=400at 60,what is VBN
•  for unity  TMS 10 sec, what about 0.5 TMS
• 400V,15 kW,4%slip,50 Hz,  4 pole what is the torque,
•  what r the factors influencing  change in torque &speed
• buccholtz relay is used for
• lightening arrester is used for
• what is the power dissipated in i=10+5 sin 314wt for 2ohm resistor
• what should be the impedance value for 3-4j,for max power transfer
• if current required for triggering thyristor at -30 degrees(temp) is 80 mA, what is the current required at 60 degrees.
• Question regarding  thevenins resistance
• Question regarding periodic Fourier series
• Question regarding reactive power compensation
• Question regarding positive sequence currents
• 400v,50ohm resistor , inductive reactance 100ohm , circuit to be resonance ,find the voltage across capacitor
• what is the ideal power loss for 1.1mH & 11.86 nF, length is negligible
• voltage
• sync motor is used for
• regarding p.u. values
• regarding voltage bus parameters
• charging of capacitor
• reactive power compensation
• Y-bus, Z-bus 2 x 2 matrix
•   Poles location
• I controller is used for

Finally the paper is simple, prepare some basics. ALL THE BEST.