Interested to Buy Any Domain ? << Click Here >> for more details...
No load test of induction motor is carried out to compute= A stator resistance B rotor resistance C magnetizing reactance D rotor reactance
1 5210Short circuit test of induction motor is carried out to compute= A stator resistance B rotor resistance C magnetizing reactance D stator reactance
2 6408Auto transformer starter gives the same effect as star/delta strater if its turn ratio = A 0.5 B 0.67 C o.66 D 0.577
1 3815Rotor resistance starter is used to obtain= A increased starting torque B decrease starting current C decrease starting loss D increase efficiency
1 2770Plugging is a phenomenon to= A braking the motor B to accelerate the motor C to run IM as generator D to start the motor
3094During regenerative breaking= A rotating magnetic field is reversed B slip is positive C torque is positive D slip is negative
2130In which of the following case, the rotating magnetic field is reversed? A regenerative breaking B plugging C dynamic breaking D forward motoring
197029 Which of the following breaking method save energy? A regenerative breaking B plugging C dynamic breaking D none of above
1 3849Electromagnetic torque developed by the motor is compared to shaft torque. A less B same C depends on motor design D more
3 6321Electromagnetic torque developed by the motor is compared to shaft torque. A less B same C depends on motor design D more
2034An 8 pole, 50 Hz, 3-phase IM is loaded to a poing where pull out torque will occur. The rotor resistance per phase is 0.3 ohm and motor stalls at 650 rpm. The rotor reactance at stand still is A 2 ohm B 1.25 ohm C 3.15 ohm D 2.25 ohm
2283An 8 pole, 50 Hz, 3-phase IM is loaded to a poing where pull out torque will occur. The rotor resistance per phase is 0.3 ohm and motor stalls at 650 rpm. The slip when motor stalls is A 1 B 0 C 13.33% D 10.33%
1931An 8 pole, 50 Hz, 3-phase IM is loaded to a poing where pull out torque will occur. The rotor resistance per phase is 0.3 ohm and motor stalls at 650 rpm. The rotor frequency at maximum torque point is A 3.33% B 4.44% C 5.55% D 6.66%
1 3795In an ideal transformer no load primary current I0 A lags behind V1 by 90 degree B is in the phase with V1 C leads V1 by 90 degree D lags V1 by 45 degree
1 5338Post New Electrical Engineering Questions
plese send me the oces/dgfs sylabus and previous year question pattern of electrical engg.?
what type of earthing do for dry fissure rock?
what is the advantage of connecting capacitors in delta than in star?
What are the advantages of using distance protection schemes as opposed to normal overcurrent/ earth fault protection on high voltage feeders.
how to calculte capacitor range for single phase induction motors??pls tel
why occ characteristics of generator is also called as magnatization characteristics ?
how single phase preventer works ?
What is different between resistance grounding system and resistance earthing system?
generally in LT and MV motors we are using 3.5Coresx16,25,35,50 etc cable for supply.although motors is earthed at two point and having all protection.then why we are using that 1/2 core for earthing the motors.while in HT cable we are using only 3core cable for motor supply.generally lt and mv motors are delta connected and ht motors having star connection.whethere it is having any relation with winding connection( star or delta).all motors i am talking about are dol only.can anybody solve my confusion.thanks...
What is the efficiency during maximum power transfer?
Why in 6 KV XLPE cable termination kit used and why not in 380 V xlpe cable same is not used
i want to model paper for section engg.
what is the principle of operation of tungstun bulb ??
Is it possible to measure correct value of earth resistance & cable insulation ristance with out disconncting earth lead & both sides of cable ends? If not, any other method to measure ER & CIR with out disconneting from the system.
How to calculate the External Resistance required for 60HP slipring motor in case no any data of the Motor is available???
