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Electromagnetic torque developed by the motor is compared to shaft torque. A less B same C depends on motor design D more
2042An 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
2288An 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%
1940An 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 3800In 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 5352Transformer cores are laminated in order to A simplify its construction B minimize eddy current loss C reduce cost D reduce hysterisis loss
3284A transformer has negative voltage regulation when its load PF is A zero B unity C lagging D leading
1 8180Essential condition for parallel operation of two single phase transformer is that they should have same A polarity B kVA rating C voltage ratio D % impedance
1 11371Saving in copper achieved by converting a 2 winding transformer in to an auto transformer is determined by A voltage transformation ratio B load on secondary C quality of core material D size of transformer core
3157kVA rating of ordinary transformer is increased when connected as an auto transformer because A transformation ratio increased B secondary voltage increased C energy is transferred both inductively and conductively D secondary current increased
2668At light load transformer efficiency is less because A secondary output is low B transformer losses are high C fixed loss is high compared to output D copper loss is small
1 5820Which of the following connection is best suited for 3-ph, 4 wire system A delta-delta B star-star C delta-star D star-delta
2 9989A T-T transformer can not be parallel with transformer A V-V B star-delta C star-star D delta-delta
1 6519Following test should be conducted to find out relative polarity of transformenr terminals A no load test B back to back test C phasing out test D none of above
2227In power transformer tappings are provided on A high voltage side B low voltage side C In middle of both the windings D both high and low voltage side
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2 5389
can u briefly explain aboutan aryton shunt multirange DC ammeter?
Can i know what will be the cut off criteria for go to final isro interview??
What is the significance of the bandwidth of an amplifier?
Why would you use hydraulics rather than pneumatics?
what is residuel magnetism. and how order lead acid batteries for 24 volt. emergency lighting system.
Define ease?
hey, i am confused with ece n cse..both attract me the same..just that wich one has higher placements n pay pakages n which one has higher scope after doing mba??..reply urgently..
Is there any way to slow coke formation in ethylene furnaces?
What is first echo & echo window in radar type level transmitter?
will there be any problem by recovering slip from single phase induction motors?
3- What is the target from Zero Impedance, Single Phase Imp., S/C Imp. and magnetic balance tests?
There is any especial requirement for motor to drive through with VFD?
what is firing angle of phase controlled rectifier?
hi i m Divyen . i have completed 10+3 in diploma in mechanical Engineering. so can i apply for student visa for canada?
Identification of ss fittings, pilot valves, relief valve.
