Q1:- A passive n/w has
Q2:- The lekage reactance of 3-phase alternator determined by performing
Q3:- The use of the higher flux density in the t/f design
- no current source
- no emf source
- only emf source
- neither current sources nor emf source
Q2:- The lekage reactance of 3-phase alternator determined by performing
- open ckt and zero power factor tests
- zero power factor and sip tests
- open ckt and short ckt tests
- short ckt and slip test
Q3:- The use of the higher flux density in the t/f design
- reduces the weight per KVA
- increase the weight per KVA
- has no relation with weight of t/f
- increase the weight per KW
Q4;- Two transformer operating in parallel wi shae the laod depending upon their
- rating
- lekage reactance
- efficiency
- per unit impedance
Q5:-The speed of dc motor can be controlled by the the variation of
a. armature voltage
b.field current
c.armature ckt resistance
d.angle of brush shift
- a,b and c
- b,c and d
- a,c and d
- a,b and d
Q6:- a. supply voltage
b. excitation current
c. max value of load angle
the max power developed by synchronous motor is a function of which of the above
- a and b
- a and c
- b and c
- a,b,and c
Q7:- Which of the following method gives more accurate result fo determination of voltage regulation of an alternator
- mmf method
- synchronous impedance method
- potier triangle method
- american institution standard method
Q8:-Which one of the following is not a necessary condition to be satisfied for synchoronizing and incoming alternator to an already operating alternator?
- same vlotage magnitude
- same frequency
- same prime mover speed
- same phase sequence
Q9:-Which of the following statement is correct ? A smaller gap in a poly phase I.M. helps to
- reduce the chances of cawling
- increase the starting torque
- reduce the change of cogging
- reduce the magnetizing current
Q10:- In computer printer driver which motor is suitable
- reluctance motor
- hysteresis motor
- shaded pole motor
- stepper motor
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