Q.1
Calculate the angular frequency of the waveform y(t)=69sin(40πt+4π).
  • a) 40π Hz
  • b) 60π Hz
  • c) 70π Hz
  • d) 20π Hz
Q.2
The generated e.m.f from 22-pole armature havingturns driven atrpm having flux per pole asmWb, with lap winding is ___________
  • a) 76 V
  • b) 77 V
  • c) 78 V
  • d) 79 V
Q.3
Calculate the phase angle of the sinusoidal waveform u(t)=154sin(9.85πt-π÷89).
  • a) -78π÷9
  • b) -12π÷5
  • c) -π÷89
  • d) -2π÷888
Q.4
Calculate the moment of inertia of the stick about its end having a mass ofkg and length ofcm.
  • a) .088 kgm2
  • b) .087 kgm2
  • c) .089 kgm2
  • d) .086 kgm2
Q.5
Calculate the moment of inertia of the stick about its center having a mass of 1.1 kg and length of 2.9 m.
  • a) .66 kgm2
  • b) .77 kgm2
  • c) .88 kgm2
  • d) .47 kgm2
Q.6
Calculate the value of the frequency if the capacitive reactance is .1 Ω and the value of the capacitor is .F.
  • a) 71.25 Hz
  • b) 81.75 Hz
  • c) 79.61 Hz
  • d) 79.54 Hz
Q.7
The slope of the V-I curve is 6.9°. Calculate the value of resistance. Assume the relationship between voltage and current is a straight line.
  • a) .38 Ω
  • b) .59 Ω
  • c) .34 Ω
  • d) .12 Ω
Q.8
Calculate the active power in anH inductor.
  • a) 8645 W
  • b) 6485 W
  • c) 0 W
  • d) 4879 W
Q.9
Calculate the active power in aF capacitor.
  • a) 581 W
  • b) 897 W
  • c) 0 W
  • d) 892 W
Q.10
Calculate the active power in aH inductor.
  • a) 28 W
  • b) 189 W
  • c) 4 W
  • d) 0 W
Q.11
Calculate the active power in anΩ resistor with .A current flowing through it.
  • a) 547.12 W
  • b) 474.24 W
  • c) 554.78 W
  • d) 123.88 W
Q.12
Which one of the following methods would give a lower than the actual value of regulation of the alternator?
  • a) ZPF method
  • b) MMF method
  • c) EMF method
  • d) ASA method
Q.13
Calculate the useful power developed by a motor using the given data: Eb =and I =A. Assume frictional losses are 3 W and windage losses are 2 W.
  • a) 203 W
  • b) 247 W
  • c) 211 W
  • d) 202 W
0 h : 0 m : 1 s