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.Management Sciences
Category: Electrical Engineering Mcqs
Artificial draught is produced by____________?
0
A. air fans
B. steam jet
C. fan or steam jet
D. all of the above
In an automatic control system which of the following elements is not used ?
A. Error detector
B. Final control element
C. Sensor
D. Oscillator
The shape of the torque/slip curve of induction motor is__________?
A. parabola
B. hyperbola
C. rectangular parabola
D. straigth line
A voltage divider consists of two 68 kΩ resistors and a 24 V source. The unknown output voltage is______________?
A. 12 V
B. 24 V
C. 0 V
D. 6 V
The minimum armature current of the synchronous motor corresponds to operation at______________?
A. zero power factor leading
B. unity power factor
C. 0.707 power factor lagging
D. 0.707 power factor leading
In a vibrating reed frequency meter the natural frequencies of two adjacent reeds have a difference of___________?
A. 0.1 Hz
B. 0.25 Hz
C. 0.5 Hz
D. 1.5 Hz
For making a capacitor, it is better to select a dielectric having___________?
A. low permittivity
B. high permittivity
C. permittivity same as that of air
D. permittivity slightly more than that of air
A single core cable used on 33000 V has conductor diameter 10 mm and the internal diameter of sheath 25 mm. The maximum electrostatic stress in the cable is____________?
A. 62 x 105 V/m
B. 72 x 105 V/m
C. 82 x 105 V/m
D. 92 x 105 V/m
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