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.Management Sciences
Category: Electrical Engineering Mcqs
Co-efficient of adhesion is________________-?
A. high in case of D.C. traction than in the case of AC. traction
B. low in case of D.C. traction than in the case of AC. traction
C. equal in both AC. and D.C. traction
D. any of the above
Zero initial condition for a system means_______________?
A. input reference signal is zero
B. zero stored energy
C. ne initial movement of moving parts
D. system is at rest and no energy is stored in any of its components
The voltage drop at anode, in a mercury arc rectifier is due to_____________?
A. self restoring property of mercury
B. high ionization potential
C. energy spent in overcoming the electrostatic field
D. high temperature inside the rectifier
Which of the following component, in a steam power plant, needs maximum maintenance attention?
A. Steam turbine
B. Condenser
C. Water treatment plant
D. Boiler
Series capacitors on transmission lines are of little use when the load VAR requirement is___________?
A. large
B. small
B. fluctuating
D. any of the above
For which of the following parameter variation, the capacitance of the capacitor remains unaffected ____________?
A. Distance between plates
B. Area of the plates
C. Nature of dielectric
D. Thickness of the plates
In a four-pole D.C. machine____________?
A. all the four poles are north poles
B. alternate poles are north and south
C. all the four poles are south poles
D. two north poles follow two south poles
Addition of zeros in transfer function causes which of the following ?
A. Lead-compensation
B. Lag-compensation
C. Lead-lag compensation
D. None of the above
A certain cable has an insulation of relative permittivity 4. If the insulation is replaced by one of relative permittivity 2, the capacitance of the cable will become_____________?
A. one half
B. double
C. four times
D. none of the above
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