GURU MCQs provides Electrical Engineering MCQs for Job Test and Interview Preparation, suitable for fresh graduates, students, and competitive exams. Most repeated Electrical Engineering MCQs section is frequently encountered in CSS, PMS, Inspector, ASI, Sub-inspector, Constable, FPSC, PPSC, ETEA, FIA, Police, Army, Navy, Airforce, IB, MOFA, ASF, LHC, Educators, and various other competitive exams, as well as government and private job assessments. Electrical Engineering most repeated MCQs include Analog and Digital Communications, Control Systems, Power Electronics, Electric Circuits, Electric machines, Electrical measurement & units, Utilization of Electrical Energy, Basic Electrical Engineering, Electrical Installation, Power Systems, Testing & maintenance of electrical equipment’s – and much more.
**121. The effect of corona can be detected by?**
A. presence of ozone detected by odour
B. hissing sound
C. faint luminous glow of bluish colour
D. **all of the above**
**122. For transmission of power over a distance of 500 km, the transmission voltage should be in the range?**
A. **150 to 220 kV**
B. 100 to 120 kV
C. 60 to 100 kV
D. 20 to 50 kV
**123. In the analysis of which of the following lines shunt capacitance is neglected?**
A. **Short transmission lines**
B. Medium transmission lines
C. Long transmission lines
D. Medium as well as long transmission lines
**124. When the interconnector between two stations has large reactance?**
A. the transfer of power will take place with voltage fluctuation and noise
B. the transfer of power will take place with least loss
C. **the stations will fall out of step because of large angular displacement between the stations**
D. none of the above
**125. The frequency of voltage generated, in case of generators, can be increased by?**
A. using reactors
B. increasing the load
C. **adjusting the governor**
D. reducing the terminal voltage
E. none of the above
**126. When an alternator connected to the bus-bar is shut down the bus-bar voltage will?**
A. fall
B. **rise**
C. remain unchanged
D. none of the above
**127. The angular displacement between two interconnected stations is mainly due to?**
A. armature reactance of both alternators
B. reactance of the interconnector
C. synchronous reactance of both the alternators
D. **all of the above**
**128. Electro-mechanical voltage regulators are generally used in?**
A. reactors
B. **generators**
C. transformers
D. all of the above
**129. Series capacitors on transmission lines are of little use when the load VAR requirement is?**
A. large
B. small
C. **fluctuating**
D. any of the above
**130. The voltage regulation in magnetic amplifier type voltage regulator is effected by?**
A. electromagnetic induction
B. varying the resistance
C. **varying the reactance**
D. variable transformer