MGVCL Exam Paper (30-07-2021 Shift 2)
The single line diagram of the simple power system is shown in figure the corresponding reactance diagram is

D
C
A
B

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MGVCL Exam Paper (30-07-2021 Shift 2)
The voltage applied to a transformer primary is increased keeping V/f constant. With this, the core loss ____ and the magnetizing current (Im) ____

increases, increases
decreases, increases
remains constant, decreases
increases, remains constant

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MGVCL Exam Paper (30-07-2021 Shift 2)
The wind speed increases with height because of

reduction of drag effect of the earth surface
reduction in lift effect of the air
enhancement of drag effect on the earth surface
reduction in the gravitational force

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MGVCL Exam Paper (30-07-2021 Shift 2)
Which one of the following statement with respect to Aerial Bunched Cables (ABC) system is TRUE?

ABC system is not suitable for rural electrification which are situated in difficult terrain, hills, forests and coastal areas.
ABC system totally eliminates the fault on lines and thereby improving the quality of supply.
The overall cost of the ABC system is very high as compared to the bare conductor system.
ABC system requires more clearance, insulators and high maintenance.

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MGVCL Exam Paper (30-07-2021 Shift 2)
A three-phase, 12 kV, 50 Hz and 300 kW load is operating at 0.8 pf lag. If the pf is to be improved to unity, using star connected capacitor, the per phase value of the reactive VAR required is:

50 kVAR
25 kVAR
75 kVAR
100 kVAR

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