MGVCL Exam Paper (30-07-2021 Shift 2)
નીચે માંથી ક્યાં રુઢિપ્રયોગનો અર્થ 'છેતરવું' એવો થાય

દસ મારવો
હથેળીમાં ચાંદ દેખાડવો
બે પાંદડે થવું
આડા ઉતરવું

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MGVCL Exam Paper (30-07-2021 Shift 2)
Which of the following does the term 'feeder automation' include?

substation reactive power control
feeder remote point voltage control
All of these
automatic reclosing

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MGVCL Exam Paper (30-07-2021 Shift 2)
A three-phase 400 V, 6-pole, 50 Hz squirrel-cage induction motor is running at a slip of 5%. The speed of rotor with respect to stator magnetic field and speed of the stator magnetic field with respect to rotor magnetic field are

950 rpm, zero
-50 rpm, zero
-50 rpm, 1000 rpm
950 rpm, 1000 rpm

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MGVCL Exam Paper (30-07-2021 Shift 2)
Which one of the following statement is TRUE?

Underground cables are laid at sufficient depth to avoid being unearthed easily due to removal of soil.
In the cables, the location of fault is usually found out by comparing the capacitances of insulated conductors.
The current carrying capacity of cables in DC is less than that in AC.
In the cables, sheaths are used to provide enough strength.

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MGVCL Exam Paper (30-07-2021 Shift 2)
A generating station having 'n' section busbars each rated at Q kVA with ×% reactance is connected on the tie-bars systems through busbar reactances of b%. Determine the short circuit kVA if a 3-phase fault takes place on one section.

Q[(1/x) + (n+1)/(bn+x)]
Q[(1/x) + (n-1)/(bn+x)]
Q[(1/x) + (n+1)/(bn-x)]
Q[(1/x) - (n+1)/(bn-x)]

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

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