MGVCL Exam Paper (30-07-2021 Shift 1)
If a 415 V, 50 Hz, star-connected, three-phase squirrel-cage induction motor is operated from a 415 V, 70 Hz supply, the torque that the motor can now provide while drawing rated current from the supply

reduces
increases or reduces depending upon the rotor resistance
remains the same
increases

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MGVCL Exam Paper (30-07-2021 Shift 1)
નીચેના રુઢિપ્રયોગોને અર્થ સાથે સાંકળી જોડી બનાવો.
1. કાન કરડવા - 1. બાતમી મળી જવી.
2. કાન ફૂંકવા - 2. વાત પર ધ્યાન ન આપવું.
૩. કાને વાત પહોચવી - ૩. કાન

1-42-33-14-2
1-32-43-14-2
1-32-23-44-1
1-22-33-44-1

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MGVCL Exam Paper (30-07-2021 Shift 1)
Case 1: The PV connected to the DC bus was injecting 20 kW of power constituting of 1 kW of loss
Case 2: The same PV is connected to the AC bus constituting to 1.5 kW loss. Find out the change in efficiency from Case 1 to Case 2?

2.5% decrease
2.5% increase
5% decrease
5% increase

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