GETCO Exam Paper (22-07-2015) In sub stations for making and breaking of load current isolators are used relays are used circuit breakers are used load interrupter switches are used isolators are used relays are used circuit breakers are used load interrupter switches are used ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) The breaking capacity of a CB is usually expressed interms of MVA volts amperes MW MVA volts amperes MW ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) Shunt capacitors in a substation consume active power delivers lagging VAR deliver active power consumes lagging VAR consume active power delivers lagging VAR deliver active power consumes lagging VAR ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) Slip at maximum torque depends on rotor resistance and reactance stator resistance load current stator reactance rotor resistance and reactance stator resistance load current stator reactance ANSWER EXPLANATION DOWNLOAD EXAMIANS APP at maximum torque:S=R₂/X₂
GETCO Exam Paper (22-07-2015) The rating of given on the name plate of a transformer indicates the: True power whichh it draws from the supply mains Apparent power which it draws from the supply mains Apparent power which it can supply True power which it can supply True power whichh it draws from the supply mains Apparent power which it draws from the supply mains Apparent power which it can supply True power which it can supply ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The rating of given on the name plate of a transformer indicates the:Apparent power which it can supply S=V( supplied voltage)*I (load current)active power = v* i*cosφreactive power = v* i*sinφ
GETCO Exam Paper (22-07-2015) For eliminating 7th harmonics from generated EMF in alternator the fractional pitch must be 2\3 5\6 7\8 6\7 2\3 5\6 7\8 6\7 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP fractional pitch = Cos( α/2)α is obtain from: (nα/2)=90˚ where n is harmonicα=25.7143˚fractional pitch=6/7
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