GETCO Exam Paper (22-07-2015) Slip at maximum torque depends on load current stator reactance rotor resistance and reactance stator resistance load current stator reactance rotor resistance and reactance stator resistance ANSWER EXPLANATION DOWNLOAD EXAMIANS APP at maximum torque:S=R₂/X₂
GETCO Exam Paper (22-07-2015) The PU impedance of a 1089 MVA, 33 kV generator is 1, the ohmic value of its impedance is: 0.5 100 10 1 0.5 100 10 1 ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) Current chopping phenomenon is related to resistance switching asymmetrical current small inductive current capacitance switching resistance switching asymmetrical current small inductive current capacitance switching ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) Which of the following is the wrong statement in terms of slack bus? voltage and angle is specified at this bus it should be the largest generator bus in the system it has finite reactive power generation capability it should be located at the centre of the area voltage and angle is specified at this bus it should be the largest generator bus in the system it has finite reactive power generation capability it should be located at the centre of the area ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) Which of the following breaking method save energy? dynamic breaking resistor breaking regenerative breaking plugging dynamic breaking resistor breaking regenerative breaking plugging ANSWER EXPLANATION DOWNLOAD EXAMIANS APP three types of electric breaking:Regenerative breaking( leads to economic and energy consevation)pugging (more efficient method of breaking)rheostatic breaking
GETCO Exam Paper (22-07-2015) Two watt meter method for 3 phase circuit is preferred over other methods because it can be used for balanced or unbalanced load it can be used for star or delta connected load all are correct PF of the load can also be estimated it can be used for balanced or unbalanced load it can be used for star or delta connected load all are correct PF of the load can also be estimated ANSWER DOWNLOAD EXAMIANS APP
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