Topic Assessment 6 Percentage Impedance PDF

Dashboard / My courses / EL25 - Test and connect transformers / Topic Assessments / Topic Assessment 6 Percentage Impedance (60 min) Started on Thursday, 8 August 2024, 3:41 PM State Finished Completed on Thursday, 8 August 2024, 3:42 PM...

Dashboard / My courses / EL25 - Test and connect transformers / Topic Assessments / Topic Assessment 6 Percentage Impedance (60 min) Started on Thursday, 8 August 2024, 3:41 PM State Finished Completed on Thursday, 8 August 2024, 3:42 PM Time taken 1 min 45 secs Marks 4.00/4.00 Grade 100.00 out of 100.00 Feedback Congratulations you have achieved 100%. Good luck with your continued studies. Question 1 Correct Mark 1.00 out of 1.00 Topic Assessment 6 Percentage Impedance Question 1 Review the statement/s carefully and indicate True or False. Statement True/False The percentage impedance (Z%) of a transformer is the voltage drop expressed as a percentage of the rated True primary voltage when full load current flows in the primary and secondary windings with a short connected  across the secondary terminals. Your answer is correct. Question 2 Correct Mark 1.00 out of 1.00 Topic Assessment 6 Percentage Impedance Question 3 Review the statement/s carefully and indicate True or False. Statement True/False To measure impedance, the primary winding of the transformer is short circuited and measuring instruments False are connected to measure the primary voltage at full load current  Your answer is correct. Question 3 Correct Mark 1.00 out of 1.00 Topic Assessment 6 Percentage Impedance Question 3 Identify the correct order of the following steps to measure impedance: Process Step Order The secondary winding of the transformer is short circuited and measuring instruments connected 1  Readings on the voltmeter and ammeter are noted 3  % impedance calculations are carried out using the values obtained during testing 4  2  The applied voltage is adjusted until the transformer under test is carrying its rated full-load current Your answer is correct. Question 4 Correct Mark 1.00 out of 1.00 Topic Assessment 6 Percentage Impedance Question 4 A 3,000/240V transformer has a measured impedance voltage of 82 V on it’s high voltage windings. Calculate the impedance percentage (Z%) of the transformer: Select one: 6.56% 2.73% 34.17% 8.00% Your answer is correct. ◄ Topic Assessment 5 Transformer Voltage Regulation (60 min) Jump to... Topic Assessment 7 Parallel Operation of Transformers (60 min) ►