EPD 251 10th Exam Questions with Correct Answers

EPD 251 10th Exam Questions with Correct Answers And a base meter has terminals located on the back side of the meter - Answer-False The resistor is the part of a watt hour meter that introduces a retarding effect on the disk - Answer-False List the six basic parts of a watt hour meter - Answer-Cover Retardimg magnet Register Rotating meter disk Stater Base The basic principles of operation of the electro mechanical watt hour meter introduce around 1900 are totally different from those of today's electro-mechanical meters - Answer-False The interaction of the current and potential coil flexes and the induced eddy current flexes in a meter disc produce disc rotation - Answer-True Which of the following are types of watt hour meter bases - Answer-E. Both a and d The voltage rating on a meter nameplate indicates the voltage rating of The Meters potential coil or coils - Answer-True The rating in amps of a meters current coils is called - Answer-Class All polyphase meters have two or more Staters - Answer-True When the voltage requirements of a customer exceed the rating of a self-contained meter which of the following instrument Transformers are needed in conjunction with a Transformer rated meter to measure the customers loads - Answer-C. Both a and b Which of the following is an example of a self-contained meter class - Answer-Class 200 The tests which use in conjunction with a Transformer rated meter is used to the energized the customers loads while the meter is being tested - Answer-False Transformer rated meters are used when voltage and or current exceeds the ratings of self contained meters - Answer-True When a comparison test is made on a watt hour meter the current through the meter the test standard and the Phantom load are all the same - Answer-True As found accuracy test on self contained meters are typically made at what two power levels - Answer-Full load ( 15 amps ) Light load ( 1.5 amps )