Question 160Electricity/Electronics - Assistant Engineer70% to pass
In testing a hand cranked megger prior to use, what statement is true?
AI Explanation
The correct answer is C) With the test leads shorted, the pointer should go to zero ohms, and with the tests leads open, the pointer should go to infinite ohms.
This is because a hand-cranked megger is designed to measure the resistance of an insulation circuit. With the test leads shorted, the megger should read zero ohms, indicating no resistance. With the test leads open, the megger should read infinite ohms, indicating an open circuit with maximum resistance.
The other options are incorrect because they do not accurately describe the expected behavior of a properly functioning hand-cranked megger during this test.
Related Questions
#158 In which of the situations listed will a megohmmeter give the most accurate readings? #159 When a megohmmeter is being used to test insulation resistance, current leakage along the surface of the insulation is indicated by a very specific megohmmeter pointer movement. What would be the characteristic of the pointer movement under these conditions? #161 As shown in figure "A" of the illustrated motor nameplate, how much current could the motor safely draw on a continuous basis at sea level without overheating? Illustration EL-0171 #162 Which of the following motors has a frame configuration for solid base mounting only? Illustration EL-0184 #163 What is the most practical method of controlling the RPM of a multi-speed AC motor operating at a constant frequency?