Answer Happy

Al. Comparing with measuring current transformer (MCT), which of the following statements about protection current transformer (PCT) is true? A) The accuracy of PCT is lower B) The magnetic saturation level of PCT is lower C) The burden of PCT is lower D) The accuracy limiting factor of PCT is lower A2. Which of the following about the colour temperature of a lamp is true? A) The lower the colour temperature, the longer will be the lamp life B) It reflects how well the colour of objects can be distinguished C) It is used to describe the colour appearance of the lamp D) The higher the colour temperature, the more efficiently the lamp converts electrical power into visible light A3. Which of the following propose that Rolling Sphere Method is/are used to determine of a structure according to BSEN 62305 - Protection against Lightning? A) The Class of the Lightning Protection System (LPS) B) The extent of the air-termination network C) The extent of the earthing-termination network D) All of above