P3-7- For the following Cuatrol systam Fined the w overall T-FCCIA) by using B-O-R-- Hs Go2las Ris)- Hz Hi Ha Fig P3.7.Contrud getem fem

Four electricians are discussing wiring under raised floors in information technology equipment rooms. Electrician A says that wiring under the raised floor requires fire-resistant walls, floors, and ceilings between other occupancies. Electrician B says that wiring under the raised floor requires fire resistant halfway up the walls and floors between other occupancies. Electrician C says that the room must employ a disconnecting means that removes half of the power to all equipment in the room. Electrician D says that a disconnecting means isn't necessary for the room. Which of the following statements is correct? A. Electrician B is correct. B. Electrician D is correct. C. Electrician A is correct. D. Electrician C is correct.

When using an oscilloscope for testing engine management systems, what is an attenuator used for? In your answer provide an example of when an attenuator should be used. (5 - 10 words)