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Q2: Choose the correct answer for the following questions (25 marks) 1- In wireless DAQ systems, the network that contains a coordinator node and a number of router nodes that can communicate with each other is called: a. Mesh network b. Pair network c. Cluster tree network d. Star network 2- In data analysis, aperiodic signals are a. Sine waves. b. Digital Signals c. Analog Signals d. None of them. 3- An Analog Signal is continuous in both . a. frequency and power b. time and amplitude c. frequency and time d. time and power 4- In what terms, fatigue life is measured? c. Stress of failure d. Appearance of fracture a. Time of failures b. Number of cycles of failure 5- An ADC with a range of -10V to +15V and a step size of 0.005 V. Therefore, the number of bits the ADC must have is a. 12.5 b. 10 C. 14 d. 12 Page 1 of 3 6- The information is presented as pictures when ------------ method is used. a. Ultrasonic testing b. Magnetic particles testing c. Radiographic testing d. Eddy current testing 7- If the statistical features of a captured signal are not changing with time, then the signal is called. a. Random and b. Deterministic and c. Deterministic and d. Non-deterministic and stationary signal stationary signal periodic signal nonstationary signal