Note: (1) Answer Four questions only (2) The total marks attainable per question are 25 01: Choose the correct answer fo

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Note 1 Answer Four Questions Only 2 The Total Marks Attainable Per Question Are 25 01 Choose The Correct Answer Fo 1 (120.74 KiB) Viewed 30 times

Note: (1) Answer Four questions only (2) The total marks attainable per question are 25 01: Choose the correct answer for the following questions (25 marks) 1- A motor running at 1450 rpm is installed with a fan that has seven blades. Thus, the blade pass frequency equals: a. 150.5 Hz b. 169.1 Hz c. 170 Hz d. 173.3 Hz as fast as the highest frequency of the 2- According to Nyquist theorem, the sampling rate should be signal being measured or sampled. a. hundred times b. ten times c. twice d. thrice 3- Continually monitoring performance for signs of a need for maintenance is known as: a. Preventive c. Corrective b. Run to breakdown d. Condition-based maintenance maintenance maintenance 4- The Brinell hardness number is not a function of a. Ball diameter b. Impression diameter c. Surface roughness d. Load 5- Permanent deformation of material with respect to time due to constant load and the variable temperature is known as: Elasticity b. Fatigue c. Hardness d. Creep a. -------- it is the sensor's ability to give measures as close as possible to the real values: 6- a. Accuracy b. Resolution c. Precision d. Sensitivity 7- Data acquisition is the process in which physical variables from the real world are b. Converted into a digital format for processing d. None of the above a. Converted into electrical signals c. Both a. and b