41. To measure the transient temperature in a heat exchanger that fluctuates bet

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41. To measure the transient temperature in a heat exchanger that fluctuates between 25C and 100C in 2.5s what should be the minimum sampling rate? a. 0.8 Hz b, 0.4 Hz c, 0.2 Hz d, 0.1 Hz 42. The natural frequency of beam is at 120 Hz. What should be the minimum sampling rate used for an accelerometer? a. 120 b. 240 c. 60 d. 200 43. To check whether a data acquisition system has enough sampling rate which instrument can be used? a. Oscilloscope b. Digital Multimeter c, Function Generator d. Power Supply 44. To check whether a resistance is 1.5 kS2 which instrument can be used? a. Oscilloscope b. Digital Multimeter c. Function Generator d Power Supply 45. When the frequency response of an accelerometer is 22 kHz, what does it mean? a. The sensor can measure 22kHz data better b. The sensor resonance is at 22 kHz c. The sensor can measure frequencies up to 22 kHz d. This information is not really important 46. For the same size beams, do you expect which one would have a higher first natural frequency? a. Steel b. Aluminum c. Plexiglass d. The material doesn't matter 47. If we put an accelerometer on a node in a vibrating beam, what would it measure? a. The highest amplitude b. Theoretically infinity c. The lowest amplitude d. Theoretically zero 48. The secondary coil off an LNDT is connected to which one in the SC-2345 box? (don't need to open the box) a. The AI module b. The TC module c. The SG module d The RI y

Explanation / Answer

52. Edge detection method is used to measure velocity in a image processing of tennis ball

50.The strain guage is mount at higher moment.

46.incase of natural frequency material doesn't matter

45.the sensor reasonace at 22kHz

42.the answer should be 240

44.digital multimeter is used.

47.accelerometer is used to measure highest amplitude.

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