3) A piece of machinery is placed in the corner of a manufacturing area (to get it as far away from asmany people as possible). If the machinery is generating 96 dB of sound power, what soundpressure level would be experienced my someone standing 1 meter from the machine? (Assume nocorrection is necessary for atmospheric temperature or pressure).dB for 25 minutes:

To determine the sound pressure level at a distance of 1 meter from the machinery, we need to use…

Answered: 3) A piece of machinery is placed in…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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5) A piece of machinery is enclosed in a sound-dampening cabinet, but you are concerned that the noise level is still too high for nearby workers. You make a measurement of absolute pressure exerted by the sound wave 1 ft outside the (closed) cabinet and find that the sound coming from it is 4.8 Pa. a) What is the sound pressure level at the location where you took the measurement? (i.e., 1 ft from the cabinet). b) You have been asked to draw a circle around the machinery cabinet to indicate the boundary beyond which hearing protection is not required. How far from the machinery must you be to be below the OSHA PEL of 90 dB (provide radius in ft)? c) If a worker spends 3 hrs working near the cabinet, what would their total dose be? Assume: 1) an 8-hr shift, 2) the average distance from the cabinet during the exposed portion of the shift is 1 ft (the same distance as the measurement), and 3) that the other 5 hrs had 0 exposure to noise. d) Should hearing protection be required? If so,…
Example 3.8.In Example 3.7 we considered a vacuum system with zero leaks. No real vacuum systems aretotally leak-free; engineers work very hard to keep the leakage rate as low as possible. If thetank in Example 3.7 has a leak of 0.0001 lbm/min of air, what will the pressure-time plot looklike, and what will be the final pressure? ex: 3.7 is posted
The question is important, Answer it correctly. 1. A ventilation fan is moving 3,200 cfm with a fan static pressure of 8.30" wg. The airflow is increased to 3,500 cfm by increasing the fan speed. What is the new static pressure of the fan?
Q1(b) A multi fluid manometer is shown in Figure Q1(b). Determine the following: (i) Determine height 'h' if the difference in pressure between the two pipes is 15.38 kPa; [6] (ii) Difference in pressure between the two pipelines if both pipes are in the same level. [6] Take density of air = 1kg/m3 and density of water = 1000kg/m3. Oil SG = 0.79 Gasoline SG =0.70 PIPE Air 45 cm hcm Pipe 22 cm 10 cm `Mercury SG= 13.6 Water Figure Q1(b)
Fluid mechanics -Q (1)
I did a venturi effect experiment which involved taking 15 mesurements. The opening of the damper at the end of the tube was increasing in increments of 0.5cm for each of the 15 mesurements. Then the change in length in manometer tube was recorded. the manometer tube used in this experiment wasn't vertical, it was horizontal with a slight incline. Room temperature and pressure were recorded at the start of experiment as well. As the opening of the damper increased from mesurements 1 to 15, the change in length of manometer tube also increase from 1 to 15. the bigger diameter of the tube is 140mm and the diameter of throat section is 89mm. The density of the fluid is 870 kg/m. Using this information workout all the equations on the image and also the mass flow rate which should be volumetric flow rate multiplied by density. Also workout the reynolds number. Workout all these to determine the relationship between mass flow rate, velocity value and reynolds number. Let me know if you want…

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