Question

In: Mechanical Engineering

Whether you are doing area sampling with a large, heavy, high-volume, variable-speed pump or personal sampling...

Whether you are doing area sampling with a large, heavy, high-volume, variable-speed pump or personal sampling with a small, light-weight, lower volume, variable-speed pump attached to the worker’s belt, what two procedures are critical for proper operation of the pump for sampling (and do not use “connect to power” or “connect the tubing”) for a specific contaminant?

Solutions

Expert Solution

1 Calibrate sampling pumps at the temperature and pressure (altitude) at which samples will be collected. If site conditions are substantially above or below room temperature, calibrate the pumps in a clean area at the site, if possible.

2.The sampling pump used to collect the sample must be compatible with the sampling needs and the media used. Specifically, the pump must be capable of maintaining the desired flow rate over the time period needed using the sampling media specified

3. All pumps should be calibrated with representative sampling media prior to use

4.The accuracy of determinating the concentration of a toxic substance in air is no greater than the accuracy with which the air volume is measured. Therefore, accurate calibration of the airflow rate through the sampling train is necessary

5. pumps must be recalibrated after each repair and if they have been abused

6.Ensure sampling pump batteries are fully charged


Related Solutions

1. One pump is not enough to pump water to a very high tank. If you...
1. One pump is not enough to pump water to a very high tank. If you use two pumps (to increase h), how are you going to install them? (a) in parallel (b) in series 2. For turbulent flow of all pipes, friction factor (f) depends on: (a) Reynolds number (Re) only (b) relative roughness (e/D) only (c) both Re and e/D 4. For a pumping system, which tends to cause cavitation? (a) placing the pump close to the source...
A pump is being powered by a 3-phase asynchronous AC motor. Without using a variable speed...
A pump is being powered by a 3-phase asynchronous AC motor. Without using a variable speed drive, explain two ways that you can adjust the flow rate in the system. How does a VSD control the flow rate?
Researchers doing a study of incomes in a large metropolitan area want to determine if residents...
Researchers doing a study of incomes in a large metropolitan area want to determine if residents in Suburban District 1 have different mean income from residents in Suburban District 2. They collected the data and found the following sample means and variances. Use these data to conduct a hypothesis test of their research question, using α = .05. Suburban District 1 Suburban District 1 Sample Size 50 49 Sample Mean 1 = 34,270 2 = 32,780 Sample Variance = 8740...
discuss how it is possible to achieve the benefit of large low cost and high speed...
discuss how it is possible to achieve the benefit of large low cost and high speed memory with the cache-main memory hierarchical organization? Discuss the two properties of computer programs that make it feasible to meet this goal
You are choosing a pump to go into a fire protection system in a high rise...
You are choosing a pump to go into a fire protection system in a high rise office building. You have narrowed your selection to three brands. The relevant information is presented in the table below. Assuming an interest rate of 5%, what is the most attractive choice?? Alternative A Alternative B Alternative C Type Add – Sum – Pressure HP Pumps Test – Me – Often Life 20 years 15 years 10 years Initial Cost $350,000 $300,000 $200,000 Maintenance $2,000...
Explain why the large surface area to volume ratio is so much more important to prokaryotic...
Explain why the large surface area to volume ratio is so much more important to prokaryotic adaptability than to a single eukaryotic cell in a multicellular organism?
Computer network Consider the high-speed Internet services available for a major metropolitan area with more than...
Computer network Consider the high-speed Internet services available for a major metropolitan area with more than two million residents. Discuss what physical medium(s) should be used for providing residential Internet access, enterprise Internet access (at companies and schools), and public Internet access (at shopping malls, train stations etc.). Briefly justify your answers from both budget and quality of service factors. Note that there might be multiple correct answers to each of the questions.
Consider a high-speed subsonic wind tunnel. The conditions in the large-diameter section upstream of the test...
Consider a high-speed subsonic wind tunnel. The conditions in the large-diameter section upstream of the test section are V = 228 mph and T = 540°R. At the test section, the temperature is 473°R and the pressure is 2 atm. (a) If a wind tunnel model, placed in the test section, has a wing chord of 12 in., what is the test Reynolds number based on that chord? (b) What is the overall smooth flat-plate skin friction coefficient of the...
Create two directionalhypotheses in an area in which you might be interested in doing research.
Create two directionalhypotheses in an area in which you might be interested in doing research.
You push a box at a constant speed across a level carpeted floor, doing a total...
You push a box at a constant speed across a level carpeted floor, doing a total of 100 Joules of work on the box. How much work is done by friction?
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT