1. One hundred (100) parts were tested for 10 hours, and 10 failures occurred during the...
1. One hundred (100) parts were tested for 10 hours, and 10 failures occurred during the test.
The times when the failures occurred are 1, 3, 6, 2, 3, 6, 8, 9, 2, and 1 hour, respectively. What is the failure rate?
2. Field data have indicated that Unit A has a failure rate of 0.0004 failure per hour. Calculate the reliability of the unit for a 150-hour mission.
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1. One hundred (100) parts were tested for 10 hours, and 10
failures occurred during the...
Need 2-8 - CHAPTER QUESTIONS Reliability 245 1. Definere blir ne reliability in your own words....
Need 2-8
- CHAPTER QUESTIONS Reliability 245 1. Definere blir ne reliability in your own words. Describe the key elements and why they are important 2. Describe the three phases of the life syde curve. Drew the curve and label it in detail (the axes, phases, type of product failure, etc.). 3. Determine the failure rate for the following You have tested circuit boards for failures during a 300-hour continuous use test. Four of the 25 boards tailed. The first...
(1)The field test data in respect of 172 components is as given below. In the life-testing...
(1)The field test data in respect of 172 components is as given below. In the life-testing of 100 specimens of a particular device, the number of failures during each time interval of twenty hours is shown in Table below. Estimate and Plot: the hazard function, failure density and reliability function. Time/Hours Failure 0-1000 59 1000-2000 24 2000-3000 3000-4000 4000-5000 5000-6000 29 30 17 13 (1) calculate the reliability of the system shown in the figure below 0.8 5 0.8 0.9...
2. A medical equipment manufacturer, has subjected 100 heart pacemakers to 5,000 hours of testing. Halfway...
2. A medical equipment manufacturer, has subjected 100 heart pacemakers to 5,000 hours of testing. Halfway through the testing, 5 of the pacemakers failed. What was the failure rate in terms of: a) Percent of failures? b) Number of failures per unit-hour? c) Number of failures per unit-year? d) If 1,100 people receive pacemaker implants, how many units can we expect to fail during the following 1 year!
About 1% of a certain type of LED diodes fails during a 24-hour test. Failures are assumed to be independent. Consider a lightstrip consisting of 10 such LED diodes. Let X be the number of LED diodes that fail during the 24-hour test. i) What distributio
About 1% of a certain type of LED diodes fails during a 24-hour test. Failures are assumed to be independent.Consider a lightstrip consisting of 10 such LED diodes.Let X be the number of LED diodes that fail during the 24-hour test.i) What distribution does X follow?ii) What is the probability that the lightstrip will burn for the full 24-hour test with no LED diodes failure?iii) What is the probability that the lightstrip will lose at least 3 LED diodes during...
c) Assume one of the cluster nodes fails every 100 hours. Other parts of the cluster never fail. Steps 1 through 3 take two hours. On average, the mean time for step 4 is two hours. What is the availa...
c) Assume one of the cluster nodes fails every 100 hours. Other parts of the cluster never fail. Steps 1 through 3 take two hours. On average, the mean time for step 4 is two hours. What is the availability of the cluster? What is the yearly failure cost if each one-hour downtime costs £2000? [10 marks] d) Following Part (b), assume that the cluster now has much increased availability support. Upon a node failure, its workload automatically fails over...
QUESTION 1 One hundred samples of several different plant parts were placed in each of six...
QUESTION 1 One hundred samples of several different plant parts were placed in each of six sealed containers of equal the beginning was 250 mL. After 2 days, it was at the level shown in the table. volume. The amount of CO2 present in the containers at Plant Part Light ColorTemp(oO Container Plant Type Avg CO2 (mL)** Leaf Leaf Stem Root Leaf Red Red Blue ue 15 27 21 27 27 50 200 300 150 Oak Oak Orange ** average...
On hundred and fifty-one (151) De Anza College students were surveyed and asked two questions: (1)...
On hundred and fifty-one (151) De Anza College students were surveyed and asked two questions: (1) How many units are you taking this quarter, and (2) How many hours of television do you watch per day. The chart below summarizes the data. We wish to conduct a hypothesis test to determine if the number of units a student takes is independent of the number of hours per day of television the student watches. Number of units Hours of T.V. per...
The following transactions occurred in a merchandising business that was incorporated in the month of October...
The following transactions occurred in a merchandising business that was incorporated in the month of October The numbers beside the transactions represent the day of the month the transaction occurred. The company is using a sales price per unit of S10. Assume the company uses FIFO as its cost flow assumption. There are no discounts (for sales or purchases) in this problem 1. JOURNAL ENTRIES: Prepare an appropriate journal entry for each of the following transactions 1 The organization issued...
Question 1: An undergraduate business student has purchased a laptop computer for use during exams. This...
Question 1: An undergraduate business student has purchased a laptop computer for use during exams. This laptop is perfectly reliable except for two parts: its microchip, which has a MTBF=20 hours; and its battery, which has a MTBF=10 hours. Also, on average the battery will wear out in five hours, with a standard deviation of 30 minutes. Assuming that a new battery has just been installed, what is the probability that the laptop will perform reliably during a one-hour exam?...
6. Doctor's order says: 2 L of D5W 1/2 Normal Saline to infuse over 48 hours....
6. Doctor's order says: 2 L of D5W 1/2 Normal Saline to infuse over 48 hours. What is the hourly rate? 7. Doctor's order says: 300 mL of Normal Saline to infuse over 6 hours. What is the hourly rate? 8. Doctor's order says: 100 mL Ceftriaxone Sodium 1G to infuse over 30 minutes. What is the hourly rate? 9. 280 mL of epoprostenol (FLOLAN) is to be infused over 2 hours using a volumetric pump. The drop factor of...
Need 2-8
- CHAPTER QUESTIONS Reliability 245 1. Definere blir ne reliability in your own words. Describe the key elements and why they are important 2. Describe the three phases of the life syde curve. Drew the curve and label it in detail (the axes, phases, type of product failure, etc.). 3. Determine the failure rate for the following You have tested circuit boards for failures during a 300-hour continuous use test. Four of the 25 boards tailed. The first...
(1)The field test data in respect of 172 components is as given below. In the life-testing of 100 specimens of a particular device, the number of failures during each time interval of twenty hours is shown in Table below. Estimate and Plot: the hazard function, failure density and reliability function. Time/Hours Failure 0-1000 59 1000-2000 24 2000-3000 3000-4000 4000-5000 5000-6000 29 30 17 13 (1) calculate the reliability of the system shown in the figure below 0.8 5 0.8 0.9...
QUESTION 1 One hundred samples of several different plant parts were placed in each of six sealed containers of equal the beginning was 250 mL. After 2 days, it was at the level shown in the table. volume. The amount of CO2 present in the containers at Plant Part Light ColorTemp(oO Container Plant Type Avg CO2 (mL)** Leaf Leaf Stem Root Leaf Red Red Blue ue 15 27 21 27 27 50 200 300 150 Oak Oak Orange ** average...
On hundred and fifty-one (151) De Anza College students were surveyed and asked two questions: (1) How many units are you taking this quarter, and (2) How many hours of television do you watch per day. The chart below summarizes the data. We wish to conduct a hypothesis test to determine if the number of units a student takes is independent of the number of hours per day of television the student watches. Number of units Hours of T.V. per...
The following transactions occurred in a merchandising business that was incorporated in the month of October The numbers beside the transactions represent the day of the month the transaction occurred. The company is using a sales price per unit of S10. Assume the company uses FIFO as its cost flow assumption. There are no discounts (for sales or purchases) in this problem 1. JOURNAL ENTRIES: Prepare an appropriate journal entry for each of the following transactions 1 The organization issued...
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