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A ribbed cylinder of outside diameter 0.6m is at a surface temperature of 260℃ in large surroundings at 20℃. Calculate the heat transfer coefficient for radiation, and the total heat loss rate due to radiation and convection. The cylinder is 0.9m long and is made of cast iron of emissivity 0.8. The surface area of the ribbed cylinder is 5 m2. and the heat transfer coefficient for convection may be taken as 8.8 W/m2K. Neglect end effects.
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Which statement is true regarding the energies of the bonds that break and form during a highly endothermic reaction?
| The energy needed to break the required bonds is less than the energy released when the new bonds form. |
| The energy needed to break the required bonds is about the same as the energy released when the new bonds form. |
| The energy released when the required bonds break is less than the energy absorbed when the new bonds form. |
| The energy released when the required bonds break is greater than the energy absorbed when the new bonds form. |
| The energy needed to break the required bonds is greater than the energy released when the new bonds form. |
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Consider the following time series data:
Week 1 2 3 4 5 6
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Value 18 13 16 11 17 14
Using the naïve method (most recent value) as the forecast for the next week, compute the following measures of forecast accuracy.
A. mean absolute error
B. mean squared error
C. mean absolute percentage error
d. What is the forecast for Week 7?
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C&A sells 600 bottles of a dietary supplement per week at $100 per bottle. The supplement is ordered from a supplier who charges C&A $30 per order and $50 per bottle. C&A’s annual holding cost percentage is 40%. Assume C&A operates 50 weeks in a year. What is C&A’s total ordering and holding cost per year if C&A orders 500 bottles at a time?
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following are two weekly forecasts made by two different methods for the number of gallons of gasoline, in thousands, demanded at a local gasoline station. Also shown are actual demand levels in thousands of gallons:
Forecasts
week Method 1 Method 2 Actual Demand
1 0.90 0.80 0.70
2 1.05 1.20 1.00
3 0.95 0.90 1.00
4 1.20 1.11 1.00
The MAD method 1 = ??? thousand gallons... 2. The absolute deviatin based on the forecast developed using Method 1 adds to ??? thousand gallons. Mean squared error (MSE) is the average of (actual-Forecast). from the information given in method 1 , the value of n=4. the value E(autal-forecast) will be??? thousand gallons.
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1) Which of the following is the Pareto principle?
The majority of problems can be explained by one root cause.
The majority of problems can be explained by a few root causes.
The majority of problems can be explained by a many root causes.
The majority of problems can be explained by many symptoms.
The majority of problems can be explained by a few symptoms.
2) Which of the following statements about Kanban are accurate?
a.Deploying the Kanban system leads to pulling work through the system instead of pushing work.
b.Deploying the Kanban system leads to pushing work through the system instead of pulling work.
c.The Kanban system controls the work-in-process inventory.
d.Kanban will always reduce the amount of inventory in the process.
e..Kanban requires cross-training all workers.
f.A and B
g.A and C
h.A and D
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Tom Johnson Manufacturing intends to increase capacity through the addition of new equipment. Two vendors have presented proposals. The fixed costs for proposal A are? $50,000, and for proposal? B, $70,000. The variable cost for A is? $12.00, and for? B, $10.00. The revenue generated by each unit is? $20.00.
The two alternatives would yield the same profit? (loss) if the volume of outputequals= _____units ?(enter your response as a whole? number).
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Joseph Biggs owns his own ice cream truck an drives 30 miles from a florida beach resort. The sale of his products is higly dependent oh his location and on the weather. At the resort, his profit will be $120 per day in fair weather, $10 per day in bad weather. At home, his profit will be $70 in fair weather and $55 in bad weather. Assume that on any particular day, the weather service suggests a 40% chance of foul weather.
A) Construct Joseph's decision tree.
B) What is the decision recommended bat the expected value criterion?
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