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(b) Jaguh Sdn. Bhd has a factory which manufacture industrial hand gloves. The probability of an explosion at the factory depends on how much the firm spends on safety as given by the table. Expenditure (in RM millions) Probability of Loss 0.0 0.5 1.0 1.5 2.0 2.5 0.030 0.020 0.016 0.013 0.011 0.010 i. If an explosion occurs, the loss to society (e.g. damaged equipment, death of employees, etc) is expected to be at RM250 million. Find the optimal level of safety from a societal perspective. ii. Suppose that Jaguh Sdn. Bhd. has to pay only 50% of the losses that occur. Ignore the time value of money, what is the maximum loss control expenditure that Jaguh Sdn. Bhd. should spend on safety?

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Question 4. SkillAid noticed that the employees are spending too much time on social media. They launched a counselling service to restrain employees to spend long time on social media. The office recorded the number of employees who used social media sites 6 days before and after the counselling service. Before 22 72 95 39 45 55 After 37 55 97 27 63 57 Assume that the population of paired difference is approximately normally distributed. At 1% level of significance, use the rejection region and test the hypothesis that the counselling does not have any effect on employees to use social media sites in the office. (5 points)

Question 41 1 Point What is the average signal rate if NRZ-1 is used with a transfer rate of 20 Kbps? 10 KBaud 20 KBaud 40 KBaud D) None of the above

Three different methods for assembling a product were proposed by an industrial engineer. To investigate the number of units assembled correctly with each method, 30 employees were randomly selected and randomly assigned to the three proposed methods in such a way that each method was used by 10 workers. The number of units assembled correctly was recorded, and the analysis of variance procedure was applied to the resulting data set. The following results were obtained: SST -10,900, SSTR =4600. a. Set up the ANOVA table for this problem (to 2 decimals but p-value to 4 decimals, il necessary). Source of Variation Sum of Squares Degrees of Freedom Mean Square F p-value Treatments Error == Total b.Use a = 0.05 to test for any significant difference in the means for the three assembly methods. Calculate the value of the test statistic (to 2 decimals). ho The p-value is - Select your answer What is your conclusion? Select your answer

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18.

Stone mastic and open graded asphalt are used where reduced tyre noise is required.

Group of answer choices

True

False

20.

Open graded asphalt has lower air voids content than dense graded asphalt.

Group of answer choices

True

False

22.

Compaction is a process where the soil particles are rearranged over a few days to reduce the air voids.

Group of answer choices

True

False

23.

Test rolling is done to determine the number of passes required to achieve the desired level of compaction.

Group of answer choices

True

False

Problem 1) The following block flow diagram represents a closed loop process using a PI controller. D(S) Gd(s) ysp(s) ?(s), x(s) Gc(s) Gpls) y(s) Part a) (5 points) The process transfer function (GP) is first order plus deadtime (FOPDT) with a process gain of 3, a process time constant of 5, and a process deadtime of 1. Tune the PI controller using the Cohen Coon tuning method and plot the response of the process variable and the manipulated variable when the set point increases by a value of +1. Part b) (5 points) Determine the closed loop time constant and the overshoot based on the response from part a. Partc) (5 points) The disturbance transfer function (Gd) is first order plus deadtime (FOPDT) with a disturbance gain of 5, a disturbance time constant of 3, and a disturbance deadtime of 0.5. Use the controller settings from part a to plot the response of the process variable and the manipulated variable when Dincreases by a value of +1 (the setpoint remains unchanged, ysp = 0). Part d) (5 points) As the plant changes production rate, nonlinearity causes the process transfer function (p) to change. At the lower production rate, the process gain is 2.5. a process time constant is 4, and a process dead time is 1.5. The Pl controller has not been re-tuned (use the values of Kc and Tl from part a). Plot the response of the process variable and the manipulated variable when the set point increases by a value of +1 at the lower production rate. Is the controller response suitable? Parte) (5 points) Given the process transfer function at the lower production rate in Part d and using the controller settings from part a. plot the response of the process variable and the manipulated variable when D increases by a value of +1 (the setpoint remains unchanged, ysp = 0). Assume the disturbance transfer function is linear, and therefore does not change with production rate. Is the controller response suitable?