Numerade

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RMU Switchgear Fault Investigation: The HV RMU switchgear supplying the transformer has tripped, causing a power outage. Tasks: a) Systematically troubleshoot this fault by detailing two actions for each of the following steps: · Observation · Problem Isolation · Identifying Possible Causes · Determining the Most Probable Cause · Testing and Repair Verification (5 marks) b) Name one critical safety document required before inspecting the tripped switchgear and briefly explain its purpose. (1 mark) c) The trip coil is suspected to be faulty. List two specific measurements that would verify its condition. (2 marks) d) Compare the hospital’s current time-based maintenance with condition-based maintenance (CBM). Provide: · One advantage of switching to CBM · One limitation of the current time-based approach. (2 marks)

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18. What is the square footage of space that is 13 feet, 6 inches by 8 feet, 6 inches A. 90 square feet, 4 inches B. 114 square feet, 9 inches C. 281 square feet D. 284 square feet, 7 inches

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10 1 point Blood plasma contains dissolved proteins and hormones. ? True ? False

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Which statement about dissociative amnesia is NOT true? Dissociative memory mainly affects autobiographical memory. Dissociative amnesia often begins when the patient is in his or her 30s or 40s. The 12-month prevalence of dissociative amnesia is roughly 2%. Dissociative amnesia affects men 3 times more often than it does women.

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Hints for HW#3 4.1 Provide an explanation for the relative reactivity relationships revealed by the following data a. The relative rates of solvolysis in aqueous acetone of several tertiary p- nitrobenzoate esters: R substituent CH$_3$ i-C$_3$H$_7$ t-C$_4$H$_9$ Phenyl Cyclopropyl CH$_3$ R\text{-}C\text{-}O_2C\text{-} CH$_3$ -NO$_2$ Relative rate 1.0 2.9 4.4 10$^3$ 5 \times 10$^5$

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8. Agreement and disagreement among economists Suppose that Sean, an economist from a research facility in Washington, and Yvette, another economist from a graduate program in the Northeast, are both guests on a popular science podcast. The host of the podcast is facilitating their debate over budget deficits. The following dialogue represents a portion of the transcript of their discussion: Yvette: Most people recognize that the budget deficit has been rising considerably over the last century. We need to find the best course of action to remedy this situation. Sean: I believe that a cut in income tax rates would boost economic growth and raise tax revenue enough to reduce budget deficits. Yvette: I actually feel that raising the top income tax rate would reduce the budget deficit more effectively. The disagreement between these economists is most likely due to Despite their differences, with which proposition are two economists chosen at random most likely to agree? Lawyers make up an excessive percentage of elected officials. Tariffs and import quotas generally reduce economic welfare. Minimum wage laws do more to harm low-skilled workers than help them.

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Problem 1. (20 points) Given a histogram from an image with 8 gray levels as shown 1) Use histogram equalization to find a mapping function between input pixel values and output pixel values. 2) Plot the histogram of the output image after histogram equalization. 3) Suggest another image enhancement tool that can also improve the appearance of this image. probability 0.30- 0.25 0.20 0.15 0.10 0.05 0 1 2 3 4 5 6 7 pixel value

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3. Consider the nuclear equation: \begin{equation*} ^2_1D + ^3_1T \to ^4_2He + ^1_0n + Q \end{equation*} Using the fact that the atomic masses of deuterium, tritium, and helium are $M_D = 2.01410$ a. u.; $M_{He} = 4.00260$ a. u.; $M_T = 3.01605$ a. u., and that the mass of a neutron is $m_n = 1.00866$ a. u., a. Calculate the energy released when a deuterium nucleus fuses with one of tritium. Express the result in MeV. (Note: 1 a.u. = $1.66 \times 10^{-27}$ kg; $c = 3 \times 10^8$ m/s; 1 eV = $1.60 \times 10^{-19}$ J) (1.5 points) b. Calculate the amount of energy released when one gram of deuterium is fused with the necessary amount of tritium. Express the result in Kwh. (Note: $N_A = 6.02 \times 10^{23}$ atoms) (1.5 points) c. Deuterium is a stable isotope of hydrogen and constitutes 0.015% of natural hydrogen. If we would extract deuterium from the hydrogen in water, how many liters of water per day would we need to run a one Gwatt power station? (2 points)

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2. A 3 m³ rigid tank contains hydrogen at 250 kPa and 550 K. The gas is now cooled until its temperature drops to 350 K. Determine a. The mass in the tank b. The final pressure in the tank c. The amount of heat transfer assuming constant specific heats.

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R(s)+ G_c(s) G_p(s) C(s) H(s) Figure 1. Feedback closed-loop system. 1. (15%) Consider the feedback closed-loop system in Figure 1 with $G_c(s)G_p(s)H(s) = \frac{10(s+12)}{s^4 + 20s^3 + (5k+116)s^2 + 50(k+3)s + 120(k-1)}$ where $k$ is a gain parameter that may take any value in the interval $[0, +\infty)$. a) Plot the root locus that gives the location of the closed-loop transfer function poles as parameter $k$ varies from 0 to infinity. You may use MATLAB yet clearly indicate breakaway points, crossings of the imaginary axis, and asymptotes, if any. b) Using Routh-Hurwutz criterion compute the range of nonnegative values, if any, for $k$ such that the system is stable and has its settling time $T_s$ strictly less than 1s (that is, $T_s < 1$). c) Find the nonnegative value of $k$ for which the closed-loop system has the minimal settling time while the damping ratio $\zeta$ is maximal. Compute that minimal value of $T_s$ and the corresponding maximal value of $\zeta$.

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shane y.