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# Aerospace Engineering

Aerospace engineering is the discipline that is concerned with the research, design, development, construction, testing, science and technology of aircrafts. This type of engineering is divided into two subsections, aeronautical engineering an astronautical engineering. Aerospace engineering deals with the physical properties of aircrafts, rockets, flying craft and spacecraftâ€™s and the science behind it. The field cover aerodynamic characteristics and behaviors of such objects.

Aircrafts are subject to demanding conditions that undergo extreme changes in atmospheric pressure and temperature. There are various technological and engineering disciplines that are required to consult on these objects that fall under the category of aerospace engineering.

The development and manufacturing of a modern flight vehicle is very complex. It demands careful balance and compromise between abilities, design, available technology and costs. Aerospace engineers design, test and supervise the manufacturing of aircraft, spacecraftâ€™s and missiles. They develop new technologies for use in aviation, defence systems and space.

### What are the components of an aircraft?

What are the main components of a commercial aircraft? What is the purpose of each component? The basic components that would be part of any flying vehicle such as a military or commercial aircraft but also an UAV.

### Digital Signal Processing and maintainability engineering

Note; Please see attachment for more clarification. TQEM 1: Digital Signal Processing (DSP) 1. ______A Gaussian (normal) random variable X has the following probability density function. The mean value and variance of X are, respectively A. (0, 8). B. (0, 2). C. (0, 4). D. (2, 4). E. (2, 8) 2. _____ Before samp

### Maintainability including shaft speeds and BPFI

Note: Please see attachment for more clarification. 1. An ultrasonic beam travels through a 4-inch thick aluminum alloy plate and strikes a body of water. The following data for aluminum alloy and water are given. (a) Calculate the acoustic impedances of aluminum alloy and water. Indicate units (b) Calculate the p

### Maintainability Engineering and Vibrational Analysis

Note: Please see attachment for more clarification 1. State four important and distinct equipment condition monitoring technologies used in predictive maintenance (condition-based maintenance) 2. State four important causes of vibration in rotating machinery. Each of the causes must be distinguishable as a function of the

### Pressure Tank System: Fault & Event Tree Formulation

Please see attachment for more clarification. Wet gas fills the pilot lines from the vertical separator to the scrubber pot and VOC incinerator with condensate causing freezing of the lines in cold weather as well as damage to regulators, solenoid and Kimray waste gas inlet valve. Given the initiating event that the gas ou

### Event and fault tree analysis, RRW importance measure

1. Calculate the expected (mean) value of the total risk of the system described by the event tree and fault trees below. Assume up indicates True in the event tree. The random variable distributions are specified in the table as: Normal (mean, standard deviation), Exponential (mean), Weibull (eta, beta), Uniform (lower bound, u

### Oil Analysis, acoustic impedance and ranking of components

1. What are the three important technical dimensions of lubrication oil analysis? 2. Define Total Acid Number (TAN) and Total Base Number (TBN) of lubrication oil and state their importance in machinery lubrication (this may require internet search). 3. An ultrasonic beam travels through an 8-inch thick carbon steel plate a

### Risk Importance Measurements

See the attached file for the full question. 1. For a given initiating event, a system has two hazard barriers, shown below. After an initiating event, if barrier X succeeds, the system is safe. If both barriers fail, then an Undesirable consequence occurs (100 injuries). If barrier X fails, but barrier Y succeeds, the conseq

### Event diagrams, Poisson & exponential failure processes

Note: Please see attachment for more clarification TQE #5 1. For a given initiating event, I, that occurs once every 5 years, there are three Hazard barriers to prevent loss of revenue: A, B, and C, triggered in that order. If Hazard barrier A performs, then the

### Bayesian analysis problems and solutions

Note: Please see attachment for more clarification TQ4 1. A product's failure time follows the Weibull distribution with the CDF: Where

### Shaft misalignment, vibrational analysis type multiple choice

1. The rotational speed of a pump shaft is 19.5 Hz. The frequency spectrum of accelerometers placed on inboard and outboard bearings in the vertical direction generally indicate shaft imbalance at a frequency of A. 19.5 Hz. B. 39 Hz. C. 9.75 Hz. D. Always a sub-synchronous value of shaft speed. 2. A ceiling fan has

### Intro to Maintainability DSP 3

TQ5 Indicate if the statement is true or false. If a statement is false, indicate the correct answer. 1. In vibration analysis, we often assume that an accelerometer signal is stationary. A stationary signal has the property that the statistical properties of the signal do not change with time. 2. The error due to unde

### Solutions on bearings, gears maintainability problems

NOTE: Please see attachment for more clarification TQ4 1. A signal is sampled at 100 samples/sec. It was later found that the original signal contained a frequency component at 60 Hz. Calculate the frequency at which the aliasing effect is seen in the power spectrum in the frequency range [0 50] Hz. 2. The stiffness, k, of

### Estimating nature of fault rate decreasing, increasing

A repairable diesel generator is monitored for 85 days. The following failure times are recorded: 2.3, 4.8, 8.1, 11.3, 17.3, 22.1, 31.3, 45.9, and 78.3. Do these times support a constant failure rate (Î± = 0.05)? if so, estimate the failure rate. If not, is the rate increasing or decreasing?

### Fault Tree and Event Tree Analysis

Note: Please see attachment for more clarification. TQ3 1. For the fault tree given below, a. Find the minimum cut sets b. If the probability of each basic event is 0.10, what is the approximate top event probability? Using the minimum cut sets, what

### Non Homogeneous Poisson Process, failure rates and analysis

NOTE: Please see attachment for more clarification TQ2 1. Suppose the failure time history of a component is given (where downward -facing arrows indicate failure times): a. Assume the failure process follows a NHPP with Î»(t) = exp(Î±+Î²t). Estimate the model p

### Reliability questions & solutions

Please see attachment for more clarification on Q5 1. Indicate whether the following statements are true or false. a) The time to failure of a component is distributed as follows (pdf): 1. Indicate whether the following statements are true or false. a) The time to failure of a component is distributed as follows (pdf

### Reliability & MTTF for constant failure rate paralleled systems

Please see attachment for more clarification Q1. Which one of the following is the correct definition of equipment monitoring? a. Managing the day to day work using equipment maintenance procedures and work management systems. b. Managing the reliability of mechanical, electrical, process, and instrumentation equipment.

### Reliability analysis and RBD

Please see attachment for more clarification for Q2 1. Find the minimum number of redundant components, each having a reliability of 0.4, necessary to achieve a system reliability 0.95. There is a common-mode failure probability of 0.03. 2. Determine the reliability of the system using Conditioning 3. Consider a c

### System reliability clarifications

Please see attachment for more clarification on question 1 1. Find the system reliability from the figure below. 2. Consider a system of 6 pumps of which at least 4 must function properly for system success. Each pump has an 85% reliability for the mission duration. Determine reliability of the system. 3. Suppos

### Serial and parallel connected failure components

1. Failure rate for item A is 0.002 failures/hr., item B is 0.0003 failures/hr. and item C is 0.001 failures/hr. The components are serially related with independent failure modes. What is the system reliability at 55 hrs? Please round your answer to 3 decimals. 2. A system has 2 components (component A and B) in parallel. Wh

### Reliability maths problems and solutions

Hello Sir, In order to save time and effort. You don't need to provided a detail solution like you did on the last two questions. Please use the direct formula and provide a brief solution and answer. Thank you for all your assistance. 1. A component experiences failures at a constant rate (CFR) with an MTTF of 1100 hou

### Reliability, failure analysis and problem solving

1. A Porsche GT3 Cup car's engine has a mean time between failures of 250 hours, where the failure rate is constant. Suppose that a certain race requires failure-free operation of the engine for 20 hours. What is the probability that the engine will complete the race without failure? Please round your answer to 2 decimals. 2.

### Relaibility and Failure statisitcs and maths

Please see attachment for PDF functions in question 1 - 3 1. A manufacturing company produces many different products for wholesale distribution. Its flagship product, a reverse cylindrical dipolar tube, has a failure distribution given by the following PDF: f(t)= {â–ˆ(0.000192t^2 0â‰¤tâ‰¤25 [email protected] els

### Probability and Reliability

Q1. A smoke detector is routinely inspected. 80% of the detectors found inoperative had experienced a power surge, and 10% of those found in operating condition had experienced a power surge. 20% of the detectors inspected have failed. What is probability of a detector failing given it experiences a power surge? Q2. The time

### 4 Pillars of Safety Management System

List and explain the "4 Pillars" of SMS. List and explain the "4 Pillars" of SMS. Assess their value in creating a "proactive and predictive" safety program. Remember, you must have a title page, 300 word body written in 3rd person, and at least two references.

### Weightlessness in Airplane Dynamics

An airplane flies with constant velocity along a circular path in the vertical plane. Th radius of the circular path is 5000 ft. The pilot weighs 150 lbs. a. Determine the velocity of the airplane required for pilot to experience weightlessness at the top of the circular path. b. Determine the force exerted on the piot by

### High school Yr 12 aeronautical Engineering Module - mechanics

PLease help- i seem to get the incorrect answer but didn't know where i have gone wrong? Problem: If each wing is to be 4.8m long and the lift force acts at 45% of the distance from the wing root, what will be the bending moment if the lift force is 9KN? What will be the bending stress if (Ixx = 1.8*10 power6 metres to the 10