In aircraft accident investigation, an Air Detective Tip alluded to the investigative risk of “hindsight bias”. What does this mean and how could it have an effect on discovery of causations?

What on-scene observations may yield clues that separate the difference between an aircraft in-inflight fire from a ground fire? Why then is this difference important to note?

1. What is a fluid? How does it differ from a solid? How does a gas differ from a liquid?

2. What is the no-slip condition? What causes it?

3. What is a boundary layer? What causes a boundary layer to develop?

4. What is a Newtonian fluid? Give an example.

5. Consider two identical small glass balls dropped into two identical containers, one filled with water and the other with oil. Which ball will reach the bottom of the container first? Why?

Select the best answer for the question. 8. A/An _______ fuel-injection system uses individual pumps that are contained within a single injection pump housing. A. individual pump B. multiple-plunger, inline pump C. common rail D. distributor pump

For laminar flow in a circular pipe of diameter

, at what distance from the centerline is the actual velocity equal to the average velocity? Answer as a decimal version of the fraction of . For instance, for enter 0.25.

1)What does the conservation of energy state?

2)What are Sir Newton’s three laws of motion?

3)What are the differences between a liquid and a gas?

4)What are the different types of flow? Describe each type of flow?

5)What is Pascal’s Law?

6)What principle does a pump operate on?

7)What are the two board categories of pumps? Describe each.

8)Name three types of directional control valves and describe each.

9)What is pump cavitation? What rules should be followed to prevent/eliminate cavitation?

10)Differentiate between energy and power.

Design a four stroke cycle for SI engine using crankcase compression. Draw schematics of the six basic process: intake, compression, combustion, expansion, blowdown and exhaust. Describe fully the intake of air, fuel and oil.

I have a question for the effect and difference on a DC motor for the speed( rad/s) in time (sec) if you apply:

1. Nothing (so no charge in the circuit only the mecanic charge of the generator)

2. A resistant charge (only the resistant is plug in with the generator)

3. Short circuit (No exterior electric charge but the terminals are bounds together so an excessive amount of current flow into the circuit)

4. Capacitive charge (only the capacitor is plug in with the generator)

I would like to know a simple explaination of every result to know why it does that compared to the others please.

How much relative pressure can be achieved with a flat elbow design with baffles compared to a stacked elbow without baffles?

Write an abstract about hardness test of metal, also Rockwell Hardness test and Vickers Hardness Test?

* please do not write it with hand.

What are the responsibilities of a Maintenance Engineer. Please explain into details

What are “Rimmed” and “Killed” steels that an engineer should know? Explain them briefly.

How could we get the chemical element iron (Fe) that is required to make steel? In other words, what are the sources of Fe? Write two sources of Fe that an engineer should know

Traditional method of design and manufacturing is called Sequential Engineering. What would you call the process (__________ Engineering) in which the various teams (design, materials, manufacturing, etc.) work together simultaneously?

A steam Rankine cycle operates between the pressure limits of 1500 psia in the boiler and 1 psia in the condenser. The turbine inlet temperature is 800°F. The turbine isentropic efficiency is 90 percent, the pump losses are negligible, and the cycle is sized to produce 2500 kW of power. Calculate the mass flow rate through the boiler, the power produced by the turbine, the rate of heat supply in the boiler, and the thermal efficiency. Use steam tables