Design documents state that a total of six M10 x 1.5, class 5.8 bolt and nut pairs fasten a 15 mm thick steel cap to a 15 mm thick steel flange. Safety requirements dictate that this fastening system must possess a safety factor of 1.5. Use the preload determined in Part A when calculating the bolted joints safety in dynamic loading in Part B. (Note: One may find km using the method outlined in class, or one may use Eqn. 15.19 on p. 929). a) If the steel cap experiences a static external load of 30 kN, is this design safe? b) If the steel cap experiences an external load that varies from 10-20 kN and the bolted joint must be 99% reliable, is this design safe?

Q2/ In one of applications, wanted to condition laboratory at inside design condition DBT-24 °C and 50% Rh and outside design condition DBT-44 °C and WBT-27 °C. Total sensible load for the space is 35 kW and total latent load for the space is 19 kW. Rate of supplied air to the space is 11050 m'/hr and rate of outside ventilation air is 4250 m/hr. The recireulated air is mixing with the outside air and then entering to cooling coil and leaving at 95% Rh then the air is passing through heating coil before supply to the space. Determine: 1.Condition of supply air to the conditioned space (DBT & RH): 2.Condition of air before and after cooling coil (DBT & RH); 3. Sensible load of heating coil; 4.Sensible load and latent load and total load of cooling coil: 5. Apparatus dew point (ADP) for the cooling coil; 6. Draw the cycle on the psychrometric chart.

To be able to use the conservation of energy on a moving body to determine key characteristics about the mechanics of the system. A package of mass m = 0.70 kg is pushed across the surface by a jet of compressed air during an assembly-line process. The package is moved through a distance of s = 49.0 cm . The package and the surface are known to have a coefficient of kinetic friction of ? k = 0.13 . The package is initially at rest for this process.

A)If the package must be moving at a speed of v = 10.5 cm/s when it has reached the distance of 49.0 cm , determine the average force that the jet of compressed air must supply to the package

B) If it is now desired that the package be at rest when it has reached the distance of 49.0 cm , determine the average force that the jet of compressed air must supply to the package if the package is initially traveling in the s direction at a velocity of v = 19.0 cm/s .

C) If the plant has changed the mass of the package on the assembly line to m = 1.25 kg , determine the average force that the jet of compressed air must supply to the package if the package and surface now have a coefficient of kinetic friction of ?k = 0.18 . Use the same initial and final conditions as in Part B.

A major application of ferro- and ferrimagnetic materials is in transformer and motor cores. Materials are required that are magnetically soft (high permeabilities – they are magnetized easily at low applied fields and a low coercive field) with large power-handling capacity and low losses. Why cannot pure iron metal be used in transformer cores?

Account for the magnetic behavior of the following spinels:
(a) ZnFe2O4 is antiferromagnetic
(b) MgFe2O4 is ferrimagnetic and its magnetic moment increases with temperature

c) MnFe2O4 is ferrimagnetic and its magnetic moment is independent of temperature

equation of motion

Material Science:

If you were to be given a DSC (Differential scanning calorimetry) trace of a polymer, how would you identify changes and characteristics of the polymer? I understand this is a vague question, but please try your best, I'm lost!

Thermodynamic

In a piston-cylinder air at 100 kPa and 15°C undergoes the following cycle. First, it is compressed isentropically to a compression ratio of 20. Then 1800
kJ/kg of heat is transferred to the air at constant pressure. Afterwards the air expands isentropically. In the last step, heat is removed at constant volume until the air reaches its original state. Assuming air behaves as an ideal gas and with Cp and Cv independent of temperature, determine the:
(a) pressure and temperature at each point in the cycle,
(b) thermal efficiency of the cycle, and
(c) mean effective pressure.

Please work by step and orderly to easy work

Define hardness, and explain the variation of hardness with respect to the slip systems in the material.

A Carnot heat engine within a piston cylinder has 10 kg of air as the working fluid and operates between 1000 K and 350 K. During the heat addition process the pressure changes by a factor of 2.5. The volume at the end of the isentropic compression process is 5m^3. Determine the pressure at each state in kPa and the net heat of the cue in KJ assuming Constant Heats at 300 K. Draw a P-v and T-s diagram

So what is the basic definition of Mechanical and Electrical Systems? In addition, what does the word "energy" mean?

This is for a VF-30 Bonfiglioli worm drive Gearbox

6.1 Housing

6.2 Worm Gear

6.3 Worm Shaft

For each of the MAJOR components (6.1, 6.2 and 6.3) stated only, analyze and identify the manufacturing processes used to make the component – both primary (bulk shape forming) and secondary (or finishing) processes. Include sub-sub-section as follows for each component:

o 6.1.1 Component Observations: Describe your observations of the physical component which indicate what manufacturing processes were performed. Include an annotated picture with arrows pointing to the features.

o 6.1.2 Manufacturing Process: With supporting literature and research, describe the chosen manufacturing process concisely in detail, noting its advantages and disadvantages – describe it in the context of the gearbox you are looking it, not just generally. Detail the advantages and disadvantages of these processes: Relate the chosen method to the production volume of the gearbox.

o 6.1.3 Material Relationship: Relate to the material and its appropriateness in this manufacturing method (e.g. does it have suitable castability?)

A rail-gun fires a tungsten projectile horizontally with an exit muzzle velocity of 1500 m/s. The horizontal acceleration of the projectile is given as ax = -40vx^2 + 125000vx - 96900000 where vx = horizontal velocity. The muzzle is 50 meters off the ground. At what distance, in meters, from the muzzle will the projectile strike the ground if the ground remains level? Do not neglect the effects due to gravity.

Please help, I don't understand how to do this problem since acceleration in the x direction is not constant.

4- If the drag force on a smooth sphere depends on the velocity (V), sphere diameter (D), viscosity (?), and density (?), use dimensional analysis to show the drag coefficient on the sphere is a function of the Reynolds number only. (15%) ?

Explain How fuel system components works:

Booster pump-

Jet Pump-

Surge tank-

Crossfeed valve-

Jettison valve-

Capcitance fuel gauge-

What is the purpose of a throttling valve? What are the implications of having a throttling valve prior to the pump inlet? Explain in terms of NPSH. i.e. what will happen if the valve is placed before the pump? or why do we put the valve after the pump instead of before the pump.