8) Why is trying to maintain uniform wall thickness important when designing for an injection molded part? What are some considerations?

6) Discuss what causes ‘weld lines’ in an injection molded part and why these pose a problem. Sketch examples.

Below is summary of meeting minutes during the design of Single Sampling Plan. Three people attended this meeting. These are the supplier, consumer, and inspector.

The consumer said that “if the fraction of the incoming shipment is less than or equal to 0.01, I will consider the shipment as a “GOOD SHIPMENT”

After a long discussion, they agreed that the bad shipment is the shipment with probability of having nonconforming item greater than or equal 0.13.

The supplier and consumers are agreed to assign 0.05 and 0.10 to the values of their risk, respectively.

Kindly, use the above information to complete the following tasks a- Outline the OC-Curve of the potential sampling plan (only shows the important points; see the last page on the lecture). b- Design a single sampling plan (find c and n).

c- Develop the full OC curve of the above plan. Use at least 5 points on the X-axis

(five values of the fraction of nonconforming) d- What is the probability of accepting a lot with P=0.005 using the above sampling plan. Show your results on the figure developed above.

What is the probability of accepting a lot with P=0.07 using the above sampling plan. Show your results on the figure developed above.

What is the probability of accepting a lot with P=0.15 using the above sampling plan. Show your results on the figure developed above.

the plan view of a flat bottomed pontoon with all its sides vertical is shown in figure below. the displacement including the load is 28tons. it is used in sea water for which the relative density can be taken as 1.025.

1.The metacentric height if the mass centre is 400mm above the base.
2.if part of the load having a mass of 1.2 tons is to be moved 500mm to one side of centre , calculate the expected angle of tilt this would cause.

What are some of the general inspections to perform on a Hartzell propeller?

What is propeller end-play in a variable pitch propeller?

What is meant by dressing a propeller nick and stress riser?

When should a variable pitch propeller be considered for overhaul?

When and per what reference should a Harzell variable pitch propeller air charge be checked?

Calculate V and Z for methyl chloride at 100 ° C and 55bar for the ideal gas equation, by the equation of virial. Data: R = 83.14 cm 3 bar/molK; viral coefficient B equals -242.5 cm3/mol.

briefly explain your understanding of design portfolio

pls I need details

What is the braking force? Bear in mind Newton’s laws of motion ;) deacleration is 8.23 m/s^2    over 30 m    no mass given for car. speed of car before brakeing is 80kmh

13.45 kN

17,941.4 N

17,941 kN

13,451 N

What are silicon carbide and silicon nitride, what are their strength and hardness?

A simple saturation cycle of refrigeration system is operating on R22. This system has an evaporator pressure of 350 kPa, condensing pressure of 1550 kPa and a discharge temperature of 80°C. Degree of sub cooling of 8 K and degree of superheat of 5 K. Draw p – h diagram and calculate the following.

a. Refrigeration Effect.

b. Refrigerant mass flow rate, at a plant capacity of 196 kW.

c. Power input into the compressor.

d. Coefficient of performance of the plant.

e. Compressor efficiency.

f. Total heat rejection.

g. Amount of condenser water required if LMTD of the water cooled condenser is limited to 8 K and the design ambient temperature is 20°C wet bulb.

calculate if a Briggs and Stratton engine of 208cc is enough to make a 2 seater car (225 to 300 kgs). I don't know the torque of the engine.

: For your selected gears, determine the following: center distance, pitch circle diameter, outer diameter (or addendum diameter), dedendum diameter, base circle diameter, circular pitch, tooth thickness, addendum, dedendum, clearance, whole depth.

Explain the following in corrosion
(a) Redox
(b) Electrolyte

A request has been received from an external customer for recommendations for linear position control sensors to be used in an explosive environment. For this reason unsafe electrical contacts must be avoided. The sensors will be installed in locations that are hazardous to access except when the plant is shut down annually for maintenance. The span required is 5cm. The sensor case must not permit any ingress of dust or of water.

State what type of position sensors you would recommend and give your reasons. Sketch both the recommended sensor and circuit, and explain its operation. Comment on how signal conditioning requirements can now be met. Identify the durability required in respect of dust and water ingress.

In a galvanised steel water supply line 100 m long and 50 mm in diameter, water is pumped from a reservoir to a vented storage tank at an elevation 8 m above it. The following fittings are use: 1 hinged foot valve with strainer, 3 x 90? elbows, 2 gate calves (open), 20 screwed sockets, 1 sudden exit. The water viscosity is 1 x 10-6 m2/s and the density is 1000 kg/m3.

(a) Calculate the friction factor at a flow rate of 3 L/s

(b) Using a constant friction factor as determined in (a), determine the system head equation in terms of velocity.

(c) Using a constant friction factor as determined in (a), determine the system head equation in terms of flow rate in L/s

(d) Using a constant friction factor as calculated in (a), determine the system head and fluid power for flow rates of 0, 1.5, 3, 4.5, and 6 L/s

(e) Draw the graph of system head and fluid power against flow rate on one sheet of graph sheet, using the values calculated in (d)

(f) If the efficiency of the pump is 65% when the flow rate is 5 L/s, determine the input power to the pump at this flow rate.