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a) You were assigned to determine the production rate for a polymer extrusion process. The extruder is found to have a barrel diameter = 4.5 in and length = 11 ft. The extruder screw rotates at 60 rev/min; it has channel depth = 0.35 inches and flight angle = 20°. Testing a sample of the plastic melt showed that it has a shear viscosity = 125 x 10-4 lb-sec/in2. The part is a round part with diameter 0.375 inches. Studying the die and the characteristics of the polymer, it has been found that the die swell (rs) is 1.2 and a land length Ld = 0.75 in. Determine: (a) Qmax and pmax, (b) the shape factor Ks (c) the values of Q and p at the operating point and (d) the production rate in length of the bar/min.
b) Your company is manufacturing a product in which all the gears are made of metal. The manager formed a committee to study the possibility of replacing some of the metal gears with plastic ones. You have been assigned to this committee. Make a list of the questions that you would raise before making such a decision (full mark for 8 relevant and related questions). Explain.
Solve the following two questions of the truss. Note that A and G are pin supports. 1) Sketch the influence lines for the force in bar DG (the load is moving on the top chord
SHIELDING GAS The primary function of the shielding gas is to exclude the atmospheric air from the arc zone. However, the shielding gas has significant influence on the arc cha
Determine the work done per minute by a punch tool making 20 working strokes min when a 30 mm diameter hole is punched in 5 mm thick plate with ultimate shear strength of 450 MPa i
Explain the Creation Phase of radial drilling machine Objective: "To generate alternative methods for providing the function, through creative thinking, brainstorming and
Find out Moment of Inertia: Find out Moment of Inertia of an I shaped area around its centroidal axis as illustrated in Figure. Solution (i) The area of
explain
Hammer/Mallet: Hammer is used to strike a job to bring it in shape or otherwise. It is made of carbon steel. The wooden handle does not allow the shock to hand but handles made in
Q. What is Clad plate and overlay welding? Strip back cladding on clad plate a minimum of 5 mm (3/16") from the edges of weld preparation before welding on the backing plate.
Flow Work and Flow Energy - thermodynamics: Flo w Work: The flow work is energy needed to move the working substance against its pressure It is called as flow or displac
Types of Cooling System: Two types of cooling system are used in two wheelers. (a) Natural air-cooling. (b) Forced air-cooling.
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