A reaction turbine whose runner radii are r₁ =300 mm, r₂ = 150 mm, operates under the following conditions; Q = 2.3 m³/s, w = 25 rad/s, α1 = 26 ⁰ , α2 = 83 ⁰ , V₁ = 9.3 m/s, V₂ = 4.5m/s. for an efficiency of 93 %, find;
(i) Torque applied,
(ii) Power of fluid and
(iii) Head on turbine.

Bolt Fastener Design:

Calculate the fastener and bolt stiffness and required length for a M14x2 hex head bolt and nut used to assemble two 16mm steel plates

The design condition for a space is 77 F (25 C) db and 50 percent relative humidity with 55 F (13 C) db supply air at 90 percent relative humidity A 50-ton, constant-volume space air conditioning system uses face and bypass and water temperature control. Outdoor air is supplied at 95 F (35 C) db, 60 percent relative humidity with a ratio of 1 Ibm (kg) to 5 Ibm (kg) return air. A part-load condition exists where the total space load decreases by 50 percent and the SHF increases to 90 percent. The outdoor air condition changes to 85 F (29 C) db and 70 percent relative humidity. Assume sea-level pressure. (a) At what temperature must the air be supplied to the space under the part-load condition? (b) If the air leaving the coil has a dry bulb temperature of 60 F (15 C), what in the ratio of the air bypassed to that flowing through the coil? (c) What is the apparatus dew point temperature for both the design and part-load conditions? (d) Show all the processes on a psychrometric chart.

A compound tube is formed by shrinking together two tubes with common radius 150 mm and thickness 25 mm. The shrinkage allowance is to be such that when an internal pressure of 30 MN/m2 (300 bar) is applied the final maximum stress in each tube is to be the same. Determine the value of this stress. What must have been the difference in diameters of the tubes before shrinkage? E = 210GN/m2.

Why do we use angled drafts in casting

A 0.2 m^3 piston/cylinder contains air at 400 K and 400 kPa and receives heat from a constant temperature heat source at 1300 K. The piston expands at constant pressure to a volume of 0.6 m^3. Determine the change of availability of the system. Assume To= 300K and Po = 100kPa.

Answer should be 210.3 kJ.

How does shot peening introduce residual stresses over a material surface?

Explain its mechanism by drawing the material surface plastically deformed as a result of the impact of the shot.     

Consider the combined power cycle for which Qin=Qin1 ,Qout=Qout2 and Wcycle=Wcycle1 + Wcycle2. Derive an expression for the thermal efficiency ? of the combined power cycle in terms of ?1 and ?2.

Prove that ? > ?1 and ? > ?2. In plain English, you are being asked to prove that the combined power cycle is more efficient than each of the two cycles alone [Hint: Starting from the expression for ? derived in part (ii), each of the two proofs requires exactly one additional step and no more.]

Explain the significance of statistical scatter in fatigue life, especially how this may affect the use of S-N curves for engineering purposes.

Describe the general and specific industry application in relation to the Bonfiglioli VF 30 gearbox design.

A Rankine cycle uses water as its working fluid. The mass flow rate of water through the cycle is 150 kg/s. Superheated vapour exits the boiler at 8 MPa and 560 °C. The condenser pressure is 8 kPa. The water at the pump inlet is 35 °C. The isentropic efficiency of the pump is 75% and the isentropic efficiency of the turbine is 91%. The turbine and pump can be treated as adiabatic. The pressure drops of the working fluid as it follows through the boiler and through the condenser are negligible. Kinetic and potential energy effects can also be ignored. For your analysis use the state point numbering scheme indicated in the following schematic: Do the following:

I. Draw the state points on a T-s diagram. Take care to locate each point in the correct region: superheated, mixed and subcooled.

II. Calculate the power developed in by the turbine.

III. Calculate the rate of heat transfer to the steam passing through the boiler.

IV. Calculate the power consumed by the pump in MW.

V. Calculate the rate of heat transfer from the cycle to the cooling water in the condenser in MW.

VI. Calculate the cycle’s back work ratio.

BONUS: Comment on state 2, what kind of effect can this have on the turbine performance?

two subway cars as shown in Figure 1 have mass m = 2000 kg and are connected by a coupler that can be modeled as a spring of stiffness k = 280,000 N/m. Use Newton’s method to derive the equations of motion, calculate the natural frequencies and determine the associated mode shapes. also, find the time response x1(t) and x2(t) of the subway initial conditions: x(0)= [ 0, 0.2] with zero initial velocity vector.  

Impact of contemporary robotics in Germany

My goal is to be a NC-programmer of CNC machinist.

"Describe/illustrate if all conditions were ideal and you believed that all things were possible, what would you seek to achieve as your life's work or major accomplishment?"

Please write the answer at least 200 words. Thanks.

Studs used in a turbo pump were made from 0.35C-1.5Ni-1.0Cr-0.2Mo steel, quenched and tempered to 400 HV hardness, cadmium-plated and baked at 200°C for 2 h. The studs used in a turbo pump failed after 3 months of assembly. A fractograph of a failed stud revealed a predominantly intergranular mode mixed with ductile failure features. Increasing the baking time to 12 h considering the low diffusivity of hydrogen across the relatively impervious cadmium coating solved the problem. Explain the cause and mode of this failure.