The conceptual, preliminary design, and detail design and development of a Power breaker speed breaker in systems engineering.

1. What is significance of powder shape in relation to density and strength of the powder metallurgy parts?
2. What is significance of metallic powder flow rate, density and green strength?
3. Graphite can be used as a lubricant in the metallic powder; what is advantage of using the graphite in addition to providing lubrication?
4. Describe isostatic compaction method, and identify its advantage over conventional powder pressing method?
5. Define liquid phase sintering, and explain it.
6. What is sinter brazing?
7. Identify one application of powder metallurgy which is based on impregnation.
8. List one application of powder metallurgy parts that utilizes infiltration.
9. Would you be able to make undercuts in the metallurgy parts through the powder metallurgy process? Explain.
10. Define sizing, and explain why it is performed?
11. Which environment would you recommend while performing a sintering process, and why? Oxidizing, reducing, or neutral
12. Identify at least one problem associated with using carburizing environment while sintering the plain carbon steel sprockets.
13. Identify at least one problem associated with using oxidizing environment while sintering plain carbon steel gears?
14. Search literature and identify at least one application of powder metallurgy to manufacture tools using composite materials.
15. Metallic sheets can be manufactured through rolling process using either plate or metallic powder as starting material; identify one drawback and one comparative advantage in each case.

Electronic Manufacturing cannot be realized without Advance Manufacturing Technology. Justify this statement with appropriate examples.

Define And Writes its Formulas.

(i) instantaneous added mass, added damping, work done by damper, and work done by fluid.

(ii) time-mean added mass, time-mean added damping, time-mean work done by damper and time-mean work done by fluid.

A steam turbine receives 8 kg/s of steam at 9 MPa, 650 C and 60 m/s (pressure, temperature
and velocity). It discharges liquid-vapor mixture with a quality of 0.94 at a pressure of 325 kPa
and a velocity of 15 m/s. In addition, there is heat transfer from the turbine to the surroundings
for 560 kW. Find the power produced by the turbine and express it in kW.

Cylindrical water tanks are usually found on high-rise buildings and they are filled with water. Due to the weight of the water, collapses occur at the bottom of the tank. Depression (a) in the tank bottom depends on the diameter of the tank (D), the density of the water (c), the acceleration of gravity (g), the height of the water in the tank (h), the thickness of the tank bottom (t) and the modulus of the tank material (E). Using the Buckingham Pi theorem, obtain a functional expression for the collapse of the tank bottom (a).

A Pelton wheel functions under an available head of 150 m and consumes 50 liters of water per sec. The 600 mm diameter wheel rotates at 600 rpm. The coefficient of velocity of the nozzle is 0.98. The blade angle at the outlet is 16o . If the relative velocity at outlet is 90% of that at inlet.

i) Find the velocity of whirl at outlet

ii) Estimate the work done by the runner per sec

iii) Estimate the hydraulic efficiency

iv) Calculate the diameter of the nozzle, and

v) Comment on why the hydraulic efficiency of the wheel is relatively low and how can it be improved.

1. The yield strength and grain size of a metal are as follows

                                                  σy                       d (mm)                    

                                               220 MPa                4 x 10-2                      

                                               285 MPa                1 x 10-3                      

a. Calculate σ0

b. Calculate ky

c. At what grain size is a strength of 350 MPa possible?

d. “If the grain size is continuously decreased then the strength can be continuously increased without any upper limit, to infinite strength” Do you think this statement is possible or impossible. Please explain.

(True or False) After diagnostic of an evaporator coil found covered with 1/2 of the coil of low & insufficient refrigerant levels?

Steam at 10 MPa , 600 ° C enters the first - stage turbine of an ideal Rankine cycle with reheat . The steam leaving the reheat section of the steam generator is at 500 ° C , and the condenser pressure is 6 kPa . If the quality at the exit of the second stage turbine is 90 % , determine the cycle thermal efficiency .

PLEASE READ THIS CAREFULLY FIRST BEFORE ANSWERING!!!!!! A DOWN VOTE WILL BE GIVEN IF YOU JUST PASTE AN ANSWER WITHOUT JUSTIFYING IT LIKE I'M ASKING FOR.

I know this question is already on here but i have seen too many differing answers for a) and ultimately b) & c) so i am after justification for your answer that you provide. The main answers i have seen for a) are 35955.4 Kg/Hr and 44398.3 Kg/Hr dependant on which side they put the 0.9. Again please justify why you put the 0.9 on the side you do.

For b) i have seen 2 differing answers also of 1134.8 and 619 depending on if they convert to Kelvin or not. Again please explain why if you do or don't do so.

a) Dry sat steam at 180 degrees is to be produced in a fire tube boiler from the cooling of 50000 kg h-1 of flue gases from a pressurised combustion process. the gases enters the tubes of the boiler at 1600 degrees and leave at 200 degrees. The feed water is externally pre-heated to 180 degrees before entering the boiler.

The specific heat capacity of the flue gases is 1.15 kj kg^-1 k^-1

The latent heat of vapourisation of the water at 180 degrees is 2015 kj kg^-1

Feed water temp 180 degrees.

Determine amount of steam produced per hour, if total heat loss is 10 percent of the heat available for steam raising.

b) The overall heat transfer coefficient based on the outside area of the tubes is given as 54 Wm^-2K^-1. Determine the area of heat transfer required to perform this duty

c) The tubes within the boiler are to be 25 mm inside diameter with a wall thickness of 3 mm. The average flue gas velocity through the tubes to maintain the overall heat transfer coefficient value and to minimise pressure losses is to be more than 22 m s–1 and less than 28 m s–1 .

Assuming that the average density of the flue gases is 1.108 kg m–3 , calculate:

i) the minimum and maximum number of tubes in each pass

ii) the overall length of tubes at each of these numbers of tubes

iii) the minimum number of tube passes in each case, if the length of a boiler tube is to be less than 5 metres.

1) The flow rate of a liquid which is discharged by a pump is given by Q and the head is given by H. The specific gravity of the liquid which has a standard unit of kg/m2.s2, is denoted by SG. Using dimensional analysis, find the expression for pumping power (P) for this machine.

2) An axial pump has a rotor diameter of 32 cm. The pump discharges water (ρwater = 1000 kg/m3) at a rate of 2.5 m3/min while rotating at 1450 RPM. The energy input to the pump is 120 J/kg and the overall efficiency is 78%. If a scale model of this pump has a rotor diameter of 22 cm and rotates at 2900 RPM, calculate:
(i) flow rate of water in the model pump;
(ii) change in total pressure from the model pump; and
(iii) input power to the model pump.

The filtration is carried out for 15 min at a constant rate in a leaf filter and continued at constant pressure using a cake that is incompressible with a filter medium resistance that is negligible. This pressure is that attained at the end of the constant rate period. The volume collected during the constant rate period = volume collected at constant pressure, what is the total filtration time?

Cold air at temperature of 10 C and velocity of 3 m/s is moving parallel to a flat plate with the length of 6 m and surface temperature of 75 C. A) Find the transition location on the plate and the heat loss from the plate. B) Repeat part (A) for water at the same velocity and temperature. The flat plate is made from copper.