what is firehole furnace, bottom blow down and feedwater pump. parts of a boiler

What is the difference between the ECI and body frames?

A steel wire with a cross-section area 2.5X10^-3 m2 and a length of 10 m is used to pull a truck on the road. The truck is 10 tons and the friction coefficient between the tires and road is 0.25N/kg. Steel has a Young’s modulus 250MPa.

Suppose this wire contain surface cracks. Determine the largest linear size of the surface crack so that the wire will not fail due to fracture in this application. Kc = 0.1 MPa m^0.5

(1) Problem 9-33 (show the solution process in detail)

9-33 An ideal Otto cycle has a compression ratio of 8. At the beginning of the compression process, air is at 95 kPa and 27°C, and 750 kJ/kg of heat is transferred to air during the constant-volume heat-addition process. Taking into account the variation of specific heats with temperature, determine (a) the pressure and temperature at the end of the heat-addition process, (b) the net work output, (c) the thermal efficiency, and (d) the mean effective pressure for the cycle. Answers: (a) 3898 kPa, 1539 K, (b) 392.4 kJ/kg, (c) 52.3 percent, (d) 495 kPa

(2) Problem 9-33 but assume constant specific heats.

Please help with problem 2 only. Thank you

List the advantages of using sheet metal parts ?

List the advantages and disadvantages of using a lubricant in forging ?

Two trains of equal weight, moving with velocities of 30 miles an hour each and in opposite directions collide. Show that the loss of energy caused by the impact is the same as in the case of a train moving at 60 miles an hour striking another at rest. In the latter case, find the velocity with which the debris will be moved along the track. Also show that before impact the total energy in the one case is doubled that in the other

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Explain SIMPLE INDEXING in Manufacturing of gears with an example

Complete the following table for H₂O. Use data from the steam tables.

A band is playing at the Falls Festival. The stage is 1.5m off the ground and there is a flat wall behind them. The sound radiates out from the band, acting like a spherical sound source, and the audience does not reflect any of the sound. If the sound pressure levels 45m from the band are measured at 120dBA, how far from the band do you need to be standing to have the sound loudness double? *Please note: The Directivity Index for a flat wall at the center of a surface can be approximated as 3

2)  

If a casting is cooled quickly, we expect the SDAS to?

a) increase b) decrease c) not be affected

A casting process which uses silica grains bonded with clay would be?
a) investment casting b) sand casting c) die casting

A casting process which forces liquid metal into a permanent mold would be?

a) permanent mold casting b) sand casting c) die casting

A casting process which uses a temporary ceramic mold would be?
a) centrifugal casting b) sand casting c) investment casting

To achieve the best properties in a casting, we need?
a) the fastest cooling rate b) sand casting c) a good riser

Which of the following is also a solidification process?

a) riveting b) screwing c) welding

If the tensile test of a material has only a linear elastic portion and no plasticity, it is most likely?

a) metal b) thermoplastic above Tg c) elastomer d) ceramic

A 1000 MW power plant of 35% thermal efficiency is proposed. The plant burns 3% sulphur coal with a heating value of 6000 Kcal/kg and emits 64000 m3/min of flue gas. What is the concentration of SO2 in the flue gas in ppm? Assume that the density of SO2 is 1920 g/m3.

draw a sketch for wet armature solenoid. describe how a wet armature solenoid works.